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Author: Montecue J. Lowry Publisher: ISBN: Category : Nuclear physics Languages : en Pages : 162
Book Description
The statistical model assumes a statistical distribution of nuclear density levels in the decay of the compound nucleus. The densities of nuclear levels can be described by a standard formula in a region containing many energy levels. This formula can be used to predict the cross-sections for photonuclear reactions within the energy range 0 to 30 MEV. Provided assumptions are made neglecting the coulomb effect, spin, parity, angular momentum, and tertiary and higher order reactions, these predictions can be made by a digital computer and the results plotted on a graph with experimental data for comparison. The digital computer program is used to find the statistical level density formula that most closely approximates the cross-sections obtained experimentally. (Author).
Author: Montecue J. Lowry Publisher: ISBN: Category : Nuclear physics Languages : en Pages : 162
Book Description
The statistical model assumes a statistical distribution of nuclear density levels in the decay of the compound nucleus. The densities of nuclear levels can be described by a standard formula in a region containing many energy levels. This formula can be used to predict the cross-sections for photonuclear reactions within the energy range 0 to 30 MEV. Provided assumptions are made neglecting the coulomb effect, spin, parity, angular momentum, and tertiary and higher order reactions, these predictions can be made by a digital computer and the results plotted on a graph with experimental data for comparison. The digital computer program is used to find the statistical level density formula that most closely approximates the cross-sections obtained experimentally. (Author).
Author: A.J Cole Publisher: CRC Press ISBN: 1420033476 Category : Science Languages : en Pages : 354
Book Description
Statistical Models for Nuclear Decay: From Evaporation to Vaporization describes statistical models that are applied to the decay of atomic nuclei, emphasizing highly excited nuclei usually produced using heavy ion collisions. The first two chapters present essential introductions to statistical mechanics and nuclear physics, followed by a descript
Author: International Atomic Energy Agency Publisher: IAEA ISBN: Category : Business & Economics Languages : en Pages : 184
Book Description
The practical use of such nuclear model codes requires a considerable numerical input that describes the properties of the nuclei and the interactions involved. Experts have used a variety of different methods and input data sets, often developed over many years in their own laboratories. Many of these input databases are poorly or not at all documented, and are not always available for other users. With the trend towards reduced funding for nuclear data evaluations, there is a real threat that the immense amount of accumulated knowledge of nuclear data input parameters and associated calculations may be compromised or even lost for future applications. Therefore, the IAEA has undertaken an extensive coordinated effort to develop a library of evaluated and tested nuclear-model input parameters: RIPL-2.--Publisher's description.
Author: Publisher: ISBN: Category : Languages : en Pages : 19
Book Description
The authors have developed the GNASH code to include photonuclear reactions for incident energies up to 140 MeV. Photoabsorption is modeled through the giant resonance at the lower energies, and the quasideuteron mechanism at the higher energies, and the angular momentum coupling of the incident photon to the target is properly accounted for. After the initial interaction, primary and multiple preequilibrium emission of fast particles can occur before compound nucleus decay from the equilibrated compound nucleus. The angular distributions from compound nucleus decay are taken as isotropic, and those from preequilibrium emission (which they obtain from a phase-space model which conserves momentum) are forward-peaked. To test the new modeling they apply the code to calculate photonuclear reactions on 2°8Pb for incident energies up to 140 MeV.
Author: Ahmed A. Selman Publisher: LAP Lambert Academic Publishing ISBN: 9783659135941 Category : Languages : en Pages : 180
Book Description
This book reviews statistical exciton model of nuclear reactions, and how it is used to calculate Preequilibrium Emission (PE) spectra and reaction cross-sections at energies about 80 MeV. Numerical calculations are made for a two-component system, for (N, N) reactions with Fe-54, Fe-56, Rh-103, and Bi-209 nuclei. Two contributions to the existing model are made: The development of a complete and analytical solution to calculate the state density of excited states based on the one-component non-Equidistant Spacing Model (non-ESM). Also, a simple numerical approach to solve the master equation at energies less than 80 MeV is presented. A variety of quantities required during PE calculation, such as the state density of the excited states, the effective matrix element of the specified reaction, the occupation probability of exciton states, and others are discussed and numerically calculated using a library of MATLAB codes written for this purpose. PE spectra for selected reactions are numerically calculated and compared with earlier calculations.
Author: Montecue J. Lowry
Author: Montecue J. Lowry
Author: A.J Cole
Author: Bernard Leonard Cohen
Author: Witold Grochulski
Author: International Atomic Energy Agency
Author: Sergio Costa
Author: 
Author: Ahmed A. Selman
Author: R. G. Alsmiller
Author: