Angular dependence, blackness and polarization effects in integral conversion electron Mossbauer spectroscopy

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:342

Article

Sajti, Sz.¹  Tancziko, F.¹  Deak, L.¹  Nagy, D. L.¹  Bottyan, L.¹ 

[1] RMKI, Wigner RCP, H-1525 Budapest, Hungary

关键词: Conversion electron Mossbauer spectroscopy;    Polarimetry;    Thickness effect;   

DOI  :  10.1016/j.nimb.2014.09.013

来源: Elsevier

【 摘 要 】

General expressions of the electron yield in Fe-57 integral conversion electron Mossbauer spectroscopy were derived depending on the glancing angle of the gamma photons, on the source polarization and on the isotopic abundance of the source and the absorber (blackness effects) using an exponential escape function of the electrons originating from all Mossbauer-resonance-related processes. The present approach provides a firm theoretical basis to determine the alignment and direction of magnetization in the absorber. The intensity formulae were justified by least squares fits of alpha-Fe-57 spectral intensities measured in linearly and elliptically polarized source and absorber geometries. The fits reproduce the experimentally set angles with high accuracy. Limits of the current approach and its relation to other, less complete treatments in the literature are discussed. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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