Measurement of spin observables in the sup 28 Si( rvec p , rvec p prime ) reaction at 500 MeV and comparison with the distorted-wave impulse approximation

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.43.213· OSTI ID:6254417

Donoghue, E; Glashausser, C; Hintz, N; Sethi, A; Shepard, J; Fergerson, R; Franey, M; Gazzaly, M; Jones, K; McClelland, J; Nanda, S; Plum, M ^[1]

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1. Serin Physics Laboratory, Rutgers University, Piscataway, New Jersey 08854 (US) School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 Department of Physics, University of Colorado, Boulder, Colorado 80309 Los Alamos Meson Physics Facility, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Analyzing power {ital A}{sub {ital y}} and spin-transfer observables {ital D}{sub {ital i}{ital j}} have been measured for 500-MeV proton inelastic scattering from {sup 28}Si. Measured values of the {ital D}{sub {ital i}{ital j}} for the 9.70-MeV 5{sup {minus}}, {ital T}=0, the 11.58-MeV 6{sup {minus}}, {ital T}=0, and the 14.35-MeV 6{sup {minus}}, {ital T}=1 states are reported at 17{degree} and 22{degree}; values of {ital A}{sub {ital y}} cover the range from about 10{degree} to 26{degree}. Nonrelativistic (NRIA) and relativistic (RIA) impulse-approximation calculations are compared with the data. The differences between the two types of calculations are generally small. The RIA yields excellent agreement with the {ital D}{sub {ital i}{ital j}} data for the 5{sup {minus}} state, and both RIA and NRIA do well for {ital D}{sub {ital i}{ital j}} data for the 6{sup {minus}}, {ital T}=0 state but poorly for the 6{sup {minus}}, {ital T}=1 state. For the {ital A}{sub {ital y}} data, both types of calculation give fairly good predictions for the 5{sup {minus}} and 6{sup {minus}}, {ital T}=1 states, but not for the 6{sup {minus}}, {ital T}=0 state. Comparison between theory and experiment for the combinations of observables {ital D}{sub {ital K}}, which are sensitive to individual terms in the nucleon-nucleon interaction, indicates a possible need for medium corrections in the {ital T}=1 tensor and spin-orbit forces.

• OSTI ID: 6254417
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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Moments
Spin
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BEAMS
CHARGED-PARTICLE REACTIONS
COUPLING
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
DISTRIBUTION
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FIELD THEORIES
GENERAL RELATIVITY THEORY
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
IMPULSE APPROXIMATION
INELASTIC SCATTERING
INTERACTIONS
INTERMEDIATE COUPLING
ISOTOPES
L-S COUPLING
LIGHT NUCLEI
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
OPTICAL MODELS
PARITY
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
POLARIZED BEAMS
POLARIZED PRODUCTS
PROTON REACTIONS
RELATIVITY THEORY
SCATTERING
SILICON 28
SILICON 28 TARGET
SILICON ISOTOPES
SPECTROSCOPIC FACTORS
SPIN
STABLE ISOTOPES
TARGETS