Results 261 to 270 of about 14,055,750 (308)
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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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Nuclear Level Densities, 1992
Part 1 Theoretical approaches to total nuclear level densities: interacting boson model predictions of collective effects in nuclear densities, G.Maino et al role of thermal and quantal fluctuations in the nuclear level density, G.Puddu. Part 2 Theoretical approaches to partial level densities: microscopic models for exciton level densities, M.Herman &
G. Reffo, M. Herman, G. Maino
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Part 1 Theoretical approaches to total nuclear level densities: interacting boson model predictions of collective effects in nuclear densities, G.Maino et al role of thermal and quantal fluctuations in the nuclear level density, G.Puddu. Part 2 Theoretical approaches to partial level densities: microscopic models for exciton level densities, M.Herman &
G. Reffo, M. Herman, G. Maino
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Canadian Journal of Physics, 1982
Nuclear level densities are obtained by first calculating the density for non-interacting particles using the Darwin–Fowler method and then folding in approximately the effects of the residual two-body interaction. For the former, the equations resulting from the method of steepest descent are solved numerically with a realistic set of single particle
R. U. Haq, S. S. M. Wong
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Nuclear level densities are obtained by first calculating the density for non-interacting particles using the Darwin–Fowler method and then folding in approximately the effects of the residual two-body interaction. For the former, the equations resulting from the method of steepest descent are solved numerically with a realistic set of single particle
R. U. Haq, S. S. M. Wong
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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 C, 1976
An improved expression for the nuclear level density is obtained by introducing a higher term in the expansion of the excitation energy in terms of nuclear temperature. The new term leads to better fitting with the experimental results especially at the high excitation energy part of the spectrum.
M. El Nadi, A. Hashem
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An improved expression for the nuclear level density is obtained by introducing a higher term in the expansion of the excitation energy in terms of nuclear temperature. The new term leads to better fitting with the experimental results especially at the high excitation energy part of the spectrum.
M. El Nadi, A. Hashem
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LEARNING RATES FOR DENSITY LEVEL DETECTION
Analysis and Applications, 2005In this paper, we address learning rates for the density level detection (DLD) problem. We begin by proving a "No Free Lunch Theorem" showing that rates cannot be obtained in general. Then, we apply a recently established classification framework to obtain rates for DLD support vector machines under mild assumptions on the density.
Scovel, Clint +2 more
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Approximation for shell-model level densities
Physical Review C, 1988The maximum entropy approach for the calculation of nuclear shell-model level densities developed in a previous paper is extended to the calculation of terms of higher order inNk−1, whereNK is the dimension of the shell-model subspaces of interest. We present terms of first and second order inNk−1, i.e.
, Pluha, , Weidenmüller
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COMBINATORIAL MODEL OF NUCLEAR LEVEL DENSITIES [PDF]
Capture Gamma-Ray Spectroscopy and Related Topics, 2013 info:eu-repo/semantics ...
Hilaire, Stéphane +2 more
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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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1994
Abstract In the statistical model of nuclear reactions, discussed in the next chapter, the basic hypothesis is made of the formation of a fully equilibrated compound nucleus whose decay is independent of the mode of formation and entirely governed by the phase space available to the reaction products (Weisskopf and Ewing 1940).
E Gadioli, P E Hodgson
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Abstract In the statistical model of nuclear reactions, discussed in the next chapter, the basic hypothesis is made of the formation of a fully equilibrated compound nucleus whose decay is independent of the mode of formation and entirely governed by the phase space available to the reaction products (Weisskopf and Ewing 1940).
E Gadioli, P E Hodgson
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