Nuclear shape transitions at finite temperature

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.1599· OSTI ID:6445246

Miller, H G; Quick, R M; Cole, B J

Changes in shape in /sup 24/Mg are studied at Tnot =0 both in finite-temperature mean-field calculations and in the exact canonical ensemble. With increasing temperature the canonical ensemble average of the rotational energy spectrum tends toward a more equispaced harmonic spectrum. This deformed to spherical transition gives rise to a peak in the specific heat which is also seen in finite-temperature Hartree-Fock approximation albeit at a slightly higher temperature. The canonical ensemble average of the quadrupole moment does not, however, appear to vanish at the critical temperature as is the case in the finite-temperature Hartree-Fock approximation.

• Research Organization: Department of Physics, University of Pretoria, Pretoria 0002, South Africa
• OSTI ID: 6445246
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
CRITICAL TEMPERATURE
DEFORMATION
ENERGY LEVELS
ENERGY SPECTRA
EVEN-EVEN NUCLEI
EXCITED STATES
HARTREE-FOCK METHOD
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
MEAN-FIELD THEORY
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEI
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUADRUPOLE MOMENTS
ROTATIONAL STATES
SHELL MODELS
SPECIFIC HEAT
SPECTRA
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE