Particle-hole strength excited in the /sup 48/Ca(p,n)/sup 48/Sc reaction at 134 and 160 MeV: Gamow-Teller strength

Journal Article · Mon Apr 01 00:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.1161· OSTI ID:6023967

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

Gamow-Teller strength in the /sup 48/Ca(p,n)/sup 48/Sc reaction was studied at 134 and 160 MeV. Neutron energy spectra were measured by the time-of-flight technique with resolutions of about 320 and 460 keV, respectively. The cross sections reported at 160 MeV are increased (by a factor of about 1.4) from results reported previously. The 1/sup +/ Gamow-Teller strength is observed to be split into a low-lying state at E/sub x/ = 2.52 MeV, the Gamow-Teller giant resonance in a complex of states between 4.5 and 14.5 MeV, and a single T = 4 state at 16.8 MeV. The general distribution of the 1/sup +/ strength in /sup 48/Sc is in good agreement with a shell-model prediction. The total 1/sup +/ strength observed in discrete states amounts to 43% of the simple Gamow-Teller sum rule, relative to the observed 0/sup +/, Fermi strength assumed to be concentrated into the isobaric analog state at 6.67 MeV. Consideration of the ..delta..l = 0 contributions to the background under the Gamow-Teller giant resonance and of the non-quasifree scattering contributions to the continuum (up to about 30 MeV) increases this fraction to about 70%. Possible Gamow-Teller strength in the quasifree scattering contributions to the continuum is discussed.

• Research Organization: Department of Physics, Kent State University, Kent, Ohio 44242
• OSTI ID: 6023967
• Journal Information: Phys. Rev. C; (United States), Vol. 31:4
• 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
GAMOW-TELLER RULES
GIANT RESONANCE
ISOBARIC ANALOGS
IU CYCLOTRON
MEV RANGE 100-1000
NEUTRON SPECTRA
PARITY
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SHELL MODELS
SPIN
SUM RULES
ACCELERATORS
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DAYS LIVING RADIOISOTOPES
ENERGY RANGE
EQUATIONS
HADRON REACTIONS
INTERMEDIATE MASS NUCLEI
ISOCHRONOUS CYCLOTRONS
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
RESONANCE
SCANDIUM ISOTOPES
SPECTRA
TARGETS
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