Journal ArticleDOI
Chemical binding effects on resonance line shape and neutron capture rates
Holger St John,R.A. Karam +1 more
TLDR
In this paper, both harmonic and damped vibrational models of chemical binding in the resonance treatment of uranium compounds were considered, and it was found that the line shape obtained with the harmonic approximation relative to the free-gas, Maxwell model, is shorter at the peak and broader in the wings.About:
This article is published in Annals of Nuclear Energy.The article was published on 1981-01-01. It has received 5 citations till now. The article focuses on the topics: Chemical binding & Resonance.read more
Citations
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Journal ArticleDOI
Physics of nuclear reactor safety
TL;DR: In this paper, a review of the physical aspects of safety of nuclear fission reactors is presented, focusing on the main risk sources and the main principles for a safe design, and the physical processes that are fundamental for the properties of fission chain reacting processes and the control of those processes.
Journal ArticleDOI
Anharmonic effects on the resonance line shape of 238U in UO2—III
R.L. d'Avila,R.A. Karam +1 more
TL;DR: In this article, the authors presented a numerical method for the evaluation of the resonance line shape of 238 U in UO 2 and showed that it is possible to express the line shape as a sum of a convergent series with a very fast rate of convergence.
Journal ArticleDOI
Chemical binding effects on resonant scattering of neutrons
A. I. Shamaoun,G.C. Summerfield +1 more
TL;DR: In this article, the effect of chemical binding on resonance broadening was investigated for a harmonic crystal model to examine the chemical binding effect for resonant scattering, and it was shown that at high temperatures or high resonance energies, scattering can be treated using ideal gas with the same effective temperature as for absorption accounting for chemical binding effects.
Journal ArticleDOI
Anharmonic effects on the resonance line shape of 238U in UO2—III: Cubic, quartic and thermal effects of the phonon shifts and widths on the resonance line shape
R.L. d'Avila,R.A. Karam +1 more
TL;DR: In this paper, the authors present the results obtained by applying six different models to the formalism of the line shapes of 238U in UO2 developed in the first two papers of this series.
Journal ArticleDOI
Experimental evidence sustaining a compact-extended model for doppler broadening of neutron absorption resonances
TL;DR: In this paper, the authors presented a new model to handle solid state effects on Doppler broadening of neutron absorption resonances (DBNAR) in a simplified manner, which is based on the commonly used effective temperature gas model (ETGM).
References
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Book
Introduction to solid state physics
TL;DR: In this paper, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.