The system of bose liquid + impurity is considered. The energy spectrum, as well as effective mass of impurity is calculated. For the case of an 3 He atom in superfluid 4 He numerical calculations are performed.

Here we present a new approximation for calculation of density of states of multi-component metallic alloys using Lloyd formula. We consider the average square of T-matrix as the pair replication of scattering system. The analytical expressions are probed on TixMn 1−x and AlxNi 1−x binary alloys. The results are in good agreement with the predicted behavior of density of states for such systems.

No abstract