摘要:

The classical theory of ion‐ion recombination in gases of high density is extended to allow for arbitrary ratios of the masses of the three species involved. Calculations are performed for the recombination of Ar+, Ar+2, Kr+, and Kr+2ions with F−and of Hg+and Ar+with Cl−in an argon gas. The effective two‐body rates peak between 2×10−6and 3×10−6cm3 sec−1at pressures above 1 atm.

ISSN:0003-6951    

DOI:10.1063/1.89846

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

In this investigation we report on superconducting properties ofinsituformed multifilamentary Cu‐Nb3Sn composites produced by a powder‐metallurgical technique. The wires contain 10 wt% Nb in Cu–1 wt% Sn and consist of discontinuous superconducting filaments embedded in a normal‐conducting matrix. They can carry resistanceless currents exceeding 105A/cm2(at zero field and 4.2 K). The critical current density depends strongly on the reduction of the cross section by wire drawing, the annealing temperature, and the tin content. The superconducting properties of these wires are uniform and insensitive to bending.

ISSN:0003-6951    

DOI:10.1063/1.89815

出版商:AIP    

年代:1978

数据来源: AIP