Non-local Optical Model for Nucleon-nucleus Interactions
Author : Shaikh Suhrabuddin
Publisher :
Page : 135 pages
File Size : 33,27 MB
Release : 1968
Category :
ISBN :
Author : Shaikh Suhrabuddin
Publisher :
Page : 135 pages
File Size : 33,27 MB
Release : 1968
Category :
ISBN :
Author : Peter Edward Hodgson
Publisher : World Scientific
Page : 440 pages
File Size : 39,10 MB
Release : 1994
Category : Science
ISBN : 9789810217228
The nucleon optical model is widely used to calculate the elastic scattering cross-sections and polarisations for the interaction of neutrons and protons with atomic nuclei. The optical model potentials not only describe the scattering but also provide the wave functions needed to analyse a wide range of nuclear reactions. They also unify many aspects of nuclear reactions and nuclear structure. This book consists of a comprehensive introduction to the subject and a selection of papers by the author describing the optical model in detail. It contains full references to the original literature with many examples of the application of the model to the analysis of experimental data.
Author :
Publisher :
Page : 30 pages
File Size : 12,30 MB
Release : 1967
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Author :
Publisher :
Page : 1288 pages
File Size : 10,64 MB
Release : 1976
Category : Nuclear energy
ISBN :
Author : Peter Edward Hodgson
Publisher :
Page : 32 pages
File Size : 30,91 MB
Release : 1967
Category : Nuclear optical models
ISBN :
Author :
Publisher :
Page : 1068 pages
File Size : 36,57 MB
Release : 1972-04
Category : Nuclear energy
ISBN :
Author : MohammadHossein Mahzoon
Publisher :
Page : 0 pages
File Size : 45,67 MB
Release : 2015
Category :
ISBN :
A fully nonlocal treatment for the dispersive optical model (DOM) is implemented for both the real and imaginary part of the self-energy inspired by ab initio theoretical calculations of this quantity. By means of the dispersion relation between the real and imaginary part of the optical potential a link between the energy domain of nuclear reactions and nuclear structure is established. The relevant scattering data for neutrons and protons on 40Ca are described with the same quality as was accomplished with previous local versions of the DOM. The solution of the Dyson equation at positive and negative energies is generated with a complete treatment of the nonlocality of the potentials. The resulting propagator has been utilized to explain and predict relevant quantities of the ground-state of the 40Ca nucleus. In particular the charge density, spectral strength and particle number can, for the first time, be accurately described. Moreover, due to the introduction of nonlocality in the imaginary part of the self-energy it is also possible to describe high-momentum protons and the contribution of the two-body interaction to the ground-state energy. The calculation of the spectral density at positive energies allows for the determination of the spectral strength of mostly occupied single-particle orbits in the continuum. Consistency of the resulting depletion numbers with the corresponding occupation numbers is studied and compared to ab initio calculations for these quantities. Starting from the 40Ca self-energy, an extension to the 48Ca nucleus is implemented focusing on the N-Z dependence of the nucleon self-energy. Neutron scattering data can be described with even better quality than previous local DOM calculations. The scattering properties for protons are of similar excellent quality as for previous local results. From the solution of the Dyson equation for neutrons it is possible to calculate the neutron distribution of this nucleus allowing for the determination of the neutron skin which is relevant for the physics of neutron stars. The resulting value is larger than most calculations previously reported including an ab initio one. An argument supporting a large neutron skin is provided by analyzing proton elastic scattering data on both 40Ca and 48Ca.
Author : S. Boffi
Publisher : Springer
Page : 236 pages
File Size : 13,21 MB
Release : 1976-11-20
Category : Science
ISBN :
Author : George E. Walker
Publisher : Springer
Page : 528 pages
File Size : 42,32 MB
Release : 1986
Category : Science
ISBN :
Author : J.W. Negele
Publisher : Springer Science & Business Media
Page : 557 pages
File Size : 48,37 MB
Release : 2005-12-17
Category : Science
ISBN : 0306471019
For the first half of the 20th Century, low-energy nuclear physics was one of the dominant foci of all of science. Then accelerators prospered and energies rose, leading to an increase of interest in the GeV regime and beyond. The three articles comprising this end-of-century Advances in Nuclear Physics present a fitting and masterful summary of the energy regimes through which nuclear physics has developed and promises to develop in future. One article describes new information about fundamental symmetries found with kV neutrons. Another reviews our progress in understanding nucleon-nucleus scattering up to 1 GeV. The third analyzes dilepton production as a probe for quark-gluon plasmas generated in relativistic heavy-ion collisions.