Polarization transfer in quasifree ( [ital [rvec p]],[ital [rvec n]] ) reactions at 495 MeV

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.2159· OSTI ID:6611094

Chen, X Y; Taddeucci, T N; McClelland, J B; Carey, T A; Byrd, R C; Rybarcyk, L J; Sailor, W C; Mercer, D J; Prout, D L; DeLucia, S; Luther, B; Marchlenski, D G; Sugarbaker, E; Rapaport, J; Guelmez, E; Whitten, Jr, C A; Goodman, C D; Huang, W; Wang, Y; Alford, W P ^[1]

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1. University of Colorado, Boulder, Colorado 80309 (United States) Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) The Ohio State University, Columbus, Ohio 43210 (United States) Ohio University, Athens, Ohio 45701 (United States) University of California, Los Angeles, California 90024 (United States) Indiana University Cyclotron Facility, Bloomington, Indiana 47405 (United States) University of Western Ontario, London, Ontario, N6A 3K7 (Canada)

A complete set of polarization-transfer observables has been measured for quasifree ([ital [rvec p]],[ital [rvec n]]) reactions on [sup 2]H, [sup 12]C, and [sup 40]Ca at a bombarding energy of 495 MeV and a laboratory scattering angle of 18[degree]. The data span an energy-loss range from 0 to 160 MeV, with a corresponding momentum transfer range of [ital q][sub c.m.]=1.7--1.9 fm[sup [minus]1]. The laboratory observables are used to construct partial cross sections proportional to the nonspin response and three orthogonal spin responses. These results are compared to the transverse spin response measured in deep inelastic electron scattering and to nuclear responses based on the random phase approximation. The polarization observables for all three targets are remarkably similar and reveal no evidence for an enhancement of the spin-longitudinal nuclear response relative to the spin-transverse response. These results suggest the need for substantial modifications to the standard form assumed for the residual particle-hole interaction.

• OSTI ID: 6611094
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BEAMS
CALCIUM 40 TARGET
CARBON 12 TARGET
CHARGE EXCHANGE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERIUM TARGET
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON REACTIONS
HADRONS
INELASTIC SCATTERING
INTEGRAL CROSS SECTIONS
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
POLARIZED BEAMS
POLARIZED PRODUCTS
PROTON REACTIONS
QUASI-FREE REACTIONS
RANDOM PHASE APPROXIMATION
SCATTERING
TARGETS