Gamow-Teller strength in the /sup 26/Mg(p,n)/sup 26/Al reaction at 135 MeV and its fractionation into T = 0, 1, and 2 isospin channels

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.35.2011· OSTI ID:5943989

Madey, R; Flanders, B S; Anderson, B D; Baldwin, A R; Lebo, C; Watson, J W; Austin, S M; Galonsky, A; Wildenthal, B H; Foster, C C

The excitation-energy distribution of transition strength to 1/sup +/ states excited via the /sup 26/Mg(p,n)/sup 26/Al reaction at 134.4 MeV was measured for excitation energies up to 25 MeV. The structures observed in the neutron spectra with ..delta..L = 0 angular distributions were identified as 1/sup +/ states, except for the isobaric analog transition. The total 1/sup +/ strength in this reaction was extracted by normalizing the intensity of the four lowest 1/sup +/ states to the strength measured for the analogous beta decays to these states. A detailed comparison of the experimental results with known analogous transitions and with a large-basis shell-model calculation leads to the conclusion that strengths to states of isospin T = 0, 1, and 2 were observed in this reaction. The apportionment of the observed strength among the three isospin values is compared with the shell-model prediction. The total strength observed to all states below an excitation energy of 15 MeV is 57 percent of the total strength predicted by the shell-model calculation with the assumption of the ''free-nucleon'' normalization of the Gamow-Teller beta decay operator.

• Research Organization: Department of Physics, Kent State University, Kent, Ohio 44242
• OSTI ID: 5943989
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 35:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALUMINIUM 26
ALUMINIUM ISOTOPES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DECAY
DISTRIBUTION
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
GAMOW-TELLER RULES
HADRON REACTIONS
INFORMATION
ISOBARIC ANALOGS
ISOCHRONOUS CYCLOTRONS
ISOSPIN
ISOTOPES
IU CYCLOTRON
LIGHT NUCLEI
MAGNESIUM 26 TARGET
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
PROTON REACTIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPECTRA
SPIN
TARGETS
TIME-OF-FLIGHT METHOD
YEARS LIVING RADIOISOTOPES