POSITRON EMISSION YIELDS FOR ENCAPSULATED NA-22 SOURCES

被引：15

作者：

MASSOUMI, GR

SCHULTZ, PJ

LENNARD, WN

OCIEPA, J

机构：

[1] Univ of Western Ontario, London,, Ont, Can, Univ of Western Ontario, London, Ont, Can

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1988年 / 30卷 / 04期

关键词：

GAMMA RAYS - Radioactivity - ION SOURCES - SODIUM AND ALLOYS;

D O I：

10.1016/0168-583X(88)90136-X

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have measured the total gamma -activity and the emitted positron yields from two commercial **2**2Na sources (approx. 5 mCi and approx. 70 mCi). For the weaker source, we find good agreement between the number of positrons expected (based on gamma -yield measurements) and those observed, after estimating the effect of positron absorption in the Ti window of the source capsule. The yield of positrons from the stronger source is a factor of two lower than expected. Reasons for the discrepancy are discussed.

引用

页码：592 / 597

页数：6

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