Effect of high spin states on fusion in heavy ion collisions

Journal Article · Sun Nov 01 04:00:00 EST 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.36.1860· OSTI ID:5943248

Rajasekaran, M; Arunachalam, N; Devanathan, V

The behavior of very high rotational states of the highly excited compound nuclear systems formed in fusion reactions is studied in the framework of the statistical theory. The very high spin states populated in these reactions results in the observation of phenomena like backbending and yrast traps. The experimental data on the angular momentum limitation on fusion probability are reproduced at higher entropy values. Shape transitions are observed for the systems /sup 12/C+/sup 12/C, /sup 16/O+/sup 16/O, /sup 18/O+/sup 18/O, and /sup 40/Ca+/sup 40/Ca. We predict a shift in the yrast minima towards higher angular momentum states in the case of /sup 40/Ca+/sup 40/Ca with the increase in the excitation energy and the entropy of the compound nuclear system. Lines of constant entropy or constant level density are found to be almost equally spaced.

• Research Organization: Department of Nuclear Physics, University of Madras, Guindy Campus, Madras 600 025, India
• OSTI ID: 5943248
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 36:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40 REACTIONS
CALCIUM 40 TARGET
CARBON 12 REACTIONS
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
COMPOUND NUCLEI
DEFORMED NUCLEI
ENERGY LEVELS
ENERGY-LEVEL DENSITY
ENTROPY
EXCITED STATES
FUNCTIONS
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
HIGH SPIN STATES
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16 REACTIONS
OXYGEN 16 TARGET
OXYGEN 18 REACTIONS
OXYGEN 18 TARGET
PARTITION FUNCTIONS
PHYSICAL PROPERTIES
ROTATIONAL STATES
STATISTICAL MODELS
TARGETS
THERMODYNAMIC PROPERTIES
YRAST STATES