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Author Shanmugam, G. ♦ Sankar, K. ♦ Ramamurthi, K.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HOT NUCLEI ♦ NUCLEAR STRUCTURE ♦ SHELL MODELS ♦ PHASE TRANSFORMATIONS ♦ SHAPE ♦ FLUCTUATIONS ♦ TEMPERATURE DEPENDENCE ♦ SPIN ♦ FREE ENERGY ♦ GROUND STATES ♦ DIPOLES ♦ GIANT RESONANCE ♦ EXCITED STATES
Abstract Landau theory of phase transitions is used to determine the shape evolution of even-even {ital s}-{ital d} shell nuclei with temperature and spin. Further in this study, the most important statistical thermal shape fluctuations are also incorporated. The constants appearing in the Landau expression for the free energy are determined by using the free energy surfaces at {omega}=0 calculated by the finite temperature Strutinsky and summation methods. The pairing effect is included at ground state but shown to be of minor importance in shape determination. It is seen that the averaged shapes for the above nuclei at different temperatures and spins are mostly triaxial which are quite different from the most probable shapes, prolate or oblate. Only these averaged shapes can be seen through the study of giant dipole resonance decays of highly excited states.
ISSN 05562813
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-09-01
Publisher Place United States
Journal Physical Review, C
Volume Number 52
Issue Number 3


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