Abstract
A 145Pm (t1/2=17.7y) radiation source intended for 145Nd Mössbauer spectroscopy has been produced by the reaction 146Nd(p,2n )145Pm. Concurrent reactions lead to a very high background radiation level in the energy range of the Mossbauer line at 67.1 keV. The source will only be usable for Mossbauer spectroscopy after several years when the nuclei causing the background have decayed. 155Gd Mössbauer spectra were obtained for a Gd2Fe14B single crystal absorber in the temperature range 4.2 K to 120 K. The results indicate different variations of Gd moments at the 2 inequivalent Gd sites with temperature. A programme has been written for simultaneous fits to a series of Mössbauer spectra taken with an absorber at several temperatures in terms of crystal and exchange fields acting on the 4f electrons. The programme has been applied to the evaluation of 174Yb Mössbauer spectra of Yb2Fe14B in the temperature range 4.2 K to 125 K.
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References
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© 1989 ECSC, EEC, EAEC, Brussels and Luxembourg
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Czjzek, G., Bornemann, HJ. (1989). Development of 157Gd and 145Nd Mössbauer Resonances. In: Mitchell, I.V., Coey, J.M.D., Givord, D., Harris, I.R., Hanitsch, R. (eds) Concerted European Action on Magnets (CEAM). Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1135-2_27
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DOI: https://doi.org/10.1007/978-94-009-1135-2_27
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