Fermi-Gas Model Parametrization of Nuclear Level Density.
نویسندگان
چکیده
منابع مشابه
Nuclear response beyond the Fermi gas model
The Fermi gas model, while providing a reasonable qualitative description of the continuum nuclear response, does not include the effects of dynamical nucleon-nucleon correlations in the initial and final states, that have long been recognized to play a critical role in specific kinematical regions. We review a many-body approach in which these effects are consistently taken into account and di...
متن کاملLevel density of a Fermi gas: average growth and fluctuations.
We compute the level density of a two-component Fermi gas as a function of the number of particles, angular momentum, and excitation energy. The result includes smooth low-energy corrections to the leading Bethe term (connected to a generalization of the partition problem and Hardy-Ramanujan formula) plus oscillatory corrections that describe shell effects. When applied to nuclear level densiti...
متن کاملFluctuations in the level density of a fermi gas.
We present a theory that accurately describes the counting of excited states of a noninteracting fermionic gas. At high excitation energies the results reproduce Bethe's theory. At low energies oscillatory corrections to the many-body density of states, related to shell effects, are obtained. The fluctuations depend nontrivially on energy and particle number. Universality and connections with P...
متن کاملA self-confined Fermi-gas model for nuclear collective motion
The well-known phenomenological dynamic equation for the nuclear shape parameter was derived from first principles with the aim of obtaining the microscopic or many-body expressions for inertia B, deformation force f , and friction coefficient γ of collective motion in hot nuclei. Nuclear evolution, viewed as a sequence of quasiequilibrium stages, is described with the aid of the density matrix...
متن کاملSTUDY OF NUCLEAR LEVEL DENSITY AND SPIN CUT-OFF FACTORS
Nuclear level densities and spin cut-off factors have been deduced for nuclei in the mass region 24‹A‹63,from a microscopic theory, which includes nuclear pairing interaction. Single particle levels for both Seeger and Nilsson potentials were used in the calcdations. Level densities extracted from the theory are compared with their conesponding experimental values, It is found that the overall...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Nuclear Science and Technology
سال: 1994
ISSN: 1881-1248,0022-3131
DOI: 10.3327/jnst.31.151