Publications

2018

  1. A. C. K. Leung and T. Kirchner, Lyman line ratios in charge-exchange collisions of C6+ and O8+ ions with hydrogen and krypton atoms, Phys. Rev. A 97, 062705
  2. H. J. Lüdde, M. Horbatsch, and T. Kirchner, A screened independent atom model for the description of ion collisions from atomic and molecular clusters, Eur. Phys. J. B 91, 99

2017

  1. M. Baxter, T. Kirchner, and E. Engel, Time-dependent spin-density-functional-theory description of He+-He collisions, Phys. Rev. A 96, 032708
  2. A. C. Vutha, T. Kirchner, and P. Dube, Collisional frequency shift of a trapped-ion optical clock, Phys. Rev. A 96, 022704
  3. A. C. K. Leung and T. Kirchner, Radiative-emission analysis in charge-exchange collisions of O6+ with argon, water, and methane, Phys. Rev. A 95, 042703
  4. A. Salehzadeh and T. Kirchner, Fragmentation of methane molecules by proton and antiproton impact, Eur. Phys. J. D 71, 66

2016

  1. H.-K. Chung, B. J. Braams, K. Bartschat, A. G. Csaszar, G. W. F. Drake, T. Kirchner, V. Kokoouline, and J. Tennyson, Uncertainty estimates for theoretical atomic and molecular data , J. Phys. D 49, 363002
  2. H. J. Lüdde, A. Achenbach, T. Kalkbrenner, H.-C. Jankowiak, and T. Kirchner, An independent-atom-model description of ion-molecule collisions including geometric screening corrections, Eur. Phys. J. D 70, 82
  3. A. C. K. Leung and T. Kirchner, Analysis of x-ray emission spectra in charge-exchange collisions of C6+ with He and H2, Phys. Rev. A 93, 052710
  4. H. Luna, W. Wolff, E. C. Montenegro, A. C. Tavares, H. J. Lüdde, G. Schenk, M. Horbatsch, and T. Kirchner, Ionization and electron-capture cross sections for single- and multiple-electron removal from H2O by Li3+ impact, Phys. Rev. A 93 052705
  5. M. D. Spiewanowski, L. Gulyas, M. Horbatsch, and T. Kirchner, Doubly-differential cross section calculations for K-shell vacancy production in lithium by fast O8+ ion impact, Phys. Rev. A 93, 012707
  6. M. Baxter and T. Kirchner, Time-dependent density-functional-theory studies of collisions involving He atoms: extension of an adiabatic correlation-integral model, Phys. Rev. A 93, 012502

2015

  1. M. D. Spiewanowski, L. Gulyas, M. Horbatsch, J. Goullon, N. Ferreira, R. Hubele, V. L. B. de Jesus, H. Lindenblatt, K. Schneider, M. Schulz, M. Schuricke, Z. Song, S. Zhang, D. Fischer, and T. Kirchner, Target electron ionization in Li2+-Li collisions: A multi-electron perspective, J. Phys.: Conference Series 601, 012010
  2. A. Salehzadeh and T. Kirchner, Electron removal processes in proton-methane collisions, Phys. Procedia 66, 16
  3. G. Schenk and T. Kirchner, Bare- and dressed-ion impact collisions from neon atoms studied within a nonperturbative mean-field approach, Phys. Procedia 66, 22
  4. G. Schenk and T. Kirchner, Multiple ionization of neon atoms in collisions with bare and dressed ions: A mean-field description considering target response, Phys. Rev. A 91, 052712
  5. A. C. K. Leung and T. Kirchner, An independent electron analysis of the x-ray spectra from single electron capture in Ne10+ collisions from He, Ne, and Ar atoms, Phys. Rev. A 92, 032712

2014

  1. L. Gulyas, S. Egri, and T. Kirchner, Differential cross sections for single ionization of Li in collisions with fast protons and O8+ ions, Phys. Rev. A 90, 062710
  2. T. Kirchner, N. Khazai, and L. Gulyas, Role of two-electron excitation-ionization processes in the ionization of lithium atoms by fast ion impact, Phys. Rev. A 89, 062702

2013

  1. G. Schenk, M. Horbatsch, and T. Kirchner, Role of projectile electrons for target-recoil-charge-state production in intermediate-energy B2+-Ne collisions, Phys. Rev. A 88, 012712
  2. M. Baxter and T. Kirchner, Correlation in time-dependent density-functional-theory studies of antiproton-helium collisions, Phys. Rev. A 87, 062507
  3. A. Salehzadeh and T. Kirchner, Strong multiple-capture effect in slow Ar17+-Ar collisions: a quantum mechanical analysis, J. Phys. B 46, 025201
  4. M. Schulz, A. L. Harris, T. Kirchner, and D. H. Madison, Electron capture processes in ion-atom collisions at intermediate projectile energies, in: Interdisciplinary Research on Particle Collisions and Quantitative Spectroscopy , Vol. 1: Fast Ion-Atom and Ion-Molecule Collisions, ed. by Dz. Belkic, (World Scientific Publishing, Singapore 2013)
  5. T. Kirchner, M. Zapukhlyak, M. F. Ciappina, and M. Schulz, Recent advances in the theory and the modelling of multiple processes in heavy-particle collisions, in: Interdisciplinary Research on Particle Collisions and Quantitative Spectroscopy, Vol. 1: Fast Ion-Atom and Ion-Molecule Collisions, ed. by Dz. Belkic, (World Scientific Publishing, Singapore 2013)
  6. T. Kirchner, M. Murakami, M. Horbatsch, and H. J. Lüdde, Ion collisions with water molecules: a time-dependent density functional theory approach, in: Advances in Quantum Chemistry, Vol. 65: Theory of Heavy Ion Collision Physics in Hadron Therapy, ed. by Dz. Belkic, (Elsevier, Amsterdam 2013)

2012

  1. T. Kirchner, M. Murakami, M. Horbatsch, and H. J. Lüdde, Calculations for charge transfer and ionization in heavy-particle collisions from water molecules, J. Phys.: Conference Series 388, 012038
  2. M. Murakami, T. Kirchner, M. Horbatsch, and H. J. Lüdde, Quantum-mechanical calculation of multiple electron removal and fragmentation cross sections in He+-H2O collisions, Phys. Rev. A 86, 022719
  3. L. Gulyas, A. Igarashi, and T. Kirchner, Double and transfer ionization in collisions of He with bare ions, Phys. Rev. A 86, 024701
  4. K. Kato, D. W. Fitzakerley, M. C. George, A. C. Vutha, M. Weel, C. H. Storry, T. Kirchner, and E. A. Hessels, Selective detection of metastable helium atoms by elastic scattering collisions, Phys. Rev. A 86, 014702
  5. M. Murakami, T. Kirchner, and M. Horbatsch, A reduced-geometry independent particle model calculation of high harmonic generation from closed-shell diatomic molecules, Can. J. Phys. 90, 537
  6. M. Murakami, T. Kirchner, M. Horbatsch, and H. J. Lüdde, Fragmentation of water molecules by proton impact: the role of multiple electron processes, Phys. Rev. A 85, 052713
  7. M. Murakami, T. Kirchner, M. Horbatsch, and H. J. Lüdde, Single and multiple electron removal processes in proton-water vapor collisions, Phys. Rev. A 85, 052704
  8. M. F. Ciappina and T. Kirchner, SymbMat: Symbolic computation of quantum transition matrix elements, Comput. Phys. Comm. 183, 1832
  9. L. Gulyas, A. Igarashi, and T. Kirchner, Projectile scattering in one- and two-electron transitions, J. Phys. B 45, 085205

2011

  1. M. F. Ciappina, T. Kirchner, and M. Schulz, Double ionization of helium by highly-charged ion impact analyzed within the frozen-correlation approximation, Phys. Rev. A 84, 034701
  2. T. Kirchner and H. Knudsen, Current status of antiproton impact ionization of atoms and molecules: theoretical and experimental perspectives, J. Phys. B 44, 122001

2010

  1. M. F. Ciappina, M. Schulz, and T. Kirchner, Reaction dynamics in double ionization of helium by electron impact, Phys. Rev. A 82, 062701
  2. L. Gulyas, L. Sarkadi, A. Igarashi, and T. Kirchner, Two-electron cusp in the double ionization of helium, Phys. Rev. A 82, 032705
  3. M. F. Ciappina, T. Kirchner, M. Schulz, D. Fischer, R. Moshammer, and J. Ullrich, Distorted wave theories applied to double ionization by ion impact: simulation of higher-order processes, Journal of Atomic, Molecular, and Optical Physics 2010, 231329
  4. M. Zapukhlyak, N. Henkel, and T. Kirchner, Projectile scattering and electron-electron interaction in ion-atom collisions, J. Phys.: Conference Series 212, 012030
  5. D. Röhrbein, T. Kirchner, and S. Fritzsche, Role of cascade and Auger effects in the enhanced population of the C3+(1s2s2p 4P) states following single-electron capture in C4+(1s2s 3S)-He collisions, Phys. Rev. A 81, 042701
  6. M. F. Ciappina, T. Kirchner, and M. Schulz, Monte Carlo event generators in atomic collisions: a new tool to tackle the few-body dynamics, Comput. Phys. Communications 181, 813

2009

  1. H. J. Lüdde, T. Spranger, M. Horbatsch, and T. Kirchner, Nonperturbative, quantum-mechanical approach to ion collisions from molecular targets, Phys. Rev. A 80, 060702(R)
  2. M. Zapukhlyak and T. Kirchner, Projectile angular-differential cross sections for electron transfer processes in ion-helium collisions: Evidence for the applicability of the independent electron model, Phys. Rev. A 80, 062705
  3. D. Fischer, M. Schulz, K. Schneider, M. F. Ciappina, T. Kirchner, A. Kelkar, S. Hagmann, M. Grieser, K.-U. Kühnel, R. Moshammer, and J. Ullrich, Systematic analysis of double-ionization dynamics based on four-body Dalitz plots, Phys. Rev. A 80, 062703
  4. G. Schenk and T. Kirchner, Projectile electron loss in collisions of Ar6+ and Ar8+ ions with He and Ar atoms, J. Phys. B 42, 205202
  5. N. Henkel, M. Keim, H. J. Lüdde, and T. Kirchner, Density-functional-theory investigation of antiproton-helium collisions, Phys. Rev. A 80, 032704
  6. M. Schulz, M. F. Ciappina, T. Kirchner, D. Fischer, R. Moshammer, and J. Ullrich, Role of elastic projectile-electron scattering in double ionization of helium by fast proton impact, Phys. Rev. A 79, 042708
  7. L. Fernandez-Menchero, T. Kirchner, and H. J. Lüdde, Extension of the basis generator method for application to laser-molecule interactions, Phys. Rev. A 79, 023416
  8. M. Schulz, R. Moshammer, D. Fischer, M. Dürr, J. Ullrich, A. Hasan, M. F. Ciappina, and T. Kirchner, Current status of kinematically complete studies of basic fragmentation processes in atomic systems, Nucl. Instr. and Meth. B 267, 187

2008

  1. S. Knoop, D. Fischer, Y. Xue, M. Zapukhlyak, C. J. Osborne, Th. Ergler, T. Ferger, J. Braun, G. Brenner, H. Bruhns, C. Dimopoulou, S. W. Epp, A. J. Gonzalez Martinez, G. Sikler, R. Soria Orts, H. Tawara, T. Kirchner, J. R. Crespo Lopez-Urrutia, R. Moshammer, J. Ullrich, and R. Hoekstra, Single-electron capture in keV Ar15+...18+ + He collisions , J. Phys. B 41, 195203
  2. D. Strohschein, D. Röhrbein, T. Kirchner, S. Fritzsche, J. Baran, and J. A. Tanis, Nonstatistical enhancement of the 1s2s2p 4P state in electron transfer in 0.5-1.0 MeV/u C4,5+ + He and Ne collisions, Phys. Rev. A 77, 022706
  3. M. Zapukhlyak, T. Kirchner, A. Hasan, B. Tooke, and M. Schulz, Projectile angular-differential cross sections for transfer and transfer excitation in proton collisions with helium, Phys. Rev. A 77, 012720
  4. L. Gulyas, A. Igarashi, P. D. Fainstein, and T. Kirchner, Single and double ionization of helium: the axial symmetry, J. Phys. B 41, 025202
  5. M. F. Ciappina, M. Schulz, T. Kirchner, D. Fischer, R. Moshammer, and J. Ullrich, Double ionization of helium by ion impact analyzed using four-body Dalitz plots, Phys. Rev. A 77, 062706

2007

  1. T. Spranger, M. Zapukhlyak, and T. Kirchner, Angular differential cross sections for multiple ionisation of rare gas atoms by protons with inclusion of Auger-like processes, J. Phys. B 40, 1081
  2. T. Kirchner, Laser-field enhanced electron transfer in p-Ne and p-Ar collisions, Phys. Rev. A 75, 025401

2006

  1. L. Gulyas, A. Igarashi, and T. Kirchner, Double ionization of helium by fast ion impact: Reexamination of the correlation function, Phys. Rev. A 74, 032713
  2. A. Hasan, B. Tooke, M. Zapukhlyak, T. Kirchner, and M. Schulz, Kinematically complete experiment on transfer excitation in intermediate energy p+He collisions, Phys. Rev. A 74, 032703
  3. T. Kirchner, H. Tawara, I. Yu. Toptikhina, A. D. Ulantsev, V. P. Shevelko, and Th. Stöhlker, Multielectron ionization of atoms by fast ions: an approximation by normalized exponentials, Technical Physics 51(9), 1127

2005

  1. M. Keim, A. Werner, D. Hasselkamp, K. -H. Schartner, H. J. Lüdde, A. Achenbach, and T. Kirchner, Lyman-alpha polarisation after proton impact on atomic hydrogen, J. Phys. B 38, 4045
  2. S. Knoop, M. Keim, H. J. Lüdde, T. Kirchner, R. Morgenstern, and R. Hoekstra, State selective single-electron capture in O6+-Na collisions, J. Phys. B 38, 3163
  3. T. Kirchner, A. C. F. Santos, H. Luna, M. M. Sant'Anna, W. S. Melo, G. M. Sigaud, and E. C. Montenegro, Charge-state correlated cross sections for electron loss, capture, and ionization in C3+-Ne collisions, Phys. Rev. A 72, 012707
  4. M. Zapukhlyak, T. Kirchner, H. J. Lüdde, S. Knoop, R. Morgenstern, and R. Hoekstra, Inner- and outer-shell electron dynamics in proton collisions with sodium atoms , J. Phys B 38, 2353
  5. H. Bräuning, R. Trassl, A. Theiß, A. Diehl, E. Salzborn, M. Keim, A. Achenbach, H. J. Lüdde, and T. Kirchner, Charge transfer in Li2+ + He2+ and Li2+ + Li3+ collisions, J. Phys. B 38, 2311
  6. T. Kirchner, Pauli blocking and laser manipulation of the electron dynamics in atomic collisions, Nucl. Instr. and Meth. B 233, 151
  7. M. Keim, A. Achenbach, H. J. Lüdde, and T. Kirchner, Time-dependent density functional theory calculations for collisions of bare ions with helium, Nucl. Instr. and Meth. B 233, 240

2004

  1. T. Spranger and T. Kirchner, Auger-like processes in multiple ionisation of noble gas atoms by protons, J. Phys. B 37, 4159
  2. L. Gulyas and T. Kirchner, Ionization of Ar by energetic proton impact , Phys. Rev. A 70, 022704
  3. T. Kirchner, H. J. Lüdde, and M. Horbatsch, Nonperturbative study of the rearrangement dynamics in ion-atom collisions with active electrons on projectile and target , Phys. Scripta T110, 364
  4. T. Kirchner, Laser-field induced modifications of electron transfer processes in ion-atom collisions , Phys. Rev. A 69, 063412
  5. T. Kirchner, H. J. Lüdde, and M. Horbatsch, A time-dependent quantal approach to electronic transitions in atomic collisions , Recent Res. Devel. Physics, 5, 433
  6. T. Kirchner, M. Horbatsch, and H. J. Lüdde, Consistent coupled mean-field description of electron removal processes in He+-Ne and He+-Ar collisions, J. Phys. B 37, 2379
  7. J. A. Tanis, A. L. Landers, D. J. Pole, A. S. Alnaser, S. Hossain, and T. Kirchner, Evidence for Pauli exchange leading to excited-state enhancement in electron transfer , Phys. Rev. Lett. 92, 133201
  8. T. Kirchner, M. Horbatsch, M. Keim, and H. J. Lüdde, State-selectice electron capture calculations for p-Ar collisions in an independent many-electron model , Phys. Rev. A 69, 012708

2003

  1. M. Keim, A. Achenbach, H. J. Lüdde, and T. Kirchner, Microscopic response effects in collisions of antiprotons with helium atoms and lithium ions, Phys. Rev. A 67, 062711
  2. T. Kirchner, Electron interaction effects in ion-induced rearrangement and ionization dynamics: a theoretical perspective, in: Many-Particle Quantum Dynamics in Atomic and Molecular Fragmentation, ed. by V. P. Shevelko and J. Ullrich, (Springer, Heidelberg 2003)
  3. T. Kirchner, L. Gulyas, R. Moshammer, M. Schulz, and J. Ullrich, Correlation effects in differential electron-emission spectra obtained from double ionization of He by fast Au53+ impact, Nucl. Instr. and Meth. B 205, 479

2002

  1. T. Kirchner, M. Horbatsch, and H. J. Lüdde, Time-dependent independent particle model calculation of multiple capture and ionization processes in p+-Ar, p--Ar, and He2+-Ar collisions, Phys. Rev. A 66, 052719
  2. H. J. Lüdde, T. Kirchner, and M. Horbatsch, Quantum mechanical treatment of ion collisions with many-electron atoms , in: Photonic, Electronic, and Atomic Collisions , ed. by. J. Burgdörfer et al., Rinton Press, Princeton, p. 708.
  3. T. Kirchner, Manipulating ion-atom collisions with coherent electromagnetic radiation , Phys. Rev. Lett. 89, 093203
  4. T. Kirchner, L. Gulyas, R. Moshammer, M. Schulz, and J. Ullrich, Doubly differential electron emission spectra in single and multiple ionization of noble gas atoms by fast highly-charged ion impact , Phys. Rev. A 65, 042727
  5. T. Kirchner, M. Horbatsch, E. Wagner, and H. J. Lüdde, Modelling of polarization and correlation effects in the ionization of helium by antiprotons , J. Phys. B 35, 925

2001

  1. D. Skiera, R. Trassl, K. Huber, H. Bräuning, E. Salzborn, M. Keim, A. Achenbach, T. Kirchner, H. J. Lüdde, and R. M. Dreizler, Charge-changing processes in collisions between Li-like ions and He2+ , Physica Scripta T92, 423
  2. T. Kirchner and L. Gulyas, Differential net- and multiple-ionization cross sections in fast highly-charged ion collisions with atoms , Phys. Scripta, T92, 348
  3. T. Kirchner, M. Horbatsch, and H. J. Lüdde, Nonperturbative calculation of charge-changing processes in C4+ scattering from neon atoms , Phys. Rev. A 64, 012711
  4. T. Kirchner and M. Horbatsch, Nonperturbative calculation of projectile-electron loss, target ionization, and capture in He+ + Ne collisions , Phys. Rev. A 63, 062718

2000

  1. T. Kirchner, M. Horbatsch, H. J. Lüdde and R. M. Dreizler, Time-dependent screening effects in ion-atom collisions with many active electrons , Phys. Rev. A 62, 042704
  2. L. Gulyas, T. Kirchner, T. Shirai and M. Horbatsch, Origin of structures in the low-energy single-electron continuum in calculations for ion collisions from argon , Phys. Rev. A 62, 022702
  3. T. Kirchner, H. J. Lüdde, M. Horbatsch and R. M. Dreizler, Quantum mechanical description of ionization, capture and excitation in proton collisions with atomic oxygen , Phys. Rev. A 61, 052710
  4. T. Kirchner, H. J. Lüdde and R. M. Dreizler, Effective single-particle description of single and multiple processes in p+/- + Ne collisions, Phys. Rev. A 61, 012705

1999

  1. T. Kirchner, H. J. Lüdde and R. M. Dreizler, Many electron dynamics in collisions between highly charged ions and neon atoms , Phys. Scripta T80, 416
  2. T. Kirchner, M. Keim, A. Achenbach, H. J. Lüdde, O. J. Kroneisen and R. M. Dreizler, Basis generator method study of collisions between alpha particles and lithium-like ions , Phys. Scripta T80, 270
  3. T. Kirchner, H. J. Lüdde, O. J. Kroneisen and R. M. Dreizler, New trends in the description of ion-atom collisions by time-dependent quantum methods , Nucl. Instr. and Meth. B 154, 46
  4. O. J. Kroneisen, H. J. Lüdde, T. Kirchner and R. M. Dreizler, The basis generator method: optimized dynamical representation of the solution of time-dependent quantum problems , J. Phys. A 32, 2141
  5. D. Elizaga, L. F. Errea, J. D. Gorfinkiel, C. Illescas, L. Mendez, A. Riera, A. Rojas, A. Macias, O. J. Kroneisen, T. Kirchner, H. J. Lüdde, A. Henne and R. M. Dreizler, Theoretical analysis of electron capture and electron-loss in Be4+ + H2 and H+ + H2 collisions, J. Phys. B 32, 857

1998

  1. T. Kirchner, L. Gulyas, H. J. Lüdde, E. Engel and R. M. Dreizler, Influence of electronic exchange on single and multiple processes in collisions between bare ions and noble gas atoms, Phys. Rev. A 58, 2063

1997

  1. T. Kirchner, L. Gulyas, H. J. Lüdde, A. Henne, E. Engel and R. M. Dreizler, Electronic exchange effects in p+Ne and p+Ar collisions, Phys. Rev Lett. 79, 1658

1996

  1. H. J. Lüdde, A. Henne, T. Kirchner and R. M. Dreizler, Optimized dynamical representation of the solution of time- dependent quantum problems, J. Phys. B 29, 4423