Charge-exchange straggling in equilibrium

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

卷:269

Article

Sigmund, P.¹  Osmani, O.^2,3,4  Schinner, A.⁵ 

[1] Univ So Denmark, Dept Chem & Phys, DK-5230 Odense M, Denmark

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

[3] Univ Kaiserslautern, Dept Phys, D-67653 Kaiserslautern, Germany

[4] Res Ctr OPTIMAS, D-67653 Kaiserslautern, Germany

[5] 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.2010.11.094

来源: Elsevier

【 摘 要 】

A general expression has been derived that allows computation of charge-exchange straggling of swift heavy ions when many charge states are involved. Charge exchange is found to hinge on the variation of the stopping cross section with the ion charge and on the transient behavior of the charge population as a function of traveled pathlength. These effects appear factorized in the final formula. The focus of this paper is on straggling in charge equilibrium. The case of MeV/u sulfur ions in carbon has been used as an illustration. Charge-exchange straggling is found to be dominating straggling over a considerable range of beam energies. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

Free