TY - JOUR
T1 - Systematic analysis of double-ionization dynamics based on four-body Dalitz plots
AU - Fischer, D.
AU - Schulz, M.
AU - Schneider, K.
AU - Ciappina, M. F.
AU - Kirchner, T.
AU - Kelkar, Ajit D
AU - Hagman, S.
AU - Grieser, M.
AU - Kühnel, K. U.
AU - Moshammer, R.
AU - Ullrich, J.
PY - 2009/12/3
Y1 - 2009/12/3
N2 - We report on an experimental and theoretical systematic study of double ionization of helium by ion impact in terms of four-particle Dalitz plots. Several collision systems covering a broad range of perturbation parameters η (projectile charge to speed ratio) were investigated. With increasing η we observe a systematic trend from features, characteristic to correlated double-ionization mechanisms, to signatures of higher-order processes not requiring electron-electron correlations [the mechanism called "two-step-two projectile-electron interaction" (TS-2)]. The data for the largest η can qualitatively be amazingly well described by a simple model only including the TS-2 mechanism. © 2009 The American Physical Society.
AB - We report on an experimental and theoretical systematic study of double ionization of helium by ion impact in terms of four-particle Dalitz plots. Several collision systems covering a broad range of perturbation parameters η (projectile charge to speed ratio) were investigated. With increasing η we observe a systematic trend from features, characteristic to correlated double-ionization mechanisms, to signatures of higher-order processes not requiring electron-electron correlations [the mechanism called "two-step-two projectile-electron interaction" (TS-2)]. The data for the largest η can qualitatively be amazingly well described by a simple model only including the TS-2 mechanism. © 2009 The American Physical Society.
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U2 - 10.1103/PhysRevA.80.062703
DO - 10.1103/PhysRevA.80.062703
M3 - Article
SN - 1050-2947
VL - 80
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 062703
ER -