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

Abstract

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.

Authors:
 [1];  [2];  [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)
Publication Date:
OSTI Identifier:
7134092
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (USA)
Additional Journal Information:
Journal Volume: 41:1; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Reidemeister, G, Ohkubo, S, and Michel, F. Alpha-cluster spectroscopy in sup 40 Ca and in the sd -shell closure region. United States: N. p., 1990. Web. doi:10.1103/PhysRevC.41.63.
Reidemeister, G, Ohkubo, S, & Michel, F. Alpha-cluster spectroscopy in sup 40 Ca and in the sd -shell closure region. United States. doi:10.1103/PhysRevC.41.63.
Reidemeister, G, Ohkubo, S, and Michel, F. Mon . "Alpha-cluster spectroscopy in sup 40 Ca and in the sd -shell closure region". United States. doi:10.1103/PhysRevC.41.63.
@article{osti_7134092,
title = {Alpha-cluster spectroscopy in sup 40 Ca and in the sd -shell closure region},
author = {Reidemeister, G and Ohkubo, S and Michel, F},
abstractNote = {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.},
doi = {10.1103/PhysRevC.41.63},
journal = {Physical Review, C (Nuclear Physics); (USA)},
issn = {0556-2813},
number = ,
volume = 41:1,
place = {United States},
year = {1990},
month = {1}
}