Results 161 to 170 of about 536,195 (200)

SYSTEMATICS OF NUCLEAR LEVEL DENSITY PARAMETERS

Capture Gamma-Ray Spectroscopy and Related Topics, 2003
The level density parameters for backshifted Fermi gas (both without and with energy-dependent level density parameter) and constant-temperature models have been determined for 310 nuclei between $^{18}\mathrm{F}$ and $^{251}\mathrm{Cf}$ by fitting of the complete level schemes at low excitation energies and s-wave neutron resonance spacings at the ...
Till von Egidy, Dorel Bucurescu
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Nuclear Level Densities

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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Nuclear Level Densities Calculations

Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 2021
There 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, 1958
Abstract 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, 2003
Nuclear 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, U. AGVAANLUVSAN, J. F. SHRINER, M. P. PATO   +3 more
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Measurement of the Nuclear Level Density at High Spins

Physical Review Letters, 1988
The 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., Ruckelshausen, A., Fischer, R.D., Kuhn, W., Metag, V., Novotny, R., Janssens, R.V.F., Khoo, T.L., Habs, D., Schwalm, D., Freeman, D., Duchene, G., Haas, B., Haas, F., Hlavac, S., Simon, R.S.   +15 more
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Nuclear level-density parameter in hot nuclei

Physical Review C, 1989
The 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, , Bortignon, , Bracco, , Broglia   +3 more
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Nuclear Level Densities in the Static-Path Approximation

Physical Review Letters, 1988
We 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, 1968
Abstract 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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Statistical Emission in Nuclear Reactions and nuclear level density

Il Nuovo Cimento, 1961
The statistical model in nuclear reactions has been developed extensively in the past decades, mainly by V. Weisskopf. However a clear understanding of the experimental situation regarding low and medium energy nuclear reaction is not yet settled. The interpretation is complicated by the fact that often the reactions proceed via other mechanisms, for ...
E. Erba, U. Facchini, E. Saetta Menichella   +2 more
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