Anatomy of charge-exchange straggling

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

卷:338

Article

Sigmund, P.¹  Osmani, O.²  Schinner, A.³ 

[1] Univ Southern Denmark, Dept Phys Chem & Pharm, DK-5230 Odense, Denmark

[2] Univ Duisburg Essen, Dept Phys, D-47048 Duisburg, Germany

[3] Johannes Kepler Univ Linz, Inst Expt Phys, A-4040 Linz, Austria

关键词: Stopping power;    Straggling;    Charge exchange;    Charge equilibrium;    Swift heavy ions;   

DOI  :  10.1016/j.nimb.2014.08.006

来源: Elsevier

【 摘 要 】

We have studied charge-exchange straggling theoretically for swift krypton and silicon ions and five target gases in the MeV/u energy regime. We find a pronounced two-peak structure for all ion-target combinations. The peak at the highest energy appears around the velocity where the bare ion and the one-electron ion are equally abundant in the equilibrium charge distribution. Correspondingly, the low-energy peak appears near the cross-over between the charge fractions of the two- and the three-electron ion. The possibility of further peaks at lower energies is discussed. Our findings are compared with recent experimental results on straggling of krypton beams. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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