Elastic and Inelastic Scattering of Fast Neutrons in Fusion Reactor Materials PDF Download
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Author: M. H. Jasim
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Category :
Languages : en
Pages : 0
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Author: M. H. Jasim
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Category :
Languages : en
Pages : 0
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Author: S. Bernstein
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Category : Fast neutrons
Languages : en
Pages : 4
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Author: A. B. Smith
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Category : Fast neutrons
Languages : en
Pages : 38
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Author: Westinghouse Research Laboratories. Nuclear Physics Section
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ISBN:
Category : Fast neutrons
Languages : en
Pages : 166
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Author: Byron L. Youtz
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Category : Collisions (Nuclear physics)
Languages : en
Pages : 68
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Author: T. A. Goloborod'ko
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Category : Neutrons
Languages : en
Pages : 18
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Author: Michael Jay Lineberry
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Category : Electronic dissertations
Languages : en
Pages : 244
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Book Description
The emphasis in reactor physics research has shifted toward investigations of fast reactors. The effects of high energy neutron processes have thus become fundamental to our understanding, and one of the most important of these processes is nuclear inelastic scattering. In this research we include inelastic scattering as a primary energy transfer mechanism, and study the resultant neutron energy spectrum in an infinite medium. We assume that the moderator material has a high mass number, so that in a laboratory coordinate system the energy loss of an inelastically scattered neutron may be taken as discrete. It is then consistent to treat elastic scattering with an age theory expansion. Mathematically these assumptions lead to balance equations of the differential-difference type. The steady state problem is explored first by way of Laplace transformation of the energy variable. We then develop another steady state technique, valid for multiple inelastic level excitations, which depends on the level structure satisfying a physically reasonable constraint. In all cases the solutions we generate are compared with results obtained by modeling inelastic scattering with a separable, evaporative kernel. The time dependent problem presents some new difficulties. By modeling the elastic scattering cross section in a particular way, we generate solutions to this more interesting problem. We conjecture the method of characteristics may be useful in analyzing time dependent problems with general cross sections. These ideas are briefly explored.
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Category : Angular distribution (Nuclear physics)
Languages : en
Pages : 58
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The scattering of neutrons with energies of less than or approximately 1.5 MeV from tantalum, rhenium, and platinum was studied experimentally. Elastic and inelastic neutron-scattering angular distributions were determined at incident neutron-energy intervals of less than or approximately 20 keV throughout th range 0.3 to 1.5 MeV. Time-of-flight measurements were made concurrently at eight or more scattering angles between 25 and 155 degrees with sufficient scattered neutron-energy resolution to separate the elastic scattered component from most inelastic scattered neutron groups. Differential inelastic scattering cross sections were observed corresponding to the excitation of various states. The experimental results were compared with calculations based upon the optical model and the Hauser-Feshbach formula inclusive of corrections for resonance-width fluctuations. The experimentally observed level structure is discussed in the context of single-particle and rotational states of deformed nuclei.
Author: A. B. Smith
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ISBN:
Category : Angular distribution (Nuclear physics)
Languages : en
Pages : 38
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The spectrum of neutrons scattered from tantalum-181 was measured at incident neutron energies ranging from 0.3 to 1.5 Mev. Time-of-flight techniques were employed to resolve the elastically and the inelastically scattered components. The magnitudes of the differential elastic cross sections and of the inelastic excitation functions were determined relative to the known elastic scattering cross section of carbon. The experimental results were compared with those obtained in previous measurements and a qualitative comparison was made with theoretical calculations.
Author: Kenneth I. Greisen
Publisher:
ISBN:
Category : Inelastic scattering
Languages : en
Pages : 16
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