ELASTIC POSITRON-HELIUM SCATTERING NEAR THE POSITRONIUM FORMATION THRESHOLD

被引：18

作者：

COLEMAN, PG ^{[1
]}

JOHNSTON, KA ^{[1
]}

COX, AMG ^{[1
]}

GOODYEAR, A ^{[1
]}

CHARLTON, M ^{[1
]}

机构：

[1] UNIV LONDON UNIV COLL,DEPT PHYS & ASTRON,LONDON WC1E 6BT,ENGLAND

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1992年 / 25卷 / 22期

关键词：

D O I：

10.1088/0953-4075/25/22/006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Measurements of that part of the total positron-helium cross section not associated with positronium formation have been made for positron energies between 14 and 28 eV. The experimental results do not support the existence of a cusp in the elastic scattering cross section at the positronium formation threshold energy (17.8 eV) as significant as that previously deduced by Campeanu et al.

引用

页码：L585 / L588

页数：4

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