Polarization in neutron-proton scattering at 29.6 MeV

Journal Article · Mon Dec 01 04:00:00 EST 1975 · Phys. Rev., C, v. 12, no. 6, pp. 1717-1722

DOI:https://doi.org/10.1103/PhysRevC.12.1717· OSTI ID:4103848

Eldred, R A; Bonner, B E; Cahill, T A

The polarization in neutron-proton scattering at 29.6 MeV was deduced from asymmetries measured at every 10 degree c.m. from 50 to 150 degree c.m. The incident neutron beam was derived from a high-pressure deuterium gas cell via the $sup 2$H(d, n)$sup 3$He reaction at 37 degree c.m. The beam passed through a spin rotation magnet and, at the target location 5.4 m from the gas cell, possessed a flux of 5 times 10$sup 5$ n/sec and a polarization of 0.32 plus-or- minus 0.04. Data between 50 and 110 degree c.m. were obtained using scintillating CH target in coincidence with neutron detectors, while data between 120 and 150 degree c.m. were obtained using recoil protons from a CH$sub 2$ target. Total errors in the derived polarizations ranged from plus-or-minus 0.007 to plus-or-minus 0.022. These data agree very well with three previous values measured near 30 MeV at Los Alamos, but they disagree with Harwell data indicating small or negative polarizations near 150 degree c.m. The present results agree well with predictions of the Livermore X and Yale IV phase shift sets, but slightly favor the former. (AIP)

• Research Organization: Crocker Nuclear Laboratory and the Department of Physics, University of California, Davis, California 95616
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-018795
• OSTI ID: 4103848
• Journal Information: Phys. Rev., C, v. 12, no. 6, pp. 1717-1722, Journal Name: Phys. Rev., C, v. 12, no. 6, pp. 1717-1722; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

*HYDROGEN 1-- NEUTRON REACTIONS
*PROTON-NEUTRON INTERACTIONS-- POLARIZATION
641805*
ASYMMETRY
MEV RANGE 10-100
N64130 --Physics (High Energy)--Particle Interactions & Properties (Experimental)--Strong (Baryon-induced)
N68251* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
A <= 5--Nuclear Reactions & Scattering
POLARIZED BEAMS