Alpha-cluster spectroscopy in sup 40 Ca and in the sd -shell closure region

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.63· OSTI ID:7134092

Reidemeister, G ^[1]; Ohkubo, S ^[2]; Michel, F ^[3]

---

1. Physique Nucleaire Theorique et Physique Mathematique, Universite Libre de Bruxelles, B-1050 Bruxelles, (Belgium)
2. Department of Applied Science, Kochi Women's University, Kochi 780, (Japan)
3. Faculte des Sciences, Universite de l'Etat, B-7000 Mons, (Belgium)

The low-energy {sup 36}Ar({alpha},{alpha}) elastic scattering data of Gaul {ital et} {ital al}. are analyzed within the frame of the optical model, using energy-independent Woods-Saxon squared or model-independent geometries for the real part of the potential. The optical-model scattering amplitude is decomposed into its barrier and internal wave components to understand the rapid and complicated evolution of the angular distributions with incident energy. The properties of the low-energy bound and quasibound states supported by this potential are compared with those of the states of the deformed 4p-4h rotational band in {sup 40}Ca, built on the {ital J}{sup {pi}}=0{sup +}, {ital E}{sub {ital x}}=3.35 MeV state. The possibility of extending this local potential model approach to neighboring nuclei near the {ital sd}-shell closure is discussed. A negative-parity band of states with appreciable {alpha}-cluster character, starting around the {alpha}-particle threshold, is expected to be systematically present in this mass region.

• OSTI ID: 7134092
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Vol. 41:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ELASTIC SCATTERING
ARGON 36 TARGET
CALCIUM 40
ROTATIONAL STATES
ALPHA SPECTROSCOPY
ANGULAR DISTRIBUTION
BOUND STATE
CLUSTER MODEL
OPTICAL MODELS
PARITY
SCATTERING AMPLITUDES
SHELL MODELS
SPIN
WOODS-SAXON POTENTIAL
ALKALINE EARTH ISOTOPES
AMPLITUDES
ANGULAR MOMENTUM
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ENERGY LEVELS
EVEN-EVEN NUCLEI
EXCITED STATES
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEI
PARTICLE PROPERTIES
POTENTIALS
SCATTERING
SPECTROSCOPY
STABLE ISOTOPES
TARGETS
651420* - Nuclear Properties & Reactions
A=20-38
Experimental
651520 - Nuclear Properties & Reactions
A=39-58
Experimental