Multiple ionization of atoms and molecules in collisions with fast ions: Ion-atom collisions

被引：44

作者：

Kabachnik, NM ^{[1
]}

Kondratyev, VN ^{[1
]}

RollerLutz, Z ^{[1
]}

Lutz, HO ^{[1
]}

机构：

[1] JAPAN ATOM ENERGY RES INST, ADV SCI RES CTR, NAKA, IBARAKI 31911, JAPAN

来源：

PHYSICAL REVIEW A | 1997年 / 56卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.56.2848

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A theoretical description of multiple ionization of atoms and molecules produced by an energetic ion impact is developed. It is based on the statistical energy-deposition model of Russek and Meli [Physica (Amsterdam) 46, 222 (1970)]. In this model the probability far the formation of a collision-induced final state with n electrons in the continuum is obtained, assuming that its value is proportional to the volume of phase space available at that ionization state for a certain value of statistically distributed deposited energy. The model is extended in two respects. First, the deposited energy for each trajectory is considered as a fluctuating quantity with a certain distribution and the ionization probability is calculated as a weighted average over the distribution. Second, the mean value and straggling of the deposited energy are calculated within the Lindhard-Scharff local plasma approximation [Mat. Fys. Medd. K. Dan. Vidensk. Selsk. 27, No. 15 (1953)]. Sample calculations for collisions of protons and F4+ ions with neon atoms at an energy of 1 Mev/amu are presented and compared with calculations within the independent-electron approximation and with experimental data.

引用

页码：2848 / 2854

页数：7

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