Over the entire range of temperatures which are accessible to Mössbauer studies, it is possible to regulate temperature to better than 1 part in 104. The use of thermocouples for electronic measurement and control is useful above 10°K. In the region from 0.03 to 20°K, germanium and carbon resistance thermometry is convenient and reliable. Over limited temperature ranges, very precise regulation is available through control of the vapor pressure above a cryogen. The resistance-bridge and temperature-control unit for the 0.03°K dilution refrigerator in operation at Los Alamos is discussed. Co57 Mössbauer thermometry below 1.0°K is also discussed.
KeywordsDilution Refrigerator Limited Temperature Range Zeeman Level Mossbauer Effect Iron Absorber
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- 1.J. G. Dash, R. D. Taylor, P. P. Craig, D. E. Nagle, D. R. F Cochran, and W. E. Keller, Phys. Rev. Letters 5: 152 (1960)Google Scholar
- R. P. Taylor: Proceedings of the Second International Conference on the Mossbauer Effect, D. M. J. Compton and A. H. Schoen, eds. (John Wiley and Sons, New York, 1962 ), p. 203.Google Scholar
- 2.R. S. Preston, Phys. Rev, Letters 19:75 (1967) and references therein.Google Scholar
- 5.Nut. Bur. Std. (U.S.), Circ. 561. These tables are in Leeds and Northrup Co., Philadelphia, Penna., Booklet No. 07789.Google Scholar
- 6.H. Suhl and D. Wong, Physics 3: 17 (1967).Google Scholar
- 7.P. P. Craig, in: Mössbauer Effect Methodology, Vol. 1, I. J. Gruverman, ed. ( Plenum Press, New York, 1965 ), p. 135Google Scholar
- E. Elad and M. Nakamura, IEEE Transactions in Nuclear Science, N.S.-15, No. 1 (1963).Google Scholar