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

Journal Article · Fri Aug 01 00:00:00 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), Vol. 34:2
• Country of Publication: United States
• Language: English

Related Subjects

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