Positron-molecule scattering experiments

被引：14

作者：

Kwan, CK ^{[1
]}

Kauppila, W ^{[1
]}

Nazaran, S ^{[1
]}

Przybyla, D ^{[1
]}

Scahill, N ^{[1
]}

Stein, TS ^{[1
]}

机构：

[1] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48202 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1998年 / 143卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0168-583X(97)00936-1

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have extended our measurements of the relative elastic differential cross sections (DCSs) and positronium formation cross sections (Q(Ps)s) for positron scattering to include molecules of varying complexity and symmetry. Diffraction effects observed in our earlier e(+)-Ar and e(+)-CH4 DCS measurements [Phys. Rev. A 55 (1997) 4244] are shown to have disappeared for a linear tri-atomic molecule, CO2. In contrast to the structureless, bell-shaped Ps-formation curves of H and H-2 [Phys. Rev. A 55 (1997) 361], the Ps-formation cross section curves for CH4, CO2, and SF6 show structure which may be associated with electron transfer of inner orbital electrons of the molecule. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：61 / 67

页数：7

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