ATOMIC-XAFS AND XANES

被引：47

作者：

REHR, JJ ^{[1
]}

ZABINSKY, SI ^{[1
]}

ANKUDINOV, A ^{[1
]}

ALBERS, RC ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA

来源：

PHYSICA B | 1995年 / 208卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(94)00623-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

X-ray-absorption near edge structure (XANES) poses many theoretical challenges and a general quantitative theory remains elusive. We have studied structural contributions to XANES based on high-order multiple-scattering (MS) calculations, including X-ray polarization. Ab initio MS calculations of XANES are presented using a code FEFF6X, that includes estimates of the amplitude reduction factor S-0(2). White-lines and continuum shape resonances in XANES are described quantitatively. We have observed that the atomic background absorption contains oscillatory structure which can play an important role in XANES. Calculations and measurements confirm the existence of AXAFS and show that it can dominate contributions such as multi-electron excitations.

引用

页码：23 / 26

页数：4

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