Analyzing-power measurements in the /sup 48/Ca(p,n)/sup 48/Sc reaction at 134 MeV

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.34.422· OSTI ID:5490528

Anderson, B D; Chittrakarn, T; Baldwin, A R; Fazely, A; Lebo, C; Madey, R; Watson, J W; Foster, C C

Analyzing-power measurements were performed for the /sup 48/Ca(p,n)/sup 48/Sc reaction at 134 MeV in about 6/sup 0/ steps from 0/sup 0/ to 60/sup 0/. The overall neutron energy resolution varied from about 400 keV for angles out to 42/sup 0/ to about 700 keV at wider angles. Analyzing-power angular distributions were extracted for the (..pi..f-italic/sub 7/2/,..nu..f-italic/sub 7/2//sup -1/) octet of states, the 1/sup +/ Gamow-Teller giant resonance, and the T-italic = 4, 1/sup +/ state at E-italic/sub x-italic/ = 16.8 MeV. All of these angular distributions are described reasonably well by ''standard'' distorted-wave impulse approximation calculations. A qualitative difference is observed in the analyzing power between the transitions to the low-lying 0/sup +/ and 1/sup +/ states compared to the transition to the high-lying 1/sup +/ state. This difference appears to be associated with a sensitivity to the predominant particle-hole structure of the final states, viz., (..pi..f-italic/sub 7/2/,..nu..f-italic/sub 7/2//sup -1/) versus (..pi..f-italic/sub 5/2/,..nu..f-italic/sub 7/2//sup -1/). This sensitivity is ascribed to the difference in nonlocality contributions to the two different 1p1h excitations. Excitation-energy plots of the analyzing power were extracted at each angle. No characteristic signature of spin-transfer strength is observed in the region of the Gamow-Teller giant resonance.

• Research Organization: Department of Physics, Kent State University, Kent, Ohio 44242
• OSTI ID: 5490528
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 34:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANALYZING POWER
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
BEAMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCIUM 48 TARGET
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DAYS LIVING RADIOISOTOPES
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GAMOW-TELLER RULES
GIANT RESONANCE
HADRON REACTIONS
HADRONS
IMPULSE APPROXIMATION
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOCHRONOUS CYCLOTRONS
ISOTOPES
IU CYCLOTRON
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
POLARIZED BEAMS
PROTON REACTIONS
RADIOISOTOPES
RESONANCE
SCANDIUM 48
SCANDIUM ISOTOPES
SPIN
TARGETS
TIME-OF-FLIGHT METHOD