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On Mössbauer thermometry in the Millikelvin region

On Mössbauer thermometry in the Millikelvin region Resonant absorption of γ-rays by57Fe and119Sn in iron was investigated to study the possibility of ultralow-temperature measurements by the Mössbauer effect. A dilution refrigerator which could provide temperatures down to 6 mK was used. The Mössbauer temperature of119Sn coincided with the temperature in the mixing chamber down to 6 mK if the heat input to the absorber was low enough (≲10−5 erg/sec). But the Mössbauer temperatures of57Fe stayed almost invariable below 15 mK. In the same iron sample the nuclei of57Fe and119Sn had different Mössbauer temperatures below 15 mK. The reasons for this phenomenon are not yet clear. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

On Mössbauer thermometry in the Millikelvin region

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References (6)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00661195
Publisher site
See Article on Publisher Site

Abstract

Resonant absorption of γ-rays by57Fe and119Sn in iron was investigated to study the possibility of ultralow-temperature measurements by the Mössbauer effect. A dilution refrigerator which could provide temperatures down to 6 mK was used. The Mössbauer temperature of119Sn coincided with the temperature in the mixing chamber down to 6 mK if the heat input to the absorber was low enough (≲10−5 erg/sec). But the Mössbauer temperatures of57Fe stayed almost invariable below 15 mK. In the same iron sample the nuclei of57Fe and119Sn had different Mössbauer temperatures below 15 mK. The reasons for this phenomenon are not yet clear.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Nov 3, 2004

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