SOLID-STATE EFFECTS ON RAYLEIGH-SCATTERING EXPERIMENTS - LIMITS FOR THE FREE-ATOM APPROXIMATION

被引：12

作者：

GONCALVES, OD ^{[1
]}

CUSATIS, C ^{[1
]}

MAZZARO, I ^{[1
]}

机构：

[1] UNIV FED PARANA, DEPT FIS, BR-81531 CURITIBA, BRAZIL

来源：

PHYSICAL REVIEW A | 1993年 / 48卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.48.4405

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Elastic scattering of photons from solid samples of Pb, Pt, and W was measured in order to investigate the limits within which scattering experiments can be described as being due to free atoms. The experiments were performed with photons of 22.1 keV from an x-ray tube and from an Am-241 (59.54 keV) gamma source, providing a momentum transfer ranging from x = 0.1 to 2.0 angstrom-1. It is shown that the low-momentum-transfer limit for the free-atom approximation will depend on the scatterer, temperature, geometrical resolution, and on the accuracy of the experiment.

引用

页码：4405 / 4410

页数：6

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