Effective Nucleon Mass in Deformed Nuclei
- 8 May 2000
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 84 (19) , 4317-4320
- https://doi.org/10.1103/physrevlett.84.4317
Abstract
The coupling of vibrations to nucleons moving in levels lying close to the Fermi energy of deformed rotating nuclei is found to lead to a number of effects: (i) shifts of the single-particle levels of the order of 0.5 MeV towards the Fermi energy and thus to an increase of the level density, (ii) single-particle state depopulation of the order of 30%, and thus spectroscopic factors approximately 0.7, etc. These effects, which we have calculated for 168Yb, can be expressed in terms of an effective mass, the so-called omega mass ( m(omega)), which is approximately 40% larger than the bare nucleon mass in the ground state. It is found that m(omega) displays a strong dependence with rotational frequency, eventually approaching the bare mass for Planck's over 2piomega(rot) approximately 0.5-0.6 MeV.Keywords
This publication has 18 references indexed in Scilit:
- Temperature dependence of the nucleon effective mass and the physics of stellar collapsePhysical Review Letters, 1994
- Effective mass and level-density parameter in nuclei at finite temperaturePhysics Letters B, 1987
- Dynamics of the shell modelPhysics Reports, 1985
- Microscopic calculation of dynamical effects: The energy dependence of nucleon self-energies in 208PbNuclear Physics A, 1983
- An Extension of the Rotating Shell Model and Its Application to 164ErProgress of Theoretical Physics, 1983
- Two-instanton contribution to the topological susceptibility in CPn−1-models on a spherePhysics Letters B, 1983
- Dynamical Content of the Shell ModelPhysica Scripta, 1983
- Dynamics of single-particle and collective excitations in heavy nucleiNuclear Physics A, 1982
- Effects of collective modes on the single-particle states and the effective mass in 208PbNuclear Physics A, 1980
- Microscopic optical potential for 208Pb in the nuclear structure approachNuclear Physics A, 1979