TY - JOUR
T1 - Spin- and fine-structure-resolved ionization of krypton
AU - Bellm, S.
AU - Lower, J.
AU - McEachran, R. P.
AU - Weigold, E.
AU - Ryan-Anderson, C.
AU - Madison, D. H.
PY - 2008/12/10
Y1 - 2008/12/10
N2 - The influence of exchange, correlation, and relativistic effects in the ionization of heavy-target atoms can be sensitively probed by kinematically complete studies involving spin-polarized electrons, in particular when the fine structure of the residual ion is resolved. We present spin asymmetries, triple differential cross sections, and branching ratios for the ionization, by 127.5-eV and 114.3-eV electrons, of ground-state krypton atoms leading to the Kr+ 4s S 1/2 2, 4 p5 P 1/2 2, and 4 p5 P 3/2 2 states. In order to untangle contributions from different physical effects, the experimental results are compared to those from distorted-wave Born approximation calculations (non- and semirelativistic) in which bound-state and continuum effects are treated in different ways. Additional insight is gained by comparing the present experimental and theoretical results to recent results on the e-Xe system, performed under similar kinematics, for which target relativistic effects play a more significant role.
AB - The influence of exchange, correlation, and relativistic effects in the ionization of heavy-target atoms can be sensitively probed by kinematically complete studies involving spin-polarized electrons, in particular when the fine structure of the residual ion is resolved. We present spin asymmetries, triple differential cross sections, and branching ratios for the ionization, by 127.5-eV and 114.3-eV electrons, of ground-state krypton atoms leading to the Kr+ 4s S 1/2 2, 4 p5 P 1/2 2, and 4 p5 P 3/2 2 states. In order to untangle contributions from different physical effects, the experimental results are compared to those from distorted-wave Born approximation calculations (non- and semirelativistic) in which bound-state and continuum effects are treated in different ways. Additional insight is gained by comparing the present experimental and theoretical results to recent results on the e-Xe system, performed under similar kinematics, for which target relativistic effects play a more significant role.
UR - http://www.scopus.com/inward/record.url?scp=57649109655&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.78.062707
DO - 10.1103/PhysRevA.78.062707
M3 - Article
SN - 1050-2947
VL - 78
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 062707
ER -