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Journal of Nuclear Science and Technology, 2002
Recent research in the area of nuclear level densities is reviewed. The current interest in nuclear astrophysics and in structure of nuclei off of the line of stability has led to the development of radioactive beam facilities with larger machines currently being planned.
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Recent research in the area of nuclear level densities is reviewed. The current interest in nuclear astrophysics and in structure of nuclei off of the line of stability has led to the development of radioactive beam facilities with larger machines currently being planned.
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Theory of Nuclear Level Density
Physical Review, 1954We have compared the level density of a nuclear model deduced from a statistical analysis with the results of the exact counting of the levels of the same model. The tables of levels of ${\mathrm{Ne}}^{20}$ given by Critchfield and Oleksa have been used as a test of the statistical theory. A new derivation of the level density is presented.
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Physical Review, 1957
By using the statistical methods originally due to Bethe, the predictions for the densities of nuclear energy levels at excitation energies around 8 Mev are examined for two different versions of the shell model. A crude method is used to take into account the effects of shell structure. The assumed form of the theoretical expression for the density of
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By using the statistical methods originally due to Bethe, the predictions for the densities of nuclear energy levels at excitation energies around 8 Mev are examined for two different versions of the shell model. A crude method is used to take into account the effects of shell structure. The assumed form of the theoretical expression for the density of
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Nuclear Level Densities Calculations
Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 2021There is a need to determine nuclear level densities since experiments that defect nuclear level densities can not observe some of these densities, because of experimental limitations. The missed level could be calculated using standard correction of Porter-Thomas width distribution.
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The characteristic level and the nuclear level density
Nuclear Physics, 1958Abstract The suggestions put forward by Bethe and Hurwitz that level densities ought to be measured from a standard energy, such as is given by the semi-empirical formula, and not from nuclear ground states is considered. The semi-empirical formula is corrected, following P. Fong, and this “characteristic level” is determined for nuclei from A = 10
M. El-Nadi, M. Wafik
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DETERMINING NUCLEAR LEVEL DENSITIES
Capture Gamma-Ray Spectroscopy and Related Topics, 2003Nuclear level densities are important in many applications, including the study of nuclear structure far from stability and astrophysical studies of the r and p processes. Recent Shell Model Monte Carlo calculations appear promising as a method of calculating level densities and may provide improved physical understanding of the level density ...
G. E. MITCHELL +3 more
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Measurement of the Nuclear Level Density at High Spins
Physical Review Letters, 1988The neutron spectrum from the reaction /sup 92/Zr(/sup 64/Ni, 1n)/sup 155/Er has been measured at an average spin of 52h-dash-bar and for excitation energies between 30 and 36 MeV in /sup 155/Er. Channel and spin selection have been obtained from the Darmstadt-Heidelberg crystal ball.
Henss, S. +15 more
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Nuclear level-density parameter in hot nuclei
Physical Review C, 1989The influence of both quantal and thermal fluctuations on the level-density parameter {ital a} in hot nuclei is investigated. It is found that the large-amplitude motion of the nuclear surface has little influence on {ital a} and that the observed temperature and angular momentum behavior is properly explained through the thermal properties of the ...
, Ormand +3 more
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Nuclear Level Densities in the Static-Path Approximation
Physical Review Letters, 1988We propose a unified theory of nuclear level densities, encompassing both spherical and deformed nuclei, using the static-path approximation. The theory appears numerically tractable for a pairing-plus-quadrupole Hamiltonian.
, Lauritzen, , Arve, , Bertsch
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Isospin and nuclear level density
Nuclear Physics A, 1968Abstract Level densities of nuclei of A = 24 and 28 are calculated as a function of the isospin and the total angular momentum. A statistical treatment is used, and the level densities are calculated for a system of free particles and a system with the symmetry energy term taken into account.
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