Selected Publications

Articles In Academic Journals

Year Title
2015 A coincidence study of electron and positron impact ionization of Ar (3p) at 1 keVThe European Physical Journal D. 235.
2015 Differential ionization of a one-electron target under bare-ion impact: Application to proton-impact ionization of atomic hydrogenPhysical Review A. 062712.
2015 Energy-sharing (e, 2 e) collisions: Ionization of the inert gases in the perpendicular planePhysical Review A. 012706.
2014 Differential ionization of Li (2 s) and Li (2 p) under proton and O 8+ impactPhysical Review A. 032709.
2014 Estimating positronium formation for plasma applicationsPhys Rev A. 062704.
2014 Positronium formation from positron impact on hydrogen and helium targetsPhys Rev A. 012708.
2013 Spin resolved atomic (e,2e) processesFragmentation Processes: Topics in Atomic and Molecular Physics. 263.
2012 Ionization of He by C 6+, C 6-, e-, and e+Physical Review A. 062701.
2011 On the contributon of doubly excited ionic states to the properties of hot dense plasmasHigh Energy Density Physics. 371-376.
2010 C 6+-impact ionization of helium in the perpendicular plane: ionization to the ground state, excitation-ionization, and relativistic effectsPhysical Review A. 032702.
2010 C??ionization of helium in the perpendicular plane:ionization to the ground state, excitation-ionization and relativistic effectsPhys Rev A. 032702.
2010 Coincidence studies of He ionized by C??,Au²?and Au??³?Phys Rev A. 14.
2010 Pseudostate methods and differential cross sections for antiproton ionization of atomic hydrogen and heliumPhysical Review A. 032708.
2009 Differential and total cross section for antiproton impact ionization of atomic hydrogen and heliumPhys Rev A. 18.
2008 Coincidence studies of electron impact ionization of atomic inner shellsEur Phys J.D. 409-411.
2008 Effect of angular electron correlation in He: Second-order calculations for transfer ionizationPhysical Review A. 012714 (5 pages).
2008 Mg 2 p ionization by electron impactPhysical Review A. 054704.
2008 The electron impact ionization of one and two electron atoms and ions close to the ionization thresholdJ Phys B. 8.
2008 The ionization of Mg by electron impact at 1000 eV studied by (e,2e) experimentsJ Phys B. 7.
2007 An (e,2d)-(e,3e) investigation of argon, competion between inner shell ionization and direct double ionization processesJournal of Physics B: Atomic, Molecular and Optical Physics. 2871-2884.
2007 Angular correlations between scattered ejected and Auger electrons from ionisation of Argon, investigated by means of (e,2e) and /or(e,3e) coincidence experimentsJournal of Electron Spectroscopy. 27-30.
2007 Coincidence Studies of Ionization ProcessesNuc Inst and Meth B. 222-225.
2007 Ground state correlation and dynamical processes in fAst ion-helium-collisionsVerhandlungen der Deutschen Physikalischen Gesellschaft.
2007 New coplanar (e, 2e) experiments for the ionisation of He and Ar atomsJournal of Electron Spectroscopy and Related Phenomena. 27-30.
2007 On the extension of (e, 2e) theory to coincidence studies of ion–atom collisionsNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 222-225.
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. 6-10.
2007 X 2e: A general quantitative approach to the calculation of (e, 2e) and related processesJournal of Electron Spectroscopy and Related Phenomena. 67-72.
2006 Spin Asymmetries in the electron-impact ionization of Ar(2p)J Phys B. 4759-4766.
2006 Total cross sections for transfer-ionization in fast ion-helium collisionsJ Physics B. 985-996.
2005 Atomic and molecular collisions and interactions-Symmetry properties of the S matrix in a fully relativistic distorted-wave treatment of electron-impact ionizationPhysical Review-Section A-Atomic Molecular and Optical Physics. 52701-52701.
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 directionPhysical Review-Section A-Atomic Molecular and Optical Physics. 52712-52712.
2005 Many-particle fragmentation processes in atomic and molecular physics - new insight into the world of correlationsNuclear Instruments and Methoda B. 3-11.
2005 Many-particle fragmentation processes in atomic and molecular physics–new insight into the world of correlationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 3-11.
2005 Revealing the effect of angular correlation in the ground stateJ Phys B.
2005 Revealing the effect of angular correlation in the ground-state He wavefunction: a coincidence study of the transfer ionization processJournal of Physics B: Atomic, Molecular and Optical Physics. L123.
2005 Symmetry properties of the S matrix in a fully relativistic distorted-wave treatment of electron-impact ionizationPhys Rev A.
2005 Transfer ionization process p + He-> H?+ He² + e? with the ejected electron detected in the plane perpendicular to the incident beam directionPhys Rev A.
2004 Fully differential cross sections for transfer ionization? sensitive probe of high level correlation effects in atomsJournal of Physics B: Atomic, Molecular and Optical Physics. L201.
2004 On the observation of the fine structure effect in non-relativistic (e, 2e) processesThe European Physical Journal D-Atomic, Molecular, Optical and Plasma Physics. 17-19.
2004 Second-order distorted wave calculation for electron impact ionization of hydrogenJournal of Physics B: Atomic, Molecular and Optical Physics. 981.
2003 Spin asymmetries in spatially resolved processes of ionization of heavy atoms by relativistic electronsPhysical Review-Section A-Atomic Molecular and Optical Physics. 44702-45200.
2002 Exchange effects in low energy electron impact ionization of the inner and outer shells of argonJournal of Physics B: Atomic, Molecular and Optical Physics. 293.
2002 On the electron impact ionization of multi-charged ions: a theoretical investigation of relativistic effectsJournal of Physics B: Atomic, Molecular and Optical Physics. 3923.
2002 The electron impact ionization of magnesium (2p)Journal of Physics B: Atomic, Molecular and Optical Physics. 2325.
2001 The $1s21s2p (1P)$ excitation energy for helium atoms in liquid helium, solid helium and helium bubbles in metals!!!Philosophical Magazine B. 91.
2000 Excitation-ionization of helium to He+ (n= 2) at 365.8 eVJournal of Physics B: Atomic, Molecular and Optical Physics. L749.
1999 (e, 2e) ionization of the 2p orbital of argonJournal of Physics B: Atomic, Molecular and Optical Physics. L5.
1999 Analysis of semi-relativistic approximations for relativistic (e, 2e) experimentsJournal de Physique-Colloques. 225-228.
1999 Experimental and theoretical determination of the triple differential cross section for Kr (4 p) electron-impact ionizationPhysical Review A. 2977.
1999 First and second Born calculations of (e, 2e) excitation-ionization of heliumJournal of Physics B: Atomic, Molecular and Optical Physics. L705.
1999 Fragmentation Processes in Atomic CollisionsScience. 2457.
1999 Interpretation of relativistic (e, 2e) experiments in coplanar asymmetric geometry: Atomic-number-dependent effectsPhysical Review A. 1284.
1999 Limitations of the dipole approximation in calculations for the scanning transmission electron microscopeUltramicroscopy. 183.
1999 On the use of analytic ansatz three–body wave functions in the study of (e, 2e) band related processes.  349-383.
1999 Relativistic (e, 2e) processesPhysics Reports. 409-471.
1998 Coulomb three-body effects in electron-impact ionization of argonPhysical Review A. 3621.
1998 Gauge discrepancies in calculations of on heliumJournal of Physics B: Atomic, Molecular and Optical Physics. 1237.
1998 Influence of Coulomb boundary conditions for (e, 2e) processes on the K-shell of high-Z atomsJournal of Physics B: Atomic, Molecular and Optical Physics. 609.
1998 Remark on the theory of three-body effects in relativistic (e, 2e) processesJournal of Physics B: Atomic, Molecular and Optical Physics. L873.
1998 Second-order effects in (e, 2e) excitation-ionization of helium to (n= 2)Journal of Physics B: Atomic, Molecular and Optical Physics. 1141.
1998 processes with positive-ion targets in coplanar symmetric geometryJournal of Physics B: Atomic, Molecular and Optical Physics. 845.
1997 On the numerical evaluation of a class of integrals occurring in scattering problemsComputer Physics Communications. 31.
1997 On the numerical evaluation of six dimensional integrals occurring in scattering problemsComputer Physics Communications. 197.
1997 Strong interference effects in the triple differential cross section of neutral-atom targetsPhysical Review A. 1379.
1997 Structure of the triply differential cross section in the recoil region in relativistic electron-impact ionization: II. Theoretical analysisJournal of Physics B: Atomic, Molecular and Optical Physics. L77.
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 energyPhysical Review A. 4644.
1997 Triple differential cross sections for the electron-impact ionization of argon and neonJournal of Physics B: Atomic, Molecular and Optical Physics. L475.
1996 (e, 2e) on hydrogen minusJournal of Physics B: Atomic, Molecular and Optical Physics. L489.
1996 Coulomb three-body effects in low-energy impact ionization of H (1s)Physical Review A. 225.
1996 Inner shell (e, 2e) processesCanadian Journal of Physics. 804-810.
1996 On the position of the binary peak in relativistic e, 2e collisionsJournal of Physics B: Atomic, Molecular and Optical Physics. L585.
1996 Relativistic-energy-sharing (e,2e) collisions in coplanar constant 1,2 geometryPhysical Review A. 3262.
1996 Theoretical analysis of the relativistic first order Born approximation for inner shell (e, 2e) processesZeitschrift für Physik D Atoms, Molecules and Clusters. 191.
1996 Theory of (e, 2e) processes with spin-polarized relativistic electronsPhysical Review A. 2295.
1995 Low and intermediate energy coplanar symmetric (e, 2e) cross sections for the ionization of neonJournal of Physics B: Atomic, Molecular and Optical Physics. 5317.
1995 Triple differential cross sections in energy-sharing symmetric geometry for gold and uranium at relativistic impact energiesJournal of Physics B: Atomic, Molecular and Optical Physics. L33.
1994 Coulomb three-body effects in (e, 2e) collisions: The ionization of H in coplanar symmetric geometryPhysical Review A. 4394.
1994 Electron-impact ionization of the K shell of silver and gold in coplanar asymmetric geometryPhysical Review A. R1.
1994 On the plane wave Born approximation for relativistic (e, 2e) processesJournal of Physics B: Atomic, Molecular and Optical Physics. L771.
1994 Relativistic distorted-wave Born calculations for (e, 2e) processes on inner shells of heavy atomsPhysical Review A. 3865.
1993 Absolute low-energy experimental cross sections for (e, 2e) processes on heliumPhysical Review A. R3483.
1993 Coplanar asymmetric (e, 2e) experiments on xenon 4d and 5p orbitalsPhysical Review A. 1195.
1993 On the evaluation of integrals over three spherical Bessel functionsJournal of Physics B: Atomic, Molecular and Optical Physics. L823.
1993 PCI, polarisation and exchange effects in (e, 2e) collisionsLe Journal de Physique IV. C6-39.
1993 Some remarks on the use of effective charges in the study of electron impact ionisation processesAustralian journal of physics. 241.
1992 (e, 2e) cross sections for inner-shell ionization of argon and neonJournal of Physics B: Atomic, Molecular and Optical Physics. 4325.
1992 Absolute triple differential cross sections for helium at 300 eVZeitschrift für Physik D Atoms, Molecules and Clusters. 341.
1992 Absolute triple differential cross-section measurements in energy sharing kinematics and a coplanar asymmetric geometry at 100 and 200 eV on HeZeitschrift für Physik D Atoms, Molecules and Clusters. 347.
1992 Distorted-wave Born approximation calculations of (e, 2e) reactionsZeitschrift für Physik D Atoms, Molecules and Clusters. 301.
1992 In Memorium Raimond PeterkopZeitschrift für Physik D Atoms, Molecules and Clusters. 285.
1992 Relativistic (e, 2e) collisions on atomic inner shells in symmetric geometryZeitschrift für Physik D Atoms, Molecules and Clusters. 353.
1991 Electron impact ionization of the noble gases in coplanar symmetric geometry over the energy range 100 to 1000 eVZeitschrift für Physik D Atoms, Molecules and Clusters. 309.
1991 High energy electron impact ionisation of H (1s) in coplanar asymmetric geometryAustralian journal of physics. 39.
1991 On the electron impact ionization of H (1s) in coplanar asymmetric geometryJournal of Physics B: Atomic, Molecular and Optical Physics. L19.
1990 (e, 2e) cross sections for ionization of helium in coplanar symmetric geometryJournal of Physics B: Atomic, Molecular and Optical Physics. L509.
1990 A new version of the distorted-wave impulse approximation-application to coplanar symmetric ionizationJournal of Physics B: Atomic, Molecular and Optical Physics. 2989.
1990 The electron impact ionization of Xe in coplanar symmetric geometryJournal of Physics B: Atomic, Molecular and Optical Physics. L649.
1989 The electron impact ionisation of H (1s) in coplanar asymmetric geometryZeitschrift für Physik D Atoms, Molecules and Clusters. 85-86.
1987 Betrt-a procedure to evaluate the cross section for electron-hydrogen collisions in the Bethe approximation to the reactance matrixComputer Physics Communications. 295.
1987 Electron impact excitation of atomic hydrogenJournal of Physics B: Atomic and Molecular Physics. 1587.
1987 On the use of the Bethe approximation in the treatment of long-range multipole interactions in electron-neutral-atom collisionsJournal of Physics B: Atomic and Molecular Physics. 6641.
1987 Some remarks on the calculation of Born partial wave integrals.  375.
1987 The convergence in L of the partial wave expansion for electron-neutral atom collisionsPhysics Letters A. 126.
1987 The scattering of slow electrons by lithium atoms; improved cross section estimates for transitions between states with n= 3Journal of Physics B: Atomic and Molecular Physics. 3531.
1986 Cross sections for electron-hydrogen collisions in the Born approximation to the reactance matrixJournal of Physics B: Atomic and Molecular Physics. 2355.
1986 On the Bethe approximation to the reactance matrixJournal of Physics B: Atomic and Molecular Physics. 2343.
1984 On the calculation of cross-sections for electron neutral atom collisions in the Born approximation to the reactance matrixMathematical Proceedings of the Cambridge Philosophical Society. 179.
1980 Some remarks on the commutation relations for angle-angular momentum variables in quantum mechanicsJournal of Physics A: Mathematical and General. L181.

Books

Year Title
2012 Fragmentation Processes: Topics in Atomic and Molecular Physics.  Cambridge: Cambridge University Press.
2004 Electron Scattering from Atoms, Molecules, Nuclei and Bulk Matter
2003 From the Atomic to the Nano Scale.  American Institute of Physics/ODU.
1997 Coincidence Studies of Electron and Photon Impact Ionization.  New York: Plenum.
1993 (e,2e) & related processes.  Dordrecht: Kluwer.

Chapters

Year Title
2005 A Study of Iterative Methods for Integro-Differential Equations of Electron-Atom ScatteringElectron Scattering. Springer US.
2005 Electron Impact Ionization of Atoms with Two Active Target ElectronsElectron Scattering. Springer US.
2005 Inner Shell Electron Impact Ionization of Multi-Charged IonsElectron Scattering. Springer US.
2001 Exact Versus Local Exchange in Distorted-Wave Born Calculations of Electron Impact IonisationMany-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces. Springer US.
2001 On the Influence of Using Dirac-Fock Rather Than Density Functional Potentials in the Relativistic DWBA ApproximationMany-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces. Springer US.
2001 On the importance of the second order term for double excitation processes of Helium by charged particlesMany-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces. Springer US.
2001 The Double Ionisation of Helium by Both Photon and Electron ImpactMany-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces. Springer US.
1999 (e, 2e) ProcessesNew Directions in Atomic Physics. Springer US.
1999 Characteristics of Low Energy (E, 2E) ProcessesNew Directions in Atomic Physics. Springer US.
1999 Inner shell ionization processesTrends in Atomic and Molecular Physics. Kluwer/Plenum.
1999 New results for double excitation processes with Helium targetsNew Directions in Atomic Physics. Springer US.
1999 On the use of the (e, 2e) technique as a surface probeNew Directions in Atomic Physics. Springer US.
1999 Some Remarks on the Scattering of Electrons from a Metallic SurfaceNew Directions in Atomic Physics. Springer US.
1999 Triple Differential Cross Sections for the Electron Impact Ionization of Helium, Neon and Argon From 0.1 To 1 Kev. Theory and Experiment ComparedNew Directions in Atomic Physics. Springer US.
1997 An explanation of the structure observed in out-of-plane symmetric measurements on HeliumCoincidence Studies of Electron and Photon Impact ionization. Springer US.
1997 Bethe-Ridge Effects in (e,2e) on H? (Using 6Dime)Coincidence Studies of Electron and Photon Impact Ionization. Springer US.
1997 Coulomb Boundary Conditions for Relativistic (e,2e) ProcessesCoincidence Studies of Electron and Photon Impact Ionization. Springer US.
1997 Electron Impact Ionization of Hydrogenic Ions in Asymmetric GeometriesCoincidence Studies of Electron and Photon Impact Ionization. Springer US.
1997 Excitation-ionization and excitation-autoionization of heliumCoincidence Studies of Electron and Photon Impact Ionization. Springer US.
1997 Progress Report on Relativistic (e, 2e) ProcessesCoincidence Studies of Electron and Photon Impact Ionization. Springer US.
1997 Structure of the Triply Differential Cross Section in the Recoil Region in Relativistic Electron Impact IonizationCoincidence Studies of Electron and Photon Impact Ionization. Springer US.
1997 The Normalisation of the Experimental Triple Differential Cross Section of Noble Gas Atoms in Extreme Asymmetric GeometryCoincidence Studies of Electron and Photon Impact Ionization. Springer US.
1996 Pauli Blocking In Relativistic (e,2e) CollisionsThe Farago Symposium,Selected Topics on Electron Physics. Springer US.
1993 Distorted-Wave Calculations of Triple Differential Cross Section for Inner Shell Ionization(e, 2e) & Related Processes. Dordrecht: Springer Netherlands.

Conference Papers

Year Title
2014 Positronium Formation from positron impact off hydrogen and helium targets.  1202.
2013 A coupled pseudostate approach to the calculation of ion??-atom fragmentation processes.  289.
2010 Coincidence studies with antiprotons.  012029.
2009 Antiproton impact ionization of atomic hydrogen and helium.  072001.
2009 Fully differential cross sections for heavy particle impact ionization
2009 Ionization of helium by Au24+ and Au53+ projectiles.  082010.
2008 Second-order calculations of the transfer-ionization process: multiple differential cross sections.  5004.
2006 Ionization of Atoms with Spin Polarized Electrons.  60.
2006 Ionization of Atoms with Spin Polarized Electrons in A Lahmam-Bennani and B Lohmann
2005 (y,2e) and (e,2e) using a 2- electron R operator Formalism.  313-328.
2005 Ionization Dynamics in p and p- on Helium collisions in Yasunori Yamazaki
2005 Ionization Dynamics in p and p? on Helium collisions.  60.
2004 At what energies are second order effects important?.  1108.
2003 Excitation-ionization of helium in high energy collisions.  32-35.
2003 Importance of higher order effects in single ionization of hydrogen and helium
2003 Second-Order Distorted-wave Calculations for the Electron Impact Ionization of Helium
2002 Low energy inner valence ionization of the rare gases.  18.
2002 Relativistic (e, 2e) Processes.  5001.
2002 The role of final state potentials in the distorted-wave Born approximation calculation of inner-shell ionization processes.  286-290.
2000 Fragmentation Processes in Atomic Collision Physics.  10002.
2000 Recent advances in our understanding of (e, 2e) processes.  241.
1999 Application of 6DIME:(?, 2e) on He.  285-291.
1999 Calculations of the He Is2Is2p energy shift observed in STEM experiments on helium bubbles in irradiated materials.  187.
1999 Partial wave integrals.  301-305.
1999 Three body effects in low energy (e, 2e) processes.  118-121.
1997 Aspects of (e, 2e): 6 Dimensional Integral Method.  205-208.
1988 The Born approximation to the reactance matrix in low energy electron molecule collisions.  47.
1986 Electron impact excitation of atomic hydrogen.  15.

Education And Training

  • Sc.D. in Theoretical Physics, University of Cambridge 2003
  • Ph.D. in Theoretical Physics, University of Cambridge 1985
  • M.Sc. in Mathematical Physics, National University Of Ireland 1979
  • B.S. in Mathematical Science, National University Of Ireland 1977
  • Full Name

  • Colm Whelan