Abstract
The probability of recoilless absorption for Pd0.95Sn0.05 was found to be nearly independent of pressure. This result has been interpreted using the neutron determined phonon density of states and the Mannheim impurity model (1972). The Pd-Sn force constant is found to be greater than the Pd-Pd nearest-neighbour force constant. The pressure dependence of the electron density at 119Sn is the same when the Sn is in Pd0.95Sn or Pd(12% wt Sn), consistent with the simple rigid-band model. Both the recoilless fraction and the electron density at 119Sn nuclei changed more with pressure in Pd3Sn than in Pd0.95Sn0.05.
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