Accession Number : AD0734876

Title :   Scattering of Polarized 3 MeV Neutrons from 3He,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Hollandsworth,C. E. ; Gilpatrick,M. ; Bucher,W. P.

Report Date : NOV 1971

Pagination or Media Count : 23

Abstract : Partially polarized 3 MeV neutrons have been scattered from 3He contained in a high-pressure gaseous scintillation cell. The resulting asymmetry in the elastic scattering was determined for seven scattering angles from 40 degrees to 120 degrees (lab). Time-of-flight techniques and neutron-gamma ray discrimination in the side detectors were used for background reduction. The measured asymmetry is small for angles less than 60 degrees (lab) and reaches a maximum value at approximately 110 degrees (c.m.). The maximum asymmetry determined from the present experiment corresponds to a polarization of + 0.50. The differential polarization can be fitted within experimental uncertainties by assuming that D-wave effects are negligible. The principal features of the data are qualitatively reproduced by Dodder's reaction-matrix calculations which use the Werntz-Meyerhof level parameters for 4He. (Author)

Descriptors :   (*NEUTRON SCATTERING, *HELIUM), POLARIZATION, NEUTRON CROSS SECTIONS, ELASTIC SCATTERING, SCINTILLATION COUNTERS

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE