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Stereo‐dynamical ion‐pair formation in collisions of highly‐charged ions with argon dimers
Author(s) -
OhyamaYamaguchi Tomoko,
Ichimura Atsushi
Publication year - 2019
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.3066
Subject(s) - ion , atomic physics , dimer , argon , coulomb , ionization , coulomb explosion , highly charged ion , physics , chemistry , ion source , nuclear physics , electron , nuclear magnetic resonance , quantum mechanics
Multiple ionization process of a rare gas dimer BC collided with a slow highly charged ion A q + is investigated with the three‐center Coulombic over‐barrier model previously developed by the present authors. To reveal stereodynamical effects, we calculate asymmetric ion‐pair formation cross sections σ ( Q B , Q C ) as a function of the orientation angle. We introduce a pair of atomic impact parameters b B and b C with which we distinguish the near and far sites. Furthermore, we distinguish the forward and backward emitted ions produced as a result of Coulomb explosion. Partial screening effects are also considered.