Target K-shell X-ray emission associated with single and double electron capture for F9+, 8+,7+ + Ar collisions

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:475

Article

La Mantia, D. S.¹  Kumara, P. N. S.¹  Tanis, J. A.¹ 

[1] Western Michigan Univ, Kalamazoo, MI 49008 USA

关键词: Ions;    Ion collisions;    K shell;    Ionization;    Cross sections;   

DOI  :  10.1016/j.nimb.2020.04.027

来源: Elsevier

【 摘 要 】

Cross sections for target Ar K-shell ionization associated with single and double electron capture, as well as the same cross sections corresponding to projectile F K X-rays and the total cross sections for single and double capture, were determined for 1.8-2.2 MeV/u F-9+,F-8+,F- 7+ projectiles. This work was performed at Western Michigan University using the tandem Van de Graaff accelerator. Coincidences between emitted X-rays and their corresponding charge-changed particles were detected. The Ar K X-ray coincidence cross section ratios for double to single capture are found to depend strongly on the incident charge state, with the ratios for F9+ well exceeding unity. Possible explanations for this anomalous behavior are discussed but a conclusive explanation is not found. The results are compared to previous experiments using fully-stripped fluorine where coincidence techniques were not employed.

【 授权许可】

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