Accession Number : AD0778374

Title :   Nonequilibrium Properties of Superconductivity Induced by Nuclear Radiation.

Descriptive Note : Rept. no. 2 (Final), 1 Apr 72-31 Jan 74,

Corporate Author : RESEARCH ADVISORY INST INC SOUTH LAGUNA CALIF*

Personal Author(s) : Dick,G. J. ; Mercereau,J. E. ; Owen,C. W. ; Scalapino,D. J. ; Shepard,K. W.

Report Date : 29 MAR 1974

Pagination or Media Count : 64

Abstract : The report is primarily an examination of certain of the dynamic effects associated with the interaction of energetic nuclear particles with the superconducting state. Also included is a brief discussion of the effects of thermal heating due to massive radiation on superconductivity. Calculations are done on the space-time evolution of the superconducting energy gap along a single particle track in a superconductor. These results are then applied to a Josephson tunnel junction in order to determine the time response of such a junction to nuclear impacts. Experimental results are reported on the dynamic response of superconducting Aluminum films to single 6 Mev alpha particles. It was found that the relaxation effects following nuclear impact, reported here, were probably dominated by ballistic phonon processes and had a temperature dependent relaxation time ranging from 10-100 nanoseconds. (Author)

Descriptors :   *Superconductors, *Radiation effects, *Nuclear radiation, Superconductivity, Josephson junctions, Tunneling(Electronics), Thin films, Aluminum, Charged particles, Gamma rays, X rays, Neutrons, Dynamic response

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE