Channel-coupling effects in the resonating-group study of the seven-nucleon system

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

DOI:https://doi.org/10.1103/PhysRevC.28.1869· OSTI ID:5335683

Fujiwara, Y; Tang, Y C

A three-channel resonating-group calculation is performed to study the effects of channel coupling on the properties of the /sup 3/H+..cap alpha.. system. The channels included are /sup 3/H+..cap alpha.., n+ /sup 6/Li, and n+ /sup 6/Li( channels, with /sup 6/Li and /sup 6/Li( described by (1s)/sup 4/(1p)/sup 2/ harmonic-oscillator functions representing d+..cap alpha.. cluster configurations with relative orbital angular momenta equal to 0 and 2, respectively. By comparing with the /sup 3/H+..cap alpha.. single-channel result, it is found that the three-channel calculation improves the L = 1 ground state energy by 0.68 MeV and yields additional features such as cusps in the L = 0 and 2 phase shifts and a dispersionlike resonance structure in the L = 1 phase shift. In addition, it is noted that, in states with larger L values, the n+ /sup 6/Li( aligned configurations make particularly important contributions. Characteristics of nucleon-exchange terms have also been briefly investigated; here one finds that, as far as the /sup 3/H+..cap alpha.. system is concerned, the important one-exchange and core-exchange contributions are only weakly affected by the presence of other channels.

• Research Organization: School of Physics, University of Minnesota, Minneapolis, Minnesota 55455
• OSTI ID: 5335683
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651215* -- Nuclear Properties & Reactions
A=1-5
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA REACTIONS
ANGULAR MOMENTUM
BARYONS
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
COUPLED CHANNEL THEORY
ELEMENTARY PARTICLES
ENERGY LEVELS
FERMIONS
HADRONS
HARMONIC OSCILLATOR MODELS
ISOTOPES
LIGHT NUCLEI
LITHIUM 6
LITHIUM ISOTOPES
MATHEMATICAL MODELS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
PHASE SHIFT
RESONATING-GROUP METHOD
SPIN
STABLE ISOTOPES
TARGETS
TRITIUM TARGET
VARIATIONAL METHODS