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Colm Whelan

Colm Whelan


Professor & Eminent Scholar
Physics

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  • Articles

    Campeanu, R. I., Walters, H. R., and Whelan, C. T. (2015). A coincidence study of electron and positron impact ionization of Ar (3p) at 1 keV. The European Physical Journal D, 69 (10), pp. 235.
    Walters, H. R., and Whelan, C. T. (2015). Differential ionization of a one-electron target under bare-ion impact: Application to proton-impact ionization of atomic hydrogen. Physical Review A, 92 (6), pp. 062712.
    Miller, F., Walters, H. R., and Whelan, C. T. (2015). Energy-sharing (e, 2 e) collisions: Ionization of the inert gases in the perpendicular plane. Physical Review A, 91 (1), pp. 012706.
    Walters, H. R., and Whelan, C. T. (2014). Differential ionization of Li (2 s) and Li (2 p) under proton and O 8+ impact. Physical Review A, 89 (3), pp. 032709.
    Naginey, T. C., Stacy, E. W., Walters, H., and Whelan, C. T. (2014). Estimating positronium formation for plasma applications. Phys Rev A, 89, pp. 062704.
    Naginey, T. C., Pollock, B. B., Stacy, E. W., Walters, H., and Whelan, C. T. (2014). Positronium formation from positron impact on hydrogen and helium targets. Phys Rev A, 89, pp. 012708.
    Lower, J., and Whelan, C. T. (2013). Spin resolved atomic (e,2e) processes. Fragmentation Processes: Topics in Atomic and Molecular Physics pp. 263.
    Walters, H. R., and Whelan, C. T. (2012). Ionization of He by C 6+, C 6-, e-, and e+. Physical Review A, 85 (6), pp. 062701.
    Scott, H. A., Whelan, C. T., and Glenzer, S. H. (2011). On the contributon of doubly excited ionic states to the properties of hot dense plasmas. High Energy Density Physics, 7 (042704), pp. 371-376.
    McGovern, M., Whelan, C. T., and Walters, H. R. (2010). C 6+-impact ionization of helium in the perpendicular plane: ionization to the ground state, excitation-ionization, and relativistic effects. Physical Review A, 82 (3), pp. 032702.
    McGovern, M., Assafrao, D., Mohallem, J. R., Whelan, C. T., and Walters, H. J. (2010). Coincidence studies of He ionized by C⁶⁺,Au²⁴and Au⁺⁵³⁺. Phys Rev A, 81 (042704), pp. 14.
    McGovern, M., Assafrao, D., Mohallem, J. R., Whelan, C. T., and Walters, H. R. (2010). Pseudostate methods and differential cross sections for antiproton ionization of atomic hydrogen and helium. Physical Review A, 81 (3), pp. 032708.
    Mc Govern, M., Whelan, C. T., and Walters, H. J. (2010). C⁶⁺ionization of helium in the perpendicular plane:ionization to the ground state, excitation-ionization and relativistic effects. Phys Rev A, 82, pp. 032702.
    McGovern, M., Assafrao, D., Mohallem, J. R., Whelan, C. T., and Walters, H. J. (2009). Differential and total cross section for antiproton impact ionization of atomic hydrogen and helium. Phys Rev A, 79 (4), pp. 18.
    Martinez, J., Whelan, C. T., and Walters, H. J. (2008). Coincidence studies of electron impact ionization of atomic inner shells. Eur Phys J.D, 46, pp. 409-411.
    Godunov, A., Walters, H. J., and Whelan, C. T. (2008). Effect of angular electron correlation in He: Second-order calculations for transfer ionization. Physical Review A, 78, pp. 012714.
    Bolognesi, P., Pravica, L., Veronesi, S., Fainelli, E., Martinez, J., Walters, H. R., Whelan, C. T., Bohachov, H., Borovik, A., and Avaldi, L. (2008). Mg 2 p ionization by electron impact. Physical Review A, 77 (5), pp. 054704.
    Martinez, J., Whelan, C. T., and Walters, H. J. (2008). The electron impact ionization of one and two electron atoms and ions close to the ionization threshold. J Phys B, 41 (065202), pp. 8.
    Bolognesi, P., Bogachev, G., Borovik, V., Veronesi, S., Flammini, R., Fainelli, E., Borovic, A., Martinez, J., Whelan, C. T., Walters, H. J., Kheifets, A., and Avaldi, L. (2008). The ionization of Mg by electron impact at 1000 eV studied by (e,2e) experiments. J Phys B, 41 (015201), pp. 7.
    Staicu Casagrande, E. M., Catoire, F., Naja, A., Ren, X. G., Lahmam-Bennani, A., Nekkab, M., Dal Cappello, C., Bartschat, K., and Whelan, C. T. (2007). Angular correlations between scattered ejected and Auger electrons from ionisation of Argon, investigated by means of (e,2e) and /or(e,3e) coincidence experiments. Journal of Electron Spectroscopy, 161, pp. 27-30.
    Godunov, A., Kampp, M., Sulik, B., Walters, H. J., and Whelan, C. T. (2007). Coincidence Studies of Ionization Processes. Nuc Inst and Meth B, 261, pp. 222-225.
    Schöffler, M., Titze, J., Schmidt, L., Jagutzki, O., Schmidt-Boecking, H., Doerner, R., Whelan, C. T., Godunov, A., and Walters, J. (2007). Ground state correlation and dynamical processes in fAst ion-helium-collisions. Verhandlungen der Deutschen Physikalischen Gesellschaft, 42 (3),
    Godunov, A., Kampp, M., Sulik, B., Walters, H. R., and Whelan, C. T. (2007). On the extension of (e, 2e) theory to coincidence studies of ion–atom collisions. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 261 (1), pp. 222–225.
    Bellm, S., Lower, J., Kampp, M., and Whelan, C. T. (2007). The effect of target fine-structure on the measured spin asymmetries for the electron-impact ionization of Ar (2p). Journal of Electron Spectroscopy and Related Phenomena, 161 (1), pp. 6–10.
    Whelan, C. T., Nesbet, R., and Martinez, J. (2007). X 2e: A general quantitative approach to the calculation of (e, 2e) and related processes. Journal of Electron Spectroscopy and Related Phenomena, 161 (1), pp. 67–72.
    Casagrande, E. S., Catoire, F., Naja, A., Ren, X., Lahmam-Bennani, A., Nekkab, M., Dal Cappello, C., Bartschat, K., and Whelan, C. T. (2007). New coplanar (e, 2e) experiments for the ionisation of He and Ar atoms. Journal of Electron Spectroscopy and Related Phenomena, 161 (1-3), pp. 27–30.
    Naja, A., Staicu Casagrande, E. M., Ren, X. G., Catori, F., Lahmam-Bennani, A., Cappello, C. D., and Whelan, C. T. (2007). An (e,2d)-(e,3e) investigation of argon, competion between inner shell ionization and direct double ionization processes. Journal of Physics B: Atomic, Molecular and Optical Physics, 40 (14), pp. 2871-2884.
    Bellm, S., Lower, J., Kampp, M., and Whelan, C. T. (2006). Spin Asymmetries in the electron-impact ionization of Ar(2p). J phys B, 39, pp. 4759-4766.
    Godunov, A., McGuire, J. H., Schipakov, V. S., Walters, H. J., and Whelan, C. T. (2006). Total cross sections for transfer-ionization in fast ion-helium collisions. J Physics B, 39, pp. 985-996.
    Pyper, N., Kampp, M., and Whelan, C. T. (2005). Atomic and molecular collisions and interactions-Symmetry properties of the S matrix in a fully relativistic distorted-wave treatment of electron-impact ionization. Physical Review-Section A-Atomic Molecular and Optical Physics, 71 (5), pp. 52701–52701.
    Godunov, A., Whelan, C. T., Walters, H. R., Schipakov, V., Schoffler, M., Mergel, V., Dorner, R., Jagutzki, O., Schmidt, L. P., Titze, J., and others (2005). Atomic and molecular collisions and interactions-Transfer ionization process p+ He–> H0+ He2++ e-with the ejected electron detected in the plane perpendicular to the incident beam direction. Physical Review-Section A-Atomic Molecular and Optical Physics, 71 (5), pp. 52712–52712.
    Schoffler, M., Godunov, A., Whelan, C. T., Walters, H. J., Schipakov, V. S., Mergel, V., Dorner, D., Jagutzki, O., Schmidt, L. H., Titze, J., Weigold, E., and Schmidt-Bocking, H. (2005). Revealing the effect of angular correlation in the ground state. J Phys B, 38 (L123-L128),
    Schöffler, M., Godunov, A., Whelan, C. T., Walters, H. R., Schipakov, V., Mergel, V., Dörner, R., Jagutzki, O., Schmidt, L. P., Titze, J., and others (2005). Revealing the effect of angular correlation in the ground-state He wavefunction: a coincidence study of the transfer ionization process. Journal of Physics B: Atomic, Molecular and Optical Physics, 38 (8), pp. L123.
    Pyper, N. C., Kampp, M., and Whelan, C. T. (2005). Symmetry properties of the S matrix in a fully relativistic distorted-wave treatment of electron-impact ionization. Phys Rev A, 71 (05271),
    Godunov, A., Whelan, C. T., Walters, H. J., Schipakov, V. S., Schoffler, M., Mergel, V., Dorner, R., Jagutzki, O., Schmidt, L. H., Titze, J., and Schmidt-Bocking, H. (2005). Transfer ionization process p + He-> H⁰+ He² + e‾ with the ejected electron detected in the plane perpendicular to the incident beam direction. Physical Review A, 71 (5), pp. 052712.
    Schmidt-Böcking, H., Schöffler, M. S., Jahnke, T., Czasch, A., Mergel, V., Schmidt, L., Dörner, R., Jagutzki, O., Hattass, M., Weber, T., Weigold, E., Schmidt, S. T., Schuch, R., Cederquist, H., Demkov, Y., Whelan, C. T., Godunov, A., and Walters, J. (2005). Many-particle fragmentation processes in atomic and molecular physics–new insight into the world of correlation. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 233 (1), pp. 3–11.
    Godunov, A., Whelan, C. T., and Walters, H. R. (2004). Fully differential cross sections for transfer ionization? sensitive probe of high level correlation effects in atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 37 (10), pp. L201.
    Kampp, M., Kawano, S., Roche, P., Rasch, J., Madison, D. H., Walters, H. R., and Whelan, C. T. (2004). On the observation of the fine structure effect in non-relativistic (e, 2e) processes. The European Physical Journal D-Atomic, Molecular, Optical and Plasma Physics, 29 (1), pp. 17–19.
    Chen, Z., Madison, D. H., Whelan, C. T., and Walters, H. R. (2004). Second-order distorted wave calculation for electron impact ionization of hydrogen. Journal of Physics B: Atomic, Molecular and Optical Physics, 37 (5), pp. 981.
    Kampp, M., Pyper, N., Whelan, C. T., and Walters, H. R. (2003). Spin asymmetries in spatially resolved processes of ionization of heavy atoms by relativistic electrons. Physical Review-Section A-Atomic Molecular and Optical Physics, 67 (4), pp. 44702–45200.
    Biava, D., Saha, H., Engel, E., Dreizler, R., McEachran, R., Haynes, M. A., Lohmann, B., Whelan, C. T., and Madison, D. H. (2002). Exchange effects in low energy electron impact ionization of the inner and outer shells of argon. Journal of Physics B: Atomic, Molecular and Optical Physics, 35 (2), pp. 293.
    Kampp, M., Whelan, C. T., and Walters, H. R. (2002). On the electron impact ionization of multi-charged ions: a theoretical investigation of relativistic effects. Journal of Physics B: Atomic, Molecular and Optical Physics, 35 (18), pp. 3923.
    Kampp, M., Roche, P., Whelan, C. T., Madison, D., Rasch, J., and Walters, H. R. (2002). The electron impact ionization of magnesium (2p). Journal of Physics B: Atomic, Molecular and Optical Physics, 35 (10), pp. 2325.
    Pyper, N., Essex, D., and Whelan, C. T. (2001). The $1s21s2p (1P)$ excitation energy for helium atoms in liquid helium, solid helium and helium bubbles in metals!!!. Philosophical Magazine B, 81 (1), pp. 91.
    Schulz, M. A., Moshammer, R., Madison, D., Olson, R., Marchalant, P., Whelan, C., Walters, H. R., and others (2001). Triply differential single ionization cross sections in coplanar and non-coplanar geometry for fAst heavy ion-atom collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 34 (9), pp. L305.
    Marchalant, P. J., Rouvellou, B., Rasch, J., Rioual, S., Whelan, C. T., Pochat, A., Madison, D. H., and Walters, H. R. (2000). Excitation-ionization of helium to He+ (n= 2) at 365.8 eV. Journal of Physics B: Atomic, Molecular and Optical Physics, 33 (20), pp. L749.
    Duguet, A., Lahmam-Bennani, A., Lohmann, B., Rasch, J., Whelan, C. T., Walters, H. J., and others (1999). (e, 2e) ionization of the 2p orbital of argon. Journal of Physics B: Atomic, Molecular and Optical Physics, 32 (1), pp. L5.
    Keller, S., Ancarani, L., Ast, H., Dreizler, R., Walters, H. R., and Whelan, C. (1999). Analysis of relativistic (e, 2e) experiments in coplanar asymmetric geometry. Le Journal de Physique IV, 9 (PR6), pp. 215.
    Cavanagh, S., Lohmann, B., Rasch, J., Whelan, C. T., and Walters, H. R. (1999). Experimental and theoretical determination of the triple differential cross section for Kr (4 p) electron-impact ionization. Physical Review A, 60 (4), pp. 2977.
    Marchalant, P. J., Rasch, J., Whelan, C. T., Madison, D., and Walters, H. R. (1999). First and second Born calculations of (e, 2e) excitation-ionization of helium. Journal of Physics B: Atomic, Molecular and Optical Physics, 32 (24), pp. L705.
    Whelan, C. T. (1999). Fragmentation Processes in Atomic Collisions. Science, 286 (5449), pp. 2457.
    Essex, D., Nellist, P., and Whelan, C. T. (1999). Limitations of the dipole approximation in calculations for the scanning transmission electron microscope. Ultramicroscopy, 80 (3), pp. 183.
    Lucey, S., Rasch, J., and Whelan, C. T. (1999). On the use of analytic ansatz three–body wave functions in the study of (e, 2e) band related processes., 455 (1981), pp. 349–383.
    Nakel, W., and Whelan, C. T. (1999). Relativistic (e, 2e) processes. Physics reports, 315 (6), pp. 409–471.
    Ancarani, L. U., Ast, H., Keller, S., Dreizler, R., Whelan, C. T., and Walters, H. R. (1999). Analysis of semi-relativistic approximations for relativistic (e, 2e) experiments. Journal de Physique-Colloques, 9 (PR6), pp. 225-228.
    Essex, D., and Whelan, A. (1999). Grazing angle (e, 2e) calculations for surface adsorbates. Le Journal de Physique IV, 9 (PR6), pp. 165-169.
    Keller, S., Dreizler, R. M., Ancarani, L. U., Ast, H., Walters, H. R., and Whelan, C. T. (1999). Interpretation of relativistic (e, 2e) experiments in coplanar asymmetric geometry: Atomic-number-dependent effects. Physical Review A, 59 (2), pp. 1284.
    Rouvellou, B., Rioual, S., Röder, J., Pochat, A., Rasch, J., Whelan, C. T., Walters, H. R., and Allan, R. (1998). Coulomb three-body effects in electron-impact ionization of argon. Physical Review A, 57 (5), pp. 3621.
    Lucey, S., Rasch, J., Whelan, C. T., and Walters, H. R. (1998). Gauge discrepancies in calculations of on helium. Journal of Physics B: Atomic, Molecular and Optical Physics, 31 (6), pp. 1237.
    Ancarani, L., Keller, S., Ast, H., Whelan, C. T., Walters, H. R., and Dreizler, R. (1998). Influence of Coulomb boundary conditions for (e, 2e) processes on the K-shell of high-Z atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 31 (3), pp. 609.
    Spivack, O Rath, Rasch, J., Whelan, C. T., Allan, R., and Walters, H. R. (1998). processes with positive-ion targets in coplanar symmetric geometry. Journal of Physics B: Atomic, Molecular and Optical Physics, 31 (4), pp. 845.
    Keller, S., Ast, H., Ancarani, L. U., Whelan, C. T., Walters, H. R., and Dreizler, R. (1998). Remark on the theory of three-body effects in relativistic (e, 2e) processes. Journal of Physics B: Atomic, Molecular and Optical Physics, 31 (20), pp. L873.
    Marchalant, P. J., Whelan, C. T., and Walters, H. R. (1998). Second-order effects in (e, 2e) excitation-ionization of helium to (n= 2). Journal of Physics B: Atomic, Molecular and Optical Physics, 31 (6), pp. 1141.
    Streun, M., Baum, G., Blask, W., Rasch, J., Bray, I., Fursa, D., Jones, S., Madison, D., Walters, H. R., and Whelan, C. (1998). Spin dependence of (e, 2e) collisions on lithium at 54.4 eV. Journal of Physics B: Atomic, Molecular and Optical Physics, 31 (19), pp. 4401.
    Rasch, J., and Whelan, C. T. (1997). On the numerical evaluation of a class of integrals occurring in scattering problems. Computer physics communications, 101 (1), pp. 31.
    Rasch, J., Lucey, S., Whelan, C. T., and Walters, H. R. (1997). On the numerical evaluation of six dimensional integrals occurring in scattering problems. Computer physics communications, 101 (3), pp. 197.
    Rasch, J., Whelan, C. T., Allan, R., Lucey, S., Walters,, and J, H. R. (1997). Strong interference effects in the triple differential cross section of neutral-atom targets. Physical Review A, 56 (2), pp. 1379.
    Rasch, J., Zitnik, M., Avaldi, L., Whelan, C. T., Stefani, G., Camilloni, R., Allan, R., and Walters, H. R. (1997). Theoretical and experimental investigation of the triple-differential cross sections for electron-impact ionization of Kr (4p) and Xe (5p) at 1-keV impact energy. Physical Review A, 56 (6), pp. 4644.
    Rioual, S., Rouvellou, B., Pochat, A., Rasch, J., Walters, H. R., Whelan, C. T., and Allan, R. (1997). Triple differential cross sections for the electron-impact ionization of argon and neon. Journal of Physics B: Atomic, Molecular and Optical Physics, 30 (13), pp. L475.
    Dreizler, R., Ast, H., Keller, S., Whelan, C. T., Ancarani, L. U., and Walters, H. R. (1997). Structure of the triply differential cross section in the recoil region in relativistic electron-impact ionization: II. Theoretical analysis. Journal of Physics B: Atomic, Molecular and Optical Physics, 30 (2), pp. L77.
    Lucey, S., Whelan, C. T., Allan, R., and Walters, H. R. (1996). (e, 2e) on hydrogen minus. Journal of Physics B: Atomic, Molecular and Optical Physics, 29 (13), pp. L489.
    Röder, J., Rasch, J., Jung, K., Whelan, C. T., Ehrhardt, H., Allan, R., and Walters, H. R. (1996). Coulomb three-body effects in low-energy impact ionization of H (1s). Physical Review A, 53 (1), pp. 225.
    Whelan, C. T., Rasch, J., Walters, H. R., Keller, S., Ast, H., and Dreizler, R. (1996). Inner shell (e, 2e) processes. Canadian Journal of Physics, 74 (11), pp. 804–810.
    Ast, H., Keller, S., Dreizler, R., Whelan, C. T., Ancarani, L., and Walters, H. R. (1996). On the position of the binary peak in relativistic e, 2e collisions. Journal of Physics B: Atomic, Molecular and Optical Physics, 29 (15), pp. L585.
    Whelan, C. T., Ast, H., Walters, H. R., Keller, S., and Dreizler, R. (1996). Relativistic-energy-sharing (e,2e) collisions in coplanar constant 1,2 geometry. Physical Review A, 53 (5), pp. 3262.
    Keller, S., Dreizler, R., Ast, H., Whelan, C. T., and Walters, H. R. (1996). Theory of (e, 2e) processes with spin-polarized relativistic electrons. Physical Review A, 53 (4), pp. 2295.
    Keller, S., Dreizler, R. M., Ancarani, L. U., Walters, H. R., Ast, H., and Whelan, C. T. (1996). Theoretical analysis of the relativistic first order Born approximation for inner shell (e, 2e) processes. Zeitschrift für Physik D Atoms, Molecules and Clusters, 37 (3), pp. 191.
    Rioual, S., Pochat, A., Gélébart, F., Allan, R., Whelan, C. T., and Walters, H. R. (1995). Low and intermediate energy coplanar symmetric (e, 2e) cross sections for the ionization of neon. Journal of Physics B: Atomic, Molecular and Optical Physics, 28 (24), pp. 5317.
    Whelan, C. T., Ast, H., Keller, S., Walters, H. R., and Dreizler, R. (1995). Triple differential cross sections in energy-sharing symmetric geometry for gold and uranium at relativistic impact energies. Journal of Physics B: Atomic, Molecular and Optical Physics, 28 (2), pp. L33.
    Whelan, C. T., Allan, R., Rasch, J., Walters, H. R., Zhang, X., Röder, J., Jung, K., and Ehrhardt, H. (1994). Coulomb three-body effects in (e, 2e) collisions: The ionization of H in coplanar symmetric geometry. Physical Review A, 50 (5), pp. 4394.
    Ast, H., Keller, S., Whelan, C. T., Walters, H. R., and Dreizler, R. (1994). Electron-impact ionization of the K shell of silver and gold in coplanar asymmetric geometry. Physical Review A, 50 (1), pp. R1.
    Keller, S., and Whelan, C. T. (1994). On the plane wave Born approximation for relativistic (e, 2e) processes. Journal of Physics B: Atomic, Molecular and Optical Physics, 27 (23), pp. L771.
    Keller, S., Whelan, C. T., Ast, H., Walters, H. R., and Dreizler, R. (1994). Relativistic distorted-wave Born calculations for (e, 2e) processes on inner shells of heavy atoms. Physical Review A, 50 (5), pp. 3865.
    Pochat, A., Zhang, X., Whelan, C. T., Walters, H. R., Tweed, R., Gélébart, F., Cherid, M., and Allan, R. (1993). Absolute low-energy experimental cross sections for (e, 2e) processes on helium. Physical Review A, 47 (5), pp. R3483.
    Avaldi, L., Camilloni, R., Multari, R., Stefani, G., Zhang, X., Walters, H. R., and Whelan, C. T. (1993). Coplanar asymmetric (e, 2e) experiments on xenon 4d and 5p orbitals. Physical Review A, 48 (2), pp. 1195.
    Whelan, C. T. (1993). On the evaluation of integrals over three spherical Bessel functions. Journal of Physics B: Atomic, Molecular and Optical Physics, 26 (23), pp. L823.
    Whelan, C. T., Allan, R., and Walters, H. R. (1993). PCI, polarisation and exchange effects in (e, 2e) collisions. Le Journal de Physique IV, 3 (C6), pp. C6–39.
    Whelan, C. T., Walters, H. R., and Dreizler, R. (1993). Some remarks on the use of effective charges in the study of electron impact ionisation processes. Australian journal of physics, 46 (2), pp. 241.
    Zhang, X., Whelan, C. T., Walters, H. R., Allan, R., Bickert, P., Hink, W., and Schönberger, S. (1992). (e, 2e) cross sections for inner-shell ionization of argon and neon. Journal of Physics B: Atomic, Molecular and Optical Physics, 25 (20), pp. 4325.
    Avaldi, L., Camilloni, R., Letardi, P., Stefani, G., McCarthy, I. E., Zhang, X., Walters, H. R., and Whelan, C. T. (1992). Absolute triple differential cross sections for helium at 300 eV. Zeitschrift für Physik D Atoms, Molecules and Clusters, 23 (4), pp. 341.
    Cherid, M., Gélébart, F., Pochat, A., Tweed, R., Zhang, X., Whelan, C. T., and Walters, H. R. (1992). Absolute triple differential cross-section measurements in energy sharing kinematics and a coplanar asymmetric geometry at 100 and 200 eV on He. Zeitschrift für Physik D Atoms, Molecules and Clusters, 23 (4), pp. 347.
    Zhang, X., Whelan, C. T., and Walters, H. R. (1992). Distorted-wave Born approximation calculations of (e, 2e) reactions. Zeitschrift für Physik D Atoms, Molecules and Clusters, 23 (4), pp. 301.
    Zhang, X., Whelan, C., and Walters, H. R. (1992). Electron impact ionization of lithium-spin asymmetry of the triple differential cross section. Journal of Physics B: Atomic, Molecular and Optical Physics, 25 (17), pp. L457.
    Gailitis, M., and Whelan, C. T. (1992). In Memorium Raimond Peterkop. Zeitschrift für Physik D Atoms, Molecules and Clusters, 23 (4), pp. 285.
    Walters, H. R., Ast, H., Whelan, C. T., Dreizler, R., Graf, H., Schröter, C., Bonfert, J., and Nakel, W. (1992). Relativistic (e, 2e) collisions on atomic inner shells in symmetric geometry. Zeitschrift für Physik D Atoms, Molecules and Clusters, 23 (4), pp. 353.
    Zhang, X., Whelan, C. T., and Walters, H. R. (1991). Electron impact ionization of the noble gases in coplanar symmetric geometry over the energy range 100 to 1000 eV. Zeitschrift für Physik D Atoms, Molecules and Clusters, 18 (4), pp. 309.
    Whelan, C. T., Walters, H. R., Hansen, J., and Dreizler, R. (1991). High energy electron impact ionisation of H (1s) in coplanar asymmetric geometry. Australian Journal of Physics, 44 (1), pp. 39.
    Curran, E., Whelan, C. T., and Walters, H. R. (1991). On the electron impact ionization of H (1s) in coplanar asymmetric geometry. Journal of Physics B: Atomic, Molecular and Optical Physics, 24 (2), pp. L19.
    Zhang, X., Whelan, C. T., and Walters, H. R. (1990). (e, 2e) cross sections for ionization of helium in coplanar symmetric geometry. Journal of Physics B: Atomic, Molecular and Optical Physics, 23 (17), pp. L509.
    Whelan, C. T., and Walters, H. R. (1990). A new version of the distorted-wave impulse approximation-application to coplanar symmetric ionization. Journal of Physics B: Atomic, Molecular and Optical Physics, 23 (17), pp. 2989.
    Zhang, X., Whelan, C., and Walters, H. R. (1990). Energy sharing (e, 2e) collisions-ionisation of helium in the perpendicular plane. Journal of Physics B: Atomic, Molecular and Optical Physics, 23 (10), pp. L173.
    Rösel, T., Jung, K., Ehrhardt, H., Zhang, X., Whelan, C. T., and Walters, H. R. (1990). The electron impact ionization of Xe in coplanar symmetric geometry. Journal of Physics B: Atomic, Molecular and Optical Physics, 23 (20), pp. L649.
    Whelan, C. T., Walters, H. R., Hanssen, J., and Dreizler, R. (1989). The electron impact ionisation of H (1s) in coplanar asymmetric geometry. Zeitschrift für Physik D Atoms, Molecules and Clusters, 14 (1), pp. 85-86.
    Burgess, A., and Whelan, C. T. (1987). Betrt-a procedure to evaluate the cross section for electron-hydrogen collisions in the Bethe approximation to the reactance matrix. Computer physics communications, 47 (2-3), pp. 295.
    Whelan, C. T., Mcdowell, M., and Edmunds, P. W. (1987). Electron impact excitation of atomic hydrogen. Journal of Physics B: Atomic and Molecular Physics, 20 (7), pp. 1587.
    Whelan, C. T. (1987). On the use of the Bethe approximation in the treatment of long-range multipole interactions in electron-neutral-atom collisions. Journal of Physics B: Atomic and Molecular Physics, 20 (24), pp. 6641.
    Piraux, B., and Whelan, C. T. (1987). Some remarks on the calculation of Born partial wave integrals., 101 (02), pp. 375.
    Whelan, C. T., and Piraux, B. (1987). The convergence in L of the partial wave expansion for electron-neutral atom collisions. Physics Letters A, 122 (2), pp. 126.
    Moores, D., and Whelan, C. T. (1987). The scattering of slow electrons by lithium atoms; improved cross section estimates for transitions between states with n= 3. Journal of Physics B: Atomic and Molecular Physics, 20 (14), pp. 3531.
    Whelan, C. T. (1986). Cross sections for electron-hydrogen collisions in the Born approximation to the reactance matrix. Journal of Physics B: Atomic and Molecular Physics, 19 (15), pp. 2355.
    Whelan, C. T. (1986). On the Bethe approximation to the reactance matrix. Journal of Physics B: Atomic and Molecular Physics, 19 (15), pp. 2343.
    Whelan, C. T. (1984). On the calculation of cross-sections for electron neutral atom collisions in the Born approximation to the reactance matrix. Mathematical Proceedings of the Cambridge Philosophical Society, 95, pp. 179.
    Whelan, C. T. (1980). Some remarks on the commutation relations for angle-angular momentum variables in quantum mechanics. Journal of Physics A: Mathematical and General, 13 (6), pp. L181.
  • Books

    Whelan, C. T. (2012). Fragmentation Processes: Topics in Atomic and Molecular Physics. Cambridge: Cambridge University Press.
    Whelan, C. T., and Mason, N. J. (2004). Electron Scattering from Atoms, Molecules, Nuclei and Bulk Matter.
    Whelan, C. T., and McGuire, J. H. (2003). From the Atomic to the Nano Scale. American Institute of Physics/ODU.
    Whelan, C. T., and Walters, H. J. (1997). Coincidence Studies of Electron and Photon Impact Ionization. New York, New York: Plenum.
    Whelan, C. T., Walters, H. J., Lahmam-Bennani, A., and Ehrhardt, H. (1993). (e,2e) & related processes. Dordrecht: Kluwer.
    Whelan, C. T., Walters, H. R., Lahmam-Bennani,A, and Ehrhardt,H (1993). Springer Netherlands.
  • Book Chapters

    Kawano, S., Rasch, J., Roche, P. J., and Whelan, C. T. (2005). A Study of Iterative Methods for Integro-Differential Equations of Electron-Atom Scattering.Electron Scattering (pp. 77). Springer US.
    Marchalant, P. J., Whelan, C. T., and Walters, H. R. (2005). Electron Impact Ionization of Atoms with Two Active Target Electrons.Electron Scattering (pp. 217). Springer US.
    Kampp, M., Whelan, C. T., and Walters, H. R. (2005). Inner Shell Electron Impact Ionization of Multi-Charged Ions.Electron Scattering (pp. 69). Springer US.
    Roche, P. J., Kawano, S., Whelan, C. T., Rasch, J., Walters, H. R., Allan, R., Langlois, J., and Tannous, C. (2001). Exact Versus Local Exchange in Distorted-Wave Born Calculations of Electron Impact Ionisation.Many-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces (pp. 81). Springer US.
    Marchalant, P. J., Whelan, C. T., Rasch, J., Walters, H. R., and Madison, D. H. (2001). On the importance of the second order term for double excitation processes of Helium by charged particles.Many-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces (pp. 307). Springer US.
    Kampp, M., Whelan, C. T., Pyper, N., Walters, H. R., Dreizler, R., Ast, H., Keller, S., and Ancarani, L. (2001). On the Influence of Using Dirac-Fock Rather Than Density Functional Potentials in the Relativistic DWBA Approximation.Many-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces (pp. 91). Springer US.
    Rasch, J., Marchalant, P., Whelan, C. T., and Walters, H. R. (2001). The Double Ionisation of Helium by Both Photon and Electron Impact.Many-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces (pp. 231). Springer US.
    Whelan, C. T. (1999). (e, 2e) Processes.New Directions in Atomic Physics (pp. 87–104). Springer US.
    Rasch, J., and Whelan, C. T. (1999). Characteristics of Low Energy (E, 2E) Processes.New Directions in Atomic Physics (pp. 345). Springer US.
    Whelan, C. T. (1999). Inner shell ionization processes.Trends in Atomic and Molecular Physics (pp. 59). Kluwer/Plenum.
    Marchalant, P. J., Rasch, J., Whelan, C. T., and Walters, H. R. (1999). New results for double excitation processes with Helium targets.New Directions in Atomic Physics (pp. 355). Springer US.
    Essex, D., and Whelan, C. T. (1999). On the use of the (e, 2e) technique as a surface probe.New Directions in Atomic Physics (pp. 301–307). Springer US.
    Essex, D., and Whelan, C. T. (1999). Some Remarks on the Scattering of Electrons from a Metallic Surface.New Directions in Atomic Physics (pp. 315). Springer US.
    Pinkás, A., Coplan, M., Moore, J., Jones, S., Madison, D., Rasch, J., Whelan, C. T., Allan, R., and Walters, H. R. (1999). Triple Differential Cross Sections for the Electron Impact Ionization of Helium, Neon and Argon From 0.1 To 1 Kev. Theory and Experiment Compared.New Directions in Atomic Physics (pp. 319). Springer US.
    Rasch, J., Whelan, C. T., Allan, R., and Walters, H. R. (1997). An explanation of the structure observed in out-of-plane symmetric measurements on Helium.Coincidence Studies of Electron and Photon Impact ionization (pp. 185). Springer US.
    Lucey, S., Rasch, J., Whelan, C. T., and Walters, H. R. (1997). Bethe-Ridge Effects in (e,2e) on H− (Using 6Dime).Coincidence Studies of Electron and Photon Impact Ionization (pp. 287). Springer US.
    Ancarani, L., Keller, S., Ast, H., Whelan, C. T., Walters, H. R., and Dreizler, R. (1997). Coulomb Boundary Conditions for Relativistic (e,2e) Processes.Coincidence Studies of Electron and Photon Impact Ionization (pp. 215-219). Boston, MA: Springer US.
    Spivack, O Rath, Rasch, J., Whelan, C. T., Allan, R., and Walters, H. R. (1997). Electron Impact Ionization of Hydrogenic Ions in Asymmetric Geometries.Coincidence Studies of Electron and Photon Impact Ionization (pp. 279–285). Springer US.
    Marchalant, P. J., Whelan, C. T., and Walters, H. R. (1997). Excitation-ionization and excitation-autoionization of helium.Coincidence Studies of Electron and Photon Impact Ionization (pp. 21). Springer US.
    Dreizler, R. M., Whelan, C. T., Walters, H. R., Ast, H., and Keller, S. (1997). Progress Report on Relativistic (e, 2e) Processes.Coincidence Studies of Electron and Photon Impact Ionization (pp. 199). Springer US.
    Besch, K., Kull, T., Sauter, M., Nakel, W., Ast, H., Keller, S., Dreizler, R. M., Whelan, C. T., Ancarani, L. U., and Walters, H. R. (1997). Structure of the Triply Differential Cross Section in the Recoil Region in Relativistic Electron Impact Ionization.Coincidence Studies of Electron and Photon Impact Ionization (pp. 207). Springer US.
    Rasch, J., Whelan, C. T., Allan, R., and Walters, H. R. (1997). The Normalisation of the Experimental Triple Differential Cross Section of Noble Gas Atoms in Extreme Asymmetric Geometry.Coincidence Studies of Electron and Photon Impact Ionization (pp. 305). Springer US.
    Ast, H., Whelan, C. T., Keller, S., Rasch, J., Walters, H. R., and Dreizler, R. (1996). Pauli Blocking In Relativistic (e,2e) Collisions.The Farago Symposium,Selected Topics on Electron Physics (pp. 129). Springer US.
    Whelan, C. T., Allan, R., Walters, H. R., and Zhang, X. (1993). (e, 2e), effective charges, distorted waves and all that!. (pp. 1). Springer Netherlands.
    Walters, H. R., Zhang, X., and Whelan, C. T. (1993). Directions in (e, 2e) and related processes. (pp. 33). Springer Netherlands.
    Zhang, X., Whelan, C. T., and Walters, H. R. (1993). Distorted-Wave Calculations of Triple Differential Cross Section for Inner Shell Ionization.(e, 2e) & Related Processes (pp. 409). Springer Netherlands.
    Whelan, C., Zhang, X., and Walters, H. R. (1992). (e, 2e) processes with noble gas targets.Correlations and polarization in electronic and atomic collisions and (e, 2e) reactions (pp. 149). IOP Conference Series.
  • Conference Proceeding

    Stacy, E., Naginey, T., Pollock, B., Walters, H. R., and Whelan, C. T. (2014). Positronium Formation from positron impact off hydrogen and helium targets. ,APS March Meeting Abstracts (pp. 1202). APS.
    Mc Govern, M., Walters, H. R., and Whelan, C. T. (2013). A coupled pseudostate approach to the calculation of ion??-atom fragmentation processes. ,Fragmentation Processes: Topics in Atomic and Molecular Physics (pp. 289). Cambridge University Press.
    McGovern, M., Assafrao, D., Mohallem, JR, Whelan, C. T., and Walters, H. R. (2010). Coincidence studies with antiprotons. ,Journal of Physics: Conference Series (pp. 012029)
    McGovern, M., Assafrao, D., Mohallem, JR, Whelan, C. T., and Walters, H. R. (2009). Antiproton impact ionization of atomic hydrogen and helium. ,Journal of Physics: Conference Series (pp. 072001)
    McGovern, M., Assafrao, D., Mohallem, J. R., Whelan, C. T., and Walters, H. (2009). Fully differential cross sections for heavy particle impact ionization.. J Phys Con Ser.
    McGovern, M., Assafrao, D., Mohallem, JR, Whelan, C. T., and Walters, H. R. (2009). Ionization of helium by Au24+ and Au53+ projectiles. ,Journal of Physics Conference Series (pp. 082010)
    Godunov, A., Whelan, C. T., and Walters, H. R. (2008). Second-order calculations of the transfer-ionization process: multiple differential cross sections. ,APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts (pp. 5004)
    Lower, J., Bellm, S., Panajotovic, R., Weigold, E., Prideaux, A., Stegen, Z., Madison, D. H., Whelan, C. T., and Lohmann, B. (2006). Ionization of Atoms with Spin Polarized Electrons. ,Correlations,Polarization and Ionization in Atomic Systems (pp. 60). American Institute of Physics (AIP).
    Lower, L., Bellm, S., Panajotovic, R., Weigold, E., Madison, D., Prideaux, A., Whelan, C. T., and Lohmann, B. (2006). Ionization of Atoms with Spin Polarized Electrons in A Lahmam-Bennani and B Lohmann.. AIP. Conference Proceedings.
    Roche, P. J., Nesbet, R. K., and Whelan, C. T. (2005). (y,2e) and (e,2e) using a 2- electron R operator Formalism. (pp. 313-328)
    Schöffler, M., Schmidt-Böcking, H., Schmidt, L. H., Jagutzki, O., Mergel, V., Dörner, R., Titze, J., Khayyat, K., Weber, T., Godunov, A., Whelan, C. T., and Walters, H. J. (2005). Ionization Dynamics in p and p- on Helium collisions in Yasunori Yamazaki. (pp. 89). AIP Conference Proceedings. doi:10.1063/1.2121972
    Schöffler, M., Schmidt-Böcking, H., Schmidt, L. P., Jagutzki, O., Mergel, V., Dörner, R., Titze, J., Khayyat, K., Webber, T., Whelan, C. T., Godunov, A., and Walters, J. (2005). Ionization Dynamics in p and p̄ on Helium collisions. ,Physics with ultra Slow Antiproton Beams (pp. 60). American Institute of Physics (AIP). doi:10.1063/1.2121972
    Chen, Z., Madison, D. H., Whelan, C. T., and Walters, H. R. (2004). At what energies are second order effects important?. ,APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts (pp. 1108)
    Godunov, A., Whelan, C. T., and McGuire, J. M. (2003). Excitation-ionization of helium in high energy collisions. ,AIP Conference Proceedings (pp. 32–35). doi:10.1063/1.1619658
    Chen, Z., Madison, D. H., Whelan, C. T., and Walters, H. R. (2003). Importance of higher order effects in single ionization of hydrogen and helium. ,APS Meeting Abstracts
    Chen, Z., Madison, D., Whelan, C. T., and Walters, H. R. (2003). Second-Order Distorted-wave Calculations for the Electron Impact Ionization of Helium. ,APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
    Haynes, M. A., Lohmann, B., Biava, D., McEachran, R., Whelan, C. T., and Madison, D. H. (2002). Low energy inner valence ionization of the rare gases. ,Correlations, Polarization and Ionization in Atomic System (pp. 18)
    Kampp, M., Pyper, N., Walters, H. R., and Whelan, C. T. (2002). Relativistic (e, 2e) Processes. ,APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts (pp. 5001). APS.
    Kampp, M., Pyper, N., and Whelan, C. T. (2002). The role of final state potentials in the distorted-wave Born approximation calculation of inner-shell ionization processes. ,Proceedings of the International Symposium on (e, 2e), Double Photoionization and Related Topics and the Eleventh International Symposium on Polarization and Correlation in Electronic and Atomic Systems (pp. 286–290)
    Whelan, C. T. (2000). Fragmentation Processes in Atomic Collision Physics. ,APS Meeting Abstracts (pp. 10002)
    Whelan, C. T. (2000). Recent advances in our understanding of (e, 2e) processes. ,The Physics of electronic and atomic collisions: XXI International Conference (pp. 241)
    Rasch, J., Whelan, C. T., Lucey, S., and Walters, H. R. (1999). Application of 6DIME:(γ, 2e) on He. ,High-Performance Computing (pp. 285-291). Boston, MA: Springer. doi:10.1007/978-1-4615-4873-7_30
    Rasch, J., and Whelan, C. T. (1999). Partial wave integrals. ,High-Performance Computing (pp. 301–305)
    Rasch, J., and Whelan, C. T. (1999). Three body effects in low energy (e, 2e) processes. ,The fifteenth international conference on the application of accelerators in research and industry (pp. 118–121)
    Essex, D. W., Pyper, N., and Whelan, C. T. (1999). Calculations of the He Is2Is2p energy shift observed in STEM experiments on helium bubbles in irradiated materials. ,Electron Microscopy and Analysis 1999 (pp. 187). Institute of Physics Electron Microscopy and Analysis Group Conference, University of Sheffield.
    Lucey, S., Rasch, J., Whelan, C. T., and Walters, H. R. (1997). Aspects of (e, 2e): 6 Dimensional Integral Method. ,American Institute of Physics Conference Series (pp. 205–208). American Institute of Physics.
    I, S., and Whelan, C. T. (1988). The Born approximation to the reactance matrix in low energy electron molecule collisions. ,RIKEN Acc Report (pp. 47). RIKEN Laboratory,Tokyo.
    Mcdowell, M., and Whelan, C. T. (1986). Electron impact excitation of atomic hydrogen. ,Low Energy Collision Theory Techniques for Atomic Excitation and Radiative Data (pp. 15). Daresbury Laboratory.
  • Presentations

    Whelan, C. T. (2015). International Symposium of Ion-Atom Collisions presented at 24th International Symposium of Ion-Atom Collisions Barcelona, Spain.
    Whelan, C. T. (June, 2014). The Helium Bubble Problem U K Daresbury Laboratory at the SUPERSTEM Consortium meeting.
    Whelan, C. T. (May, 2014). Electron Microscopy and Coincidence Spectroscopy of Atomic States University of Oxford.
    Whelan, C. T. (July, 2011). presented at 22nd International Symposium on Ion-Atom Collisions Caen, France.
    Whelan, C. T. (2008). Applications of Accelerators in Research and Industry presented at CEPAS Forth Worth, Texas.
    Whelan, C. T. (2008). Elementary Processes in Atomic Systems presented at CEPAS Cluj Romania.
    Whelan, C. T. (2007). Ion-Atom Collisions presented at 20th International Symposium Agios Nikolaos, Crete, Greece.
    Whelan, C. T. (2007). Atomic Physics in Strong Fields presented at SPARC Theory Group Meeting GSI Darmstad, Germany.
    Whelan, C. T. (2006). Application of Accelerators in Research and Industry presented at International Meeting Forth Worth, Texas.
    Whelan, C. T. (2005). presented at American Physics Society Tamps, Florida.
  • 1996 Co-Chair, Euro-Conference
  • 1996 Visiting Professor, Universite de Metz, France
  • 1997 Visiting Fellow, Institute for Theoretical Atomic and Molecular Physics, Harvard Unviersity
  • 1998 Chair EU Funded meeting
  • 2000 Elected a Fellow of the American Physical Society
  • 2000 Funow Foundation Lecturer, Yamanashi University, Kufu, Japan
  • 2000 Visiting Professor, Tohoku Univesity, Sendai, Japan
  • 2001 Chair Euro-Physics Conference
  • 2001 Elected a Fellow of the Institute of Physics
  • 2002 Chair International Meeting, Atomic to the Nanoscale
  • 2002 Doctorate of Science (Sc.D) award, University of Cambridge
  • 2003 named an Eminent Scholar by my University
  • 2015: 2015 Chiense Academy of Science Presidential Visiting Scientist Award
  • 2015: 2015 Chiense Academy of Sciences President’s International Fellowship Award
  • 2014: Pi UK Royal Society Collaborative grant , University of Oxford
  • 2007: Chair, 21st International Symposium on Ion-atom Collisions
  • 2006: 2006-2008 International Fellow at the Queen's University, Belfast
  • 2005: 2005 Chair sequence of the APS, Few Body Topical Group
  • 2004: 2004 Chair sequence of the APS, Few Body Topical Group
  • 2003: 2003 Chair sequence of the APS, Few Body Topical Group
  • 2003: 2003-2006 Member fo Jefferson Laboratory Committee, Southern Universities Research Association (SURA)
  • 2001: 2001-2002 DFG Mercator Professor, University of Frankfurt am Main
  • 2001: 2001-2004 Honorary Senior Research Associate, University of Cambridge
  • 1997: 1997-1999 Visiting Professor, Universite de Bretagne Occidentale, Brest,France
  • 1995: 1995-1998 Project Coordinator NATO Collaborative Research Grant, NATO Collaborative Research Grant
  • 1995: 1995-1998 Project Coordinator on Royal Society Grant, linking Cambridge and Moscow State University
  • 1993: 1993-1996 Contractor of EEC Network, Ionization and Coincidence Spectroscopies
  • 1992: 1992-1994 Project Co-ordinator, NATO Collaborative Research Grant
  • 1992: 1992-2001 Fellow, Magdalene College, Cambridge