Exponential model with pairing attenuation and the backbending phenomenon

Journal Article · Sun Oct 01 04:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.1906· OSTI ID:6636553

Sood, P C; Jain, A K

Rotational energy calculations with an exponential dependence of the nuclear moment of inertia on pairing correlations coupled with an explicit spin dependence of the effective pairing gap analogous to that used in superconductivity give an excellent fit to the experimental data on excitation energies of yrast band levels in well-deformed even-even nuclei and also reproduce the backbending feature satisfactorily. The variation of the pairing gap parameter with spin is found to be gradual and smooth as compared to the abrupt variation evidenced in the pairing collapse treatment. Variations of the limiting moments of inertia parameter with mass number derived from our model exactly match with those coming out of the cranking model calculations for neutrons and are in no way related to the proton results; for lighter rare earth nuclei also the fluctuations in the values of the moment of inertia are found to correspond to those of the neutron single particle level spacings in this region.

• Research Organization: Department of Physics, Banaras Hindu University, Varanasi 221005, India
• OSTI ID: 6636553
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651713* -- Nuclear Properties & Reactions
A=90-149
Theoretical-- Energy Levels & Transitions-- (-1987)
651813 -- Nuclear Properties & Reactions
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Theoretical-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BACKBENDING
BINDING ENERGY
DEFORMED NUCLEI
ENERGY
ENERGY LEVELS
EVEN-EVEN NUCLEI
EXCITED STATES
INTERMEDIATE MASS NUCLEI
MOMENT OF INERTIA
NUCLEI
PAIRING ENERGY
PARTICLE PROPERTIES
RARE EARTH NUCLEI
ROTATIONAL STATES
SPIN
YRAST STATES