ENERGY-DEPENDENCE OF EXCITED POSITRONIUM FORMATION AT A MOLYBDENUM SURFACE

被引：10

作者：

LEY, R ^{[1
]}

NIEBLING, KD ^{[1
]}

WERTH, G ^{[1
]}

HAHN, C ^{[1
]}

SCHNEIDER, H ^{[1
]}

TOBEHN, I ^{[1
]}

机构：

[1] UNIV GIESSEN,ZENTRUM STRAHLEN,W-6300 GIESSEN,GERMANY

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1990年 / 23卷 / 19期

关键词：

Electrons; -; Molybdenum;

D O I：

10.1088/0953-4075/23/19/024

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The slow positron beam facility TEPOS at the 65 MeV electron linear accelerator in Giessen has been used to produce an intense beam of monoenergetic positrons. The impact energy of the positrons hitting the surface of a polycrystalline molybdenum foil has been varied between 0 and 470 eV. The authors observed the formation of n=2 positronium by the emitted Lyman- alpha radiation and its change as a function of the positron energy. They found a maximum yield of excited positronium at an implantation energy of (60+or-20) eV. The yield decreased to 50% of the maximum value at about 200 eV. © 1990 IOP Publishing Ltd.

引用

页码：3437 / 3442

页数：6

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