57Fe Mo¨ssbauer spectroscopy in a diamond‐anvil cell at variable high pressures and cryogenic temperatures
作者:
G. R. Hearne,
M. P. Pasternak,
R. D. Taylor,
期刊:
Review of Scientific Instruments
(AIP Available online 1994)
卷期:
Volume 65,
issue 12
页码: 3787-3792
ISSN:0034-6748
年代: 1994
DOI:10.1063/1.1144508
出版商: AIP
数据来源: AIP
摘要:
A detailed description is given of a new facility for transmission57Fe Mo¨ssbauer spectroscopy (MS) studies on absorbers in a miniature diamond‐anvil cell in the temperature range 10–300 K and pressure range 0–45 GPa. Spectra with an adequate signal‐to‐noise ratio for a reliable analysis to be made have each been measured in 20–30 h of data accumulation time. This has been accomplished in spite of the severe constraints imposed by both the minute sample area and the high attenuation of the 14.4 keV probing radiation by the diamond anvils compared with the experimental conditions of conventional MS experiments. A custom‐made Rh(57Co) ‘‘point’’ source with a high specific activity has been used in conjunction with absorbers that have an optimal enrichment (10%–20%) of57Fe. The successful implementation of57Fe Mo¨ssbauer spectroscopy at very high pressures and variable cryogenic temperatures has been accomplished by making relatively simple refinements to existing elements of high‐pressure MS methodology. ©1994 American Institute of Physics.
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