Closed cycle He sorption refrigerators are an increasingly popular choice for remote cryogenic operations. The presence of a superfluid film on the inner walls of the evaporation pot limits their performance. We present a simple model of the gas, film, and heat flow in a He sorption refrigerator, taking into account the effects of an orifice to limit superfluid film flow. The model serves as a ...

Influence of asymmetry on superfluidity of nuclear matter with triplet–singlet pairing of nucleons (in spin and isospin spaces) is considered within the framework of a Fermi–liquid theory. Solutions of self–consistent equations for the critical temperature and the energy gap at T = 0 are obtained with the use of Skyrme effective nucleon interaction. It is shown, that if the chemical potentials ...

A convenient method to create vortices in meta-stable vortex-free superflow of 3 He-B is to irradiate with thermal neutrons. The vortices are then formed in a rapid non-equilibrium process with very distinctive characteristics. Two models were suggested to explain the phenomenon. One is based on the Kibble-Zurek mechanism of defect formation in a quench-cooled second order phase transition. The...

Structural effects in fission-product yields and neutron data for a large number of fissioning nuclei between Th and Rf from spontaneous fission to 14MeV-neutron-induced fission have been used to deduce information on the properties of the fissioning systems. Macroscopic properties are attributed to the compound nucleus, while fission channels are ascribed to shells in the nascent fragments. Us...