Performance report of a newly developed slow positron pulsing apparatus

被引：2
|
作者：
Oshima, N [1 ]
Hamada, E
Suzuki, T
Kanazawa, I
Ito, Y
机构：
[1] Grad Univ Adv Studies, High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 305, Japan
[2] Tokyo Gakugei Univ, Dept Phys, Tokyo 184, Japan
[3] Univ Tokyo, Nucl Sci & Technol Res Ctr, Tokai, Ibaraki 31911, Japan
来源：
POSITRON ANNIHILATION: ICPA-11 - PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON POSITRON ANNIHILATION, KANSAS CITY, MISSOURI, USA, MAY 1997 | 1997年 / 255-2卷
关键词：
slow positron beam; positron lifetime; positron annihilation; polymer;
D O I：
10.4028/www.scientific.net/MSF.255-257.629
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A pulsing system for slow positrons is under development for variable energy positron lifetime spectroscopy (VEPLS). In the new system using Na-22 radioisotopes and by the time dependent moderator bias, slow positrons have been compressed more than 50 % in a pulse with similar to 1.2 ns FWHM at similar to 25 MHz. In this paper, the preliminary results of VEPLS for three samples, aluminum, polyethylene and teflon are presented.
引用
收藏
页码：629 / 631
页数：3
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