Nuclear Level Density and Thermodynamic Functions for Nuclei with Static Deformation

Behkami, A.N.; Nasrabadi, M.N.

doi:10.1088/0253-6102/37/4/457

Cited by 9 publications

(15 citation statements)

References 6 publications

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“…[6,7], briefly described in Appendix B, is valid only in the last case and, in fact, it has already been applied to heavier deformed lanthanides measured by the Oslo group, such as 161,162 Dy, 166 Er, and 171,172 Yb [35,36].…”

Section: Numerical Resultsmentioning

confidence: 99%

Level densities of transitional Sm nuclei

et al. 2005

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Experimentally determined level densities of the transitional isotopes 148,149,150,152 Sm at excitation energies below and around the neutron binding energy are compared with microcanonical calculations based on a Monte Carlo approach to noncollective level densities, folded with a collective enhancement estimated in the frame of the interacting boson model (IBM). The IBM parameters are adjusted so as to reproduce the low-lying discrete levels of both parities, with the exception of the odd-mass nucleus, 149 Sm, where complete decoupling of the unpaired neutron from the core is assumed.

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Section: Numerical Resultsmentioning

confidence: 99%

Level densities of transitional Sm nuclei

et al. 2005

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“…Therefore, the problem is reduced to the BCS quasi-particle as non-interacting fermions. For this, the second quantization formalism is applied [7][8][9][10]. There are many parameters in the Hamiltonian that describe a system of interacting fermions [11].…”

Section: Microscopic Theory Of Interacting Fermionsmentioning

confidence: 99%

“…N is the entropy of the system and det D is a 3 × 3 determinant of second order partial differentials of partition function ln Z(β 0 , α 0 ) versus β and α i in the saddle point. In microscopic formalism, grand partition function is determined by realistic single particle levels [7][8][9][10]12] ln…”

Section: Microscopic Theory Of Interacting Fermionsmentioning

confidence: 99%

“…If E rot (K, I) is negligible compared to total excitation energy, the above equation can be shown as [7,9] ρ…”

Section: Microscopic Theory Of Interacting Fermionsmentioning

confidence: 99%

“…σ 2 designates the parallel spin cut-off parameter, obtained from the projection of the angular momentum of the single-particle states on the symmetry axis. It can be calculated by using microscopic theory and a realistic scheme of single particle levels as [7,9]…”

Section: Microscopic Theory Of Interacting Fermionsmentioning

confidence: 99%

See 2 more Smart Citations

Study of Collective Rotational Enhancement Factors for Nuclear Level Densities Using the Microscopic Theory of Interacting Fermions

Nasrabadi¹,

Sepiani²

2014

Acta Phys. Pol. B

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Determination of accurate nuclear level densities is of crucial importance for a variety of nuclear physics aspects and its related technologies. Therefore, there have been many theoretical and experimental efforts to determine nuclear level densities for variety of nuclei. In this research, the effects of changing structure and collective excitations on some deformed nuclei with axial symmetry were studied using microscopic generalized superfluid model (MGSFM) and experimental data. It was shown that the experimental data can be reproduced by a level density formalism developed for nuclei with static deformation.

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Generalization of phenomenological models of nuclear level density to high energies

Nasrabadi¹,

Sepiani²

2015

Phys. Scr.

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Phenomenological models that calculate the nuclear level densities (NLDs) based on the famous Fermi gas model are the most widely used models for practical applications, especially in nuclear reaction and evaporation codes. However, results of the most recent microscopic methods for calculation of NLDs indicate that the high-energy behavior of NLDs beyond approximately 30-50 MeV cannot be well described by these phenomenological models. In this research, using the results of microscopic spectral distribution method at high energies, a new relation for energy dependent NLD parameter is presented and using this new relation, these high-energy microscopic results and low energy experimental data can be well reproduced by Fermi gas phenomenological models.

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Nuclear Level Density and Thermodynamic Functions for Nuclei with Static Deformation

Cited by 9 publications

References 6 publications

Level densities of transitional Sm nuclei

Level densities of transitional Sm nuclei

Study of Collective Rotational Enhancement Factors for Nuclear Level Densities Using the Microscopic Theory of Interacting Fermions

Generalization of phenomenological models of nuclear level density to high energies

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