Pre-equilibrium Particle Decay in the Photonuclear Reactions
Author : J. R. Wu
Publisher :
Page : 76 pages
File Size : 29,77 MB
Release : 1976
Category :
ISBN :
Author : J. R. Wu
Publisher :
Page : 76 pages
File Size : 29,77 MB
Release : 1976
Category :
ISBN :
Author :
Publisher :
Page : pages
File Size : 17,44 MB
Release : 1976
Category :
ISBN :
Calculations of particle energy spectra resulting from the photonuclear reactions at energies below the meson production threshold have been carried out in the framework of combining the pre-equilibrium exiton model and the quasi-deuteron model. A 2p-2h initial state in the exciton model is assumed because in the energy region above giant resonance the quasi-deuteron absorption is the dominant process. With these combined models, the subsequent secondary interactions of the emerging particle with the rest of the nucleus following the initial photon-nucleus interaction are appropriately taken into account. The experimental difference energy spectra of fast photoneutrons from several elements (Al, Cu, In, Sn, Ta, Pb, Bi and U) at bremsstrahlung energies of 55 and 85 MeV and the photoproton energy spectra from 12C at bremsstrahlung energy 110 MeV were compared with the theoretical predictions. General agreements in both spectral shapes and cross sections are obtained. The relative yields of the reactions (.gamma., xn) resulting from monoenergetic photons on 127I at 50, 100 and 150 MeV are also predicted reasonably well by the combined models together with the conventional evaporation theory.
Author : S. Bayegan
Publisher :
Page : pages
File Size : 16,96 MB
Release : 1983
Category :
ISBN :
Author : United States. Energy Research and Development Administration
Publisher :
Page : 1104 pages
File Size : 27,99 MB
Release : 1977
Category : Medicine
ISBN :
Author :
Publisher :
Page : pages
File Size : 36,20 MB
Release : 1986
Category :
ISBN :
The Boltzmann master equation (BME) is defined for application to precompound decay in heavy ion reactions in the 10 100 MeV/nucleon regime. Predicted neutron spectra are compared with measured results for central collisions of 2°Ne and 12C with 165Ho target nuclei. Comparisons are made with subthreshold .pi.° yields in heavy ion reactions between 35 and 84 MeV/nucleon, and with the .pi.° spectra. The BME is found to be an excellent tool for investigating these experimentally observed aspects of non-equilibrium heavy ion reactions. 18 refs., 8 figs.
Author :
Publisher :
Page : 548 pages
File Size : 39,55 MB
Release : 1978
Category : Power resources
ISBN :
Author :
Publisher :
Page : 612 pages
File Size : 45,90 MB
Release : 1976
Category : Nuclear energy
ISBN :
Author :
Publisher :
Page : 804 pages
File Size : 31,79 MB
Release : 1978
Category : Power resources
ISBN :
Author :
Publisher :
Page : 1126 pages
File Size : 33,98 MB
Release : 1985
Category : Nuclear physics
ISBN :
Author : United States. Energy Research and Development Administration. Technical Information Center
Publisher :
Page : 1682 pages
File Size : 37,51 MB
Release : 1977
Category : Force and energy
ISBN :