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.
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收藏
页码：L585 / L588
页数：4
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