Improved charge-state formulas

被引：247

作者：

Schiwietz, G

Grande, PL

机构：

[1] Hahn Meitner Inst Kernforsch Berlin GmbH, Bereich Strukturforsch SF4, D-14109 Berlin, Germany

[2] Univ Fed Rio Grande Sul, Inst Fis, BR-91500 Porto Alegre, RS, Brazil

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2001年 / 175卷

关键词：

charge-exchange; stopping power; energy loss;

D O I：

10.1016/S0168-583X(00)00583-8

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A large set of experimental charge-state distributions is analyzed in this work. Two fit formulas are presented for mean equilibrium charge states of projectiles ranging from protons to uranium. One formula is given for all ions in gas targets and another one for solid targets. The deviation from the experimental data is reduced by roughly a factor of two in comparison with the widely used formula by Nikolaev and Dmitriev as well as with the Bohr stripping criterion as revised by Northcliffe. Finally, the influence of the projectile charge state on the prediction of stopping powers for fast projectiles in carbon is shown and comparison is made with experimental energy-loss data. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：125 / 131

页数：7

共 21 条

[1] EXPERIMENTAL RESULTS ON CHARGE-CHANGING COLLISIONS OF HYDROGEN AND HELIUM ATOMS AND IONS AT KINETIC ENERGIES ABOVE 0.2 KEV [J].