Abstract
The Mössbauer absorption spectrum of the 99-keV gamma ray of in platinum metal has been studied from 20 to 100°K. In a separate experiment to be published later, the internal-conversion coefficient was found to be . Using this value of the fraction of recoilless emission and recoilless absorption are , , and , . The half-life of the 99-keV level is sec in agreement with the electronic measurement sec. The Debye temperature determined from the Debye-Waller factor is in good agreement with a calculation based on the quasi-harmonic approximation. The Debye temperature extrapolates to K at 0°K and is essentially independent of temperature up to 100°K.
- Received 2 September 1964
DOI:https://doi.org/10.1103/PhysRev.137.A1101
©1965 American Physical Society