Accession Number : AD0258208

Title :   TRANSFER OF HELICITY IN RADIATION AND ABSORPTION OF HIGH-ENERGY PHOTONS

Corporate Author : STANFORD UNIV CALIF

Personal Author(s) : PRATT,R.H.

Report Date : MAR 1961

Pagination or Media Count : 1

Abstract : Nearly complete transfer of momentum between a high-energy electron (or positron) and a photon in a Coulomb field implies that helicity is also transferred. This is not a consequence of conservation of total angular momentum but, rather, of spin angular momentum, and follows from a demonstration that it is possible to use freeparticle spinors (though not free wave functions) for the high-energy particles. Polarization correlations of the lower-energy particle in such a process are discussed. Applications are made to bremsstrahlung, pair production, photoeffect, and one-photon pair annihilation. (Author)

Descriptors :   *NUCLEAR REACTIONS, *NUCLEAR SPINS, *PHOTONS, ABSORPTION, BREMSSTRAHLUNG, ELECTRONS, HELIXES, NUCLEAR ENERGY LEVELS, NUCLEAR MOMENTS, NUCLEAR PHYSICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE