Results 271 to 280 of about 14,055,750 (308)
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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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Density of Levels in a Generalized Matrix Ensemble
Physical Review Letters, 1995We present analytical results for the average density of levels $\ensuremath{\rho}(\ensuremath{\lambda})$ in an ensemble of random matrices, which is a generalization of the standard Gaussian unitary ensemble. The generalized ensemble contains a parameter $\ensuremath{\mu}(N)$ which is allowed to scale, in an arbitrary way, with the matrix size $N ...
, Kreynin, , Shapiro
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Nuclear shell model and level density
International Journal of Modern Physics E, 2020The accurate knowledge of the nuclear level density is crucial for understanding the nuclear structure and for numerous applications including astrophysical reactions. In this review paper, we discuss the shell-model description of the nuclear level density, the use of the statistical moments method and underlying physics. The level density found with
Vladimir Zelevinsky, Sofia Karampagia
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Nuclear level densities at high excitations
Physical Review C, 1992We calculate level densities for {sup 20}Ne, {sup 40}Ca, and {sup 100}Ru nuclei using unrestricted uniform, single particle levels (Fermi gas) and for realistic levels restricted to those bound by centripetal and Coulomb forces. For the latter we use single particle levels due to Seeger, and results for a Woods-Saxon model.
, Mustafa, , Blann, , Ignatyuk, , Grimes
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Lipid levels and bone mineral density
The American Journal of Medicine, 2005There has been considerable debate about the potential relationship between the use of statin lipid-lowering drugs and fracture risk; several observational studies suggest a protective effect but no randomized controlled trials have confirmed such a benefit.
Daniel H, Solomon +3 more
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SYSTEMATICS OF NUCLEAR LEVEL DENSITY PARAMETERS
Capture Gamma-Ray Spectroscopy and Related Topics, 2003The 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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IMPROVED MICROSCOPIC NUCLEAR LEVEL DENSITIES
Capture Gamma-Ray Spectroscopy and Related Topics, 2003info:eu-repo/semantics ...
Demetriou, Paraskevi, Goriely, Stéphane
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Temperature dependence of the level density parameter
Physical Review C, 1995Even though the local density approximation leads to an overestimation of the absolute value of the nuclear level density parameter, we show that this simplifying approximation accurately describes the temperature dependence of Thomas-Fermi calculations of the nuclear level density parameter performed by Shlomo and Natowitz.
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NUCLEAR LEVEL DENSITY AT FINITE TEMPERATURES
International Journal of Modern Physics E, 2006Selfconsistent mean-field calculations have been performed with the SkM* Skyrme force for 140 spherical even-even nuclei at temperatures 0≤T≤4 MeV . Single-particle level densities for this sample of nuclei are determined for various temperatures. The average dependence of the single-particle level density on mass number A and isospin is given and ...
Johann Bartel +2 more
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Test of level densities with proton resonances
Physical Review C, 1991Differential cross sections for the {sup 48}Ti({ital p},{ital p}{sub 0}) and ({ital p},{ital p}{sub 1}) reactions were measured in the range {ital E}{sub {ital p}}=3.08--3.86 MeV with an overall resolution of about 350 eV. Resonance parameters were extracted for 716 levels with a multilevel, multichannel {ital R}-matrix code.
, Li +4 more
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