Measurement of CuK-shell and Ag L-shell ionization cross sections by low-energy positron impact -: art. no. 223201

被引：41
作者：
Nagashima, Y
Saito, F
Itoh, Y
Goto, A
Hyodo, T
机构：
[1] Univ Tokyo, Grad Sch Arts & Sci, Inst Phys, Meguro Ku, Tokyo 1538902, Japan
[2] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.92.223201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Inner shell ionization cross sections by low-energy positron impact have been measured. Development of an x-ray detector with thin Si(Li) crystals has enabled the first measurements of the absolute cross sections for the positron impacts in the energy range below 30 keV. Threshold behavior of the measured cross sections for the Cu K shell and Ag L shell are compared with the theoretical results of Gryzinski and Kowalski [Phys. Lett. A 183, 196 (1993)] and Khare and Wadehra [Can. J. Phys. 74, 376 (1996)]. Good agreement has been found for the Cu K shell, while the experimental values for the Ag L shell were found to be smaller than the corresponding theoretical results.
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页码：223201 / 1
页数：4
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