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 04:00:00 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), Journal Name: Phys. Rev. C; (United States) Vol. 31:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCIUM 48 TARGET
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DAYS LIVING RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
EQUATIONS
GAMOW-TELLER RULES
GIANT RESONANCE
HADRON REACTIONS
INTERMEDIATE MASS NUCLEI
ISOBARIC ANALOGS
ISOCHRONOUS CYCLOTRONS
ISOTOPES
IU CYCLOTRON
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
PROTON REACTIONS
RADIOISOTOPES
RESONANCE
SCANDIUM 48
SCANDIUM ISOTOPES
SHELL MODELS
SPECTRA
SPIN
SUM RULES
TARGETS