Clustering effects in a microscopic four-. alpha. description of the. alpha. + sup 12 C system

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.44.306· OSTI ID:5653482

Descouvemont, P ^[1]

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1. Physique Nucleaire Theorique et Physique Mathematique, Universite Libre de Bruxelles, Campus Plaine, Code Postal 229-B1050 Bruxelles, Belgium (BE)

The {alpha}+{sup 12}C system is investigated in the generator coordinate method, where the {sup 12}C nucleus is described by three {alpha} particles located on the apexes of an equilateral triangle. The {sup 12}C wave functions are projected out on the 0{sup +} and 2{sup +} states. By modifying the size of the triangle, we analyze the importance of clustering effects in {sup 12}C on {sup 16}O bound states, and on {alpha}+{sup 12}C phase shifts. These effects are found to be reduced when the total spin of the {alpha}+{sup 12}C system increases. The coupling between the {alpha}+{sup 12}C(0{sup +}) and {alpha}+{sup 12}C(2{sup +}) channels also decreases when {alpha} clustering is introduced in {sup 12}C. We obtain high-energy resonances in the {alpha}+{sup 12}C scattering. These resonances, located between 15 and 30 MeV in the center of mass, are suggested to be Pauli resonances, analog to the well-known forbidden states in the two-cluster model.

• OSTI ID: 5653482
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 44:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001 -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR MOMENTUM
BOUND STATE
CAPTURE
CARBON 12
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
ENERGY LEVELS
EVEN-EVEN NUCLEI
FUNCTIONS
GENERATOR-COORDINATE METHOD
HARMONIC OSCILLATOR MODELS
INELASTIC SCATTERING
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16
OXYGEN ISOTOPES
PARITY
PARTICLE PROPERTIES
PAULI PRINCIPLE
PHASE SHIFT
RESONANCE SCATTERING
SCATTERING
SPIN
STABLE ISOTOPES
TARGETS
WAVE FUNCTIONS