POSITRONIUM FORMATION IN THE N=1 AND N=2 STATES IN E+-HE SCATTERING

被引：15

作者：

SARKAR, NK ^{[1
]}

BASU, M ^{[1
]}

GHOSH, AS ^{[1
]}

机构：

[1] SODEPUR CHANDRACHUR VIDYAPITH, SODEPUR 743718, W BENGAL, INDIA

来源：

PHYSICAL REVIEW A | 1992年 / 45卷 / 09期

关键词：

D O I：

10.1103/PhysRevA.45.6887

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Positronium formation in the n = 1 and n = 2 levels in e+-He collision has been studied using a second-order Born approximation. Differential and integrated capture cross sections are reported in the energy range 100 eV-2 keV. The predicted total positronium-formation cross sections differ from measured values, the theoretical results being lower. The first-order Born results are not expected to be valid in the energy range considered. A Thomas mechanism is found to be valid in the case of the ground as well as the 2s excited state. A similar structure in the differential cross section for 2p-state capture has not been found.

引用

页码：6887 / 6890

页数：4

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