High Energy Resolution Off-Resonant Spectroscopy for X-Ray Absorption Spectra Free of Self-Absorption Effects

被引：36

作者：

Blachucki, W. ^{[1
]}

Szlachetko, J. ^{[2
,3
]}

Hoszowska, J. ^{[1
]}

Dousse, J. -Cl. ^{[1
]}

Kayser, Y. ^{[1
]}

Nachtegaal, M. ^{[2
]}

Sa, J.

机构：

[1] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[3] Jan Kochanowski Univ, Inst Phys, PL-25406 Kielce, Poland

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 17期

基金：

瑞士国家科学基金会;

关键词：

CHEMICAL SPECIATION; YIELD; SCATTERING; RADIATION; SAMPLES; DIPS;

D O I：

10.1103/PhysRevLett.112.173003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X-ray emission spectra recorded in the off-resonant regime carry information on the density of unoccupied states. It is known that by employing the Kramers-Heisenberg formalism, the high energy resolution off-resonant spectroscopy (HEROS) is equivalent to the x-ray absorption spectroscopy (XAS) technique and provides the same electronic state information. Moreover, in the present Letter we demonstrate that the shape of HEROS spectra is not modified by self-absorption effects. Therefore, in contrast to the fluorescence-based XAS techniques, the recorded shape of the spectra is independent of the sample concentration or thickness. The HEROS may thus be used as an experimental technique when precise information about specific absorption features and their strengths is crucial for chemical speciation or theoretical evaluation.

引用

页数：5

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