Development of a cone‐geometry positron moderator
作者:
K. G. Lynn,
E. Gramsch,
S. G. Usmar,
P. Sferlazzo,
期刊:
Applied Physics Letters
(AIP Available online 1989)
卷期:
Volume 55,
issue 1
页码: 87-89
ISSN:0003-6951
年代: 1989
DOI:10.1063/1.101716
出版商: AIP
数据来源: AIP
摘要:
Results are presented on a new cone‐shaped positron moderator which shows a high moderator efficiency (i.e., conversion of beta decay to emitted slow positrons). The moderator efficiencies for the cone moderators studied were found to be up to 0.14% compared to thin‐foil measurements of 0.06% in the same experimental system including identical source and holder. These moderators are rugged and easily fabricated, however, they have a lower brightness than single‐crystal foil moderators. Comparison of various geometries is presented as well as suggestions for further improvements to increase the total efficiencies.
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