Gamow-Teller matrix elements from the /sup 11/B(p,n)/sup 11/C reaction at E/sub p/roughly-equal26 MeV

Journal Article · Wed May 01 00:00:00 EDT 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.1679· OSTI ID:5938939

Grimes, S M; Anderson, J D; Davis, J C; Howell, R H; Wong, C; Carpenter, A W; Carr, J A; Petrovich, F

New data are presented for the /sup 11/B(p,n)/sup 11/C reaction taken at 1 MeV intervals for proton bombarding energies in the E/sub p/ = 16--26 MeV range. In the experiment, final states in /sup 11/C up to E/sub x/approx. =10 MeV were clearly identified and differential cross sections were extracted for the first four levels in /sup 11/C. The E/sub p/ = 26 MeV data are examined in microscopic distorted-wave approximation calculations using the wave functions of Cohen and Kurath to describe the states in /sup 11/B and /sup 11/C and using the G matrix interaction of Bertsch et al. for the effective nucleon-nucleon interaction. Gamow-Teller matrix elements for transitions to excited states in /sup 11/C are extracted on the basis of these calculations, thus extending the information on Gamow-Teller matrix elements in the mass 11 systems beyond the ground state matrix element known from ..beta.. decay. Throughout, the results are contrasted with existing information from electromagnetic studies of /sup 11/B. It is concluded that the Cohen-Kurath model places too much Gamow-Teller strength in the low lying states of the mass 11 systems and not enough strength at higher excitation energies. In addition, this model underestimates the net contribution to M1 matrix elements from the isoscalar spin and current and isovector current parts of the M1 operator.

• Research Organization: Lawrence Livermore National Laboratory, Livermore, California 94550
• OSTI ID: 5938939
• Journal Information: Phys. Rev. C; (United States), Vol. 31:5
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BORON 11 TARGET
PROTON REACTIONS
CARBON 11
ENERGY LEVELS
CHARGE-EXCHANGE REACTIONS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
EXPERIMENTAL DATA
GAMOW-TELLER RULES
MATRIX ELEMENTS
MEV RANGE 10-100
NEUTRONS
NUCLEON-NUCLEON INTERACTIONS
SHELL MODELS
SPIN
ANGULAR MOMENTUM
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-ODD NUCLEI
FERMIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MINUTES LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
RADIOISOTOPES
TARGETS
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