β+-γ coincidence positron lifetime spectrometer with positron energy selection by electromagnetic lens

被引：1

作者：

Chalermkarnnon, P ^{[1
]}

Shishido, I

Yuga, M

Araki, H

Shirai, Y

机构：

[1] Osaka Univ, Dept Mat Sci & Engn, Suita, Osaka 5650871, Japan

[2] Kyoto Univ, Dept Mat Sci & Technol, Kyoto 6068501, Japan

[3] Osaka Univ, Grad Sch Engn, Frontier Res Ctr, Suita, Osaka 5650871, Japan

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS | 2002年 / 66卷 / 10期

关键词：

positron annihilation; positron lifetime; beta(+)-gamma coincidence; electromagnetic lens; time resolution; avalanche diode;

D O I：

10.2320/jinstmet1952.66.10_1004

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A beta(+)-gamma coincidence positron lifetime spectrometer equipped with two electromagnetic lenses was constructed. The electromagnetic lens was used to have energy-selected positron beam. It accomplished a time resolution of 385 ps (FWHM) for the total system with a Pilot U plastic scintillator. By using a silicon avalanche diode instead of Pilot U plastic scintillator to initiate start timing signals, the time resolution was improved to 345 ps (FWHM). With this method, in-situ positron lifetime measurements at high temperatures or under high stresses can be attained easily.

引用

页码：1004 / 1008

页数：5

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