Open AccessInvestigation of the processes in the collisions of partially stripped carbon ions with helium atom at low to intermediate energies
Author(s) -
Gao Zhi-Min,
Ximeng Chen,
Zhaoyuan Liu,
Ding Bao-Wei,
Lu Yan-Xia,
FU Hong-bin,
Yuwen Liu,
Juan Du,
Ying Chen,
Shao Jian-Xiong,
Hongqiang Zhang,
Guo Hua Sun
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.2079
Subject(s) - ion , helium , atomic physics , carbon fibers , atom (system on chip) , helium atom , carbon atom , physics , materials science , chemistry , quantum mechanics , composite number , ring (chemistry) , computer science , composite material , embedded system , organic chemistry
he cross-section ratios for the double-to-single ionization of He associated with no projectile charge change (Rq,q), single-electron capture (Rq,q-1) and single-electron loss (Rq,q+1) were measured using coincidence technique. The coincidences resulted from the signals of recoil ions and scattered projectiles. For a given incoming projectile charge state the double-to-single ionization ratios vary strongly with the outgoing reaction channel. It is found that Rq,qRq,q+1Rq,q-1. For direct ionization, Rq,q is nearly independent of the incident projectile charge state. However, for ionization associated with single-electron capture and single-electron loss by the projectile, Rq,q-1 and Rq,q+1 depend strongly on the incident charge state of the projectile. These ionization ratios are interpreted in terms of theories of the atomic polarization effect and the screening and antiscreening effect of the electrons around the core.