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Structural connection of highly deformed shape isomeric states in [sup 28]Si, [sup 24]Mg, and [sup 20]Ne by alpha-alpha coincidence studies in [sup 12]C([sup 16]O,[alpha])[sup 24]Mg[sup *][r arrow][alpha]+[sup 20]Ne[sup *]

Journal Article · · Physical Review, C (Nuclear Physics); (United States)
; ; ; ; ; ; ;  [1]
  1. Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay 400 085 (India)
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Alpha-alpha coincidence measurements have been made in the reaction [sup 12]C([sup 16]O,[alpha])[sup 24]Mg[sup *][r arrow][alpha]+[sup 20]Ne[sup *] at the bombarding energy of [ital E]([sup 16]O)=63 MeV corresponding to the resonance in the [sup 12]C+[sup 16]O system at [ital E][sub c.m.]=26.9 MeV leading to the compound nuclear state at 43.7 MeV in [sup 28]Si. The coincidence alphas are detected, one at 0[degree] to the beam and the other at 20[degree] to 80[degree] in steps of 10[degree]. The spins of the states in [sup 24]Mg at 20.2 and 21.4 MeV are fed strongly at this resonance are inferred to be [ital J][ge]8 from the branching of these states to the states in the ground state band of [sup 20]Ne. From the result it is deduced that these states of [sup 24]Mg do not correspond to the near Coulomb barrier resonances in the [sup 12]C+[sup 12]C system. In addition, the coincidence measurements also lead to the result that the states of [sup 24]Mg in the 20--22 MeV region fed at the resonance preferentially decay to the eight-particle--four-hole states of [sup 20]Ne near 7.2 MeV. These results establish the structural connection of highly deformed shape isomeric states in the region of [epsilon]=1.17 to 1.35 and [gamma]=50[degree] to 60[degree] in [sup 28]Si, [sup 24]Mg, and [sup 20]Ne expected from the Nilsson-Strutinsky calculations of Leander and Larsson.
OSTI ID:
6953215
Journal Information:
Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:3; ISSN 0556-2813; ISSN PRVCAN
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY
ALPHA PARTICLES
CARBON 12 REACTIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
COINCIDENCE METHODS
COMPOUND NUCLEI
COUNTING TECHNIQUES
DECAY
DEFORMATION
DEFORMED NUCLEI
ENERGY RANGE
EVEN-EVEN NUCLEI
HEAVY ION REACTIONS
ISOMERIC NUCLEI
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NEON 20
NEON ISOTOPES
NUCLEAR DECAY
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16 TARGET
RESONANCE
SILICON 28
SILICON ISOTOPES
STABLE ISOTOPES
STRUTINSKY THEORY
TARGETS