MOSSBAUER LINESHAPE DISTORTIONS DUE TO FINITE DIMENSIONS OF SOURCE AND DETECTOR

被引：1

作者：

FLORESLLAMAS, H ^{[1
]}

ZAMORANOULLOA, R ^{[1
]}

机构：

[1] ESCUELA SUPER FIS & MATEMAT,INST POLITECN NACL,DEPT FIS,MEXICO CITY,DF,MEXICO

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1991年 / 58卷 / 02期

关键词：

D O I：

10.1016/0168-583X(91)95600-I

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The effects of non-collimation of gamma-rays and finite dimensions of source and detector upon the isomer shift, line broadening and line height of Mossbauer spectra have been determined by means of a two-dimensional angular distribution f(r, rho) that weights a Lorentzian lineshape function. This distribution function, along with a few approximations, allow one to calculate, with ease, these Mossbauer spectral parameters. Our expressions, valid for finite dimensions, of source, detector and absorber, generalize previous calculations. As a result, we can say that when a finite source (R(s) = 0.4 cm) is 10 cm distance from a detector (R(d) = 1.4 cm), the non-collimation of the gamma-rays generates distortions of the absorption line that are still within the experimental error.

引用

页码：272 / 277

页数：6