Gamow-Teller strength in the /sup 18/O(p,n) /sup 18/F reaction at 135 MeV

Journal Article · Fri Apr 01 04:00:00 EST 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.27.1387· OSTI ID:6081941

Anderson, B D; Fazely, A; McCarthy, R J

The distribution of Gamow-Teller strength in the /sup 18/O(p,n) /sup 18/F reaction was studied at a bombarding energy of 135 MeV. Five 1/sup +/, T = 0 states are identified below E/sub x/ = 7 MeV and a concentration of 1/sup +/ states of presumed T = 1 character is observed between E/sub x/ = 9.5 and 12 MeV. Approximately 82% of the 1/sup +/ strength is concentrated into the ground-state transition and only 5.5% is seen in the T = 1 component. Normalization of the ground-state transition to the known Gamow-Teller matrix element from the analogous beta decay of /sup 18/Ne allows the (p,n) cross sections to be related to the Gamow-Teller strength. The resulting total Gamow-Teller strength observed in the (p,n) reaction is about two-thirds of the minimum value required by the sum rule for a T = 1 nucleus. This result is in reasonable agreement with the total Gamow-Teller strength predicted from a shell-model calculation which uses empirically renormalized single-particle Gamow-Teller matrix elements. The concentration of the T = 0 strength predominantly into the ground state and the observed ratio of T = 1 to T = 0 strength also are consistent with these calculations.

• Research Organization: Department of Physics, Kent State University, Kent, Ohio 44242
• OSTI ID: 6081941
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 27:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ENERGY LEVELS
ENERGY RANGE
FLUORINE 18
FLUORINE ISOTOPES
GAMOW-TELLER RULES
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-ODD NUCLEI
OXYGEN 18 TARGET
PROTON REACTIONS
RADIOISOTOPES
SHELL MODELS
SPECTRA
TARGETS