نتایج جستجو برای: statistical model nuclear

تعداد نتایج: 2577852  

Journal: :International Letters of Chemistry, Physics and Astronomy 2014

Journal: :Physica A: Statistical Mechanics and its Applications 2004

2008
K. A. Bugaev

For the statistical multifragmentation model the critical indices α, β, γ, δ are calculated as functions of the Fisher parameter τ . It is found that these indices have different values than in Fisher’s droplet model. Some peculiarities of the scaling relations are discussed. The basic model predicts for the index τ a narrow range of values, 1.799 < τ < 1.846, which is consistent with two exper...

2004
Ivan Franko

The basic approach in the microscopic theory of binary metal systems has been developed. The electron-ion model Hamiltonian with nonlocal manyparticle interactions was obtained using the statistical operator averaging for the electron-nuclear model over the localized electron states. The role of orthogonalization and exchange effects on the formation of electron-ion interactions is investigated...

1996
T. RAUSCHER F.-K. THIELEMANN K.-L. KRATZ

The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. In recent calculations the nuclear level density – as an important ingredient to the statistical model (Hauser-Feshbach) – has shown the highest uncertainties. We present a global parametrization of nuclear level densities based on the back-shifted Fermi-Gas formalism. Employment of an...

2007
N. Costiris E. Mavrommatis K. A. Gernoth J. W. Clark

Statistical modeling of nuclear data using artificial neural networks (ANNs) and, more recently, support vector machines (SVMs), is providing novel approaches to systematics that are complementary to phenomenological and semi-microscopic theories. We present a global model of β−-decay halflives of the class of nuclei that decay 100% by β− mode in their ground states. A fully-connected multilaye...

2010
Pin Wang Rajan K. Bista Wei Qiu Walid E. Khalbuss Lin Zhang Randall E. Brand Yang Liu

Refractive index properties, especially at the nanoscale, have shown great potential in cancer diagnosis and screening. Due to the intrinsic complexity and weak refractive index fluctuation, the reconstruction of internal structures of a biological cell has been challenging. In this paper, we propose a simple and practical approach to derive the statistical properties of internal refractive ind...

2008
M Hauer

Multiplicity distributions of hadrons produced in central nucleus-nucleus collisions are studied within the hadron-resonance gas model in the large volume limit. In the canonical ensemble conservation of three charges (baryon number, electric charge, and strangeness) is enforced. In addition, in the micro-canonical ensemble energy conservation is included. An analytical method is used to accoun...

جهانفر, سمیه, سخائی, محمود,

 A combined dynamical and statistical model for fission was employed in our calculation. There is no doubt that a Langevin description plus a Monte Carlo treatment of the evaporation processes provide the most adequate dynamical description. In this paper, we would consider a strongly shaped dependent friction force and we use the numerical method rather than the analytical one. The objective o...

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