Resonance extractions in the {alpha}+{sup 8}He slow scattering

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.014608· OSTI ID:21596588

Ito, Makoto ^[1]; Suzuki, Daisuke ^[2]

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1. Pure and Applied Physics, Kansai University, Yamate-cho 3-3-35, Suita 564-8680 (Japan)
2. National Superconducting Cyclotron Laboratory, Michigan State University, 1 Cyclotron, East Lansing, Michigan 48824-1321 (United States)

The {alpha}+{sup 8}He low-energy reactions and the exotic structures of {sup 12}Be={alpha}+{alpha}+4N are studied by the application of the generalized two-center cluster model. In the two-neutron transfer reactions, {alpha}+{sup 8}He{sub g.s.}{yields}{sup 6}He{sub g.s.}+{sup 6}He{sub g.s.}, resonant structures with a sharp width of {Gamma}<1 MeV appear in the central collision (J{sup {pi}=}0{sup +}). The reaction mechanism is analyzed, and we confirmed that the transfer coupling plays essential roles in the resonance formation with sharp width. Angular distributions for the scattered {sup 6}He are analyzed to extract resonant structures for individual partial waves. We found that, for the low-spin resonances, the angular selection around 90 deg. in the center-of-mass system, which is usually employed in the high-spin resonances of light-ion systems, is not necessarily appropriate to separate the resonance contribution with a definite spin. The validity of the selection angle around 90 deg. is discussed in the higher partial waves.

• OSTI ID: 21596588
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 1; Other Information: DOI: 10.1103/PhysRevC.84.014608; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
BERYLLIUM 12
CENTER-OF-MASS SYSTEM
CLUSTER MODEL
COLLISIONS
COUPLING
EXTRACTION
HELIUM 6
HELIUM 8
LIGHT IONS
NEUTRON TRANSFER
PARTIAL WAVES
REACTION KINETICS
RESONANCE
SCATTERING
SPIN
TRANSFER REACTIONS
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DIRECT REACTIONS
DISTRIBUTION
EVEN-EVEN NUCLEI
HELIUM ISOTOPES
IONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MATHEMATICAL MODELS
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
SEPARATION PROCESSES