CONVERGENCE OF THE MULTIPOLE EXPANSION FOR THE DOUBLY DIFFERENTIAL IONIZATION CROSS-SECTION

被引:2
作者
CRAVERO, WR [1 ]
GARIBOTTI, CR [1 ]
机构
[1] CONSEJO NACL INVEST CIENT & TECN, RA-8400 San Carlos De Bariloche, RIO NEGRO, ARGENTINA
来源
PHYSICAL REVIEW A | 1994年 / 50卷 / 05期
关键词
D O I
10.1103/PhysRevA.50.3898
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We analyze the convergence of the Legendre polynomials expansion of the doubly differential cross section (DDCS) for soft electron emission (SEE) in ion-atom collisions. This expansion has been recently employed in the analysis of the angular shape of theoretical as well as experimental data on SEE. Numerical calculations using the continuum-distorted-wave eikonal-initial-state (CDW-EIS) approximation show that for sufficient low electron velocity, the DDCS for ionization is well described with a few terms of the expansion. Besides, we show analytically that the expansion reduces to the first three terms in the zero-emission-velocity limit, within CDW or CDW-EIS approaches. © 1994 The American Physical Society.
引用
收藏
页码:3898 / 3904
页数:7
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