CALCULATION OF THE CROSS-SECTION FOR E+-E- (K ORBIT) PAIRS BY VERY-HIGH-ENERGY FULLY STRIPPED HEAVY-IONS AT PERTURBATIONAL IMPACT PARAMETERS

被引：39

作者：

BALTZ, AJ ^{[1
]}

RHOADESBROWN, MJ ^{[1
]}

WENESER, J ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB, RELATIVIST HEAVY ION COLLIDER PROJECT, UPTON, NY 11973 USA

来源：

PHYSICAL REVIEW A | 1993年 / 48卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.48.2002

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The cross section for the production of e+-e- (K orbit) pairs by very-high-energy fully stripped heavy ions is calculated for large impact parameters, where perturbation theory is valid. To achieve accuracy a large range of angular momenta and energies is explicitly computed. The remaining high-angular-momentum and high-energy domain are included by means of a modified version of an asymptotic expansion devised by Hall [Phys. Rev. 45, 620 (1934); Rev. Mod. Phys. 8, 358 (1936)]. An approximation to the small-impact-parameter, nonperturbative contribution is taken from previous work to obtain a reliable estimate for the practically important Au79+ on Au79+ cross section.

引用

页码：2002 / 2011

页数：10

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