نتایج جستجو برای: neutron transport theory

تعداد نتایج: 1082905  

Journal: :Physical review letters 1996
Varma

The anomalous part of the NMR relaxation rate of copper nuclei in the normal state of copperoxide metals is calculated using the orbital magnetic parts of the fluctuations derived in a recent theory to explain the long wavelength transport anomalies. Oxygen and Yttrium reside on lattice sites at which the anomalous contribution is absent at all hole densities. The frequency, momentum dependence...

2008
D. A. BAIKO P. Haensel

(Received February 1, 2008) As pointed out by Kutschera and Wójcik, very low concentration of protons combined with a specific density dependence of effective neutron– proton interaction could lead to a localization of “proton impurities” in neutron medium at densities exceeding four times normal nuclear matter density. We study consequences of the localization of protons for transport processe...

2004
J. C. Liu W. R. Nelson

CALCULATIONS OF THE GIANT-DIPOLE-RESONANCE PHOTONEUTRONS USING A COUPLED EGS4-MORSE CODE J. C. Liu, W. R. Nelson, K. R. Kase and X. S. Mao Stanford Linear Accelerator Center, P. 0. Box 4349, Stanford, CA 94309 Abstract The production and transport of the photoneutrons from the giant-dipoleresonance reaction have been implemented in a coupled EGS4-MORSE code. The total neutron yield (including b...

2008
Boulbeba Abdelmoumen Abdelkader Dehici Aref Jeribi Maher Mnif Nikolaos S. Papageorgiou

The theory of measures of noncompactness has many applications on topology, functional analysis, and operator theory. In this paper, we consider one axiomatic approach to this notion which includes the most important classical definitions. We give some results concerning a certain class of semi-Fredholm and Fredholm operators via the concept of measures of noncompactness. Moreover, we establish...

Journal: :Journal of Physics G: Nuclear and Particle Physics 2009

Journal: :The journal of physical chemistry. B 2008
Evangelia Pantatosaki George K Papadopoulos Hervé Jobic Doros N Theodorou

A direct comparison of quasielastic neutron scattering experimental measurements and molecular dynamics computer simulations is carried out for the first time for hydrogen and deuterium confined in the nanostructure of faujasite type zeolites at a temperature of 100 K, in order to investigate the dependence of sorption thermodynamics and sorbate dynamics on the sorbed phase concentration. The c...

2010
Kislay Bhatt Vibhuti Duggal Rajesh Kalmady Anurag Gupta

A Neutron Transport Code ATES3 (Anisotropic Transport Equation Solver in 3D), which was developed at BARC for the deterministic solution of 3D steady-state neutron transport problems, has been parallelized using Message Passing Parallel Programming model on BARC’s ANUPAM Parallel Supercomputer. The most time consuming step in the code ATES3, which is transport sweep, was made parallel using thr...

2014
Dirk J. Pons Arion D. Pons Aiden J. Pons

Purpose – The decay of the neutron is well known from the perspective of empirical quantification, but the ontological explanations are lacking for why the neutron should be stable within the nucleus and unstable outside. A theory is developed to explain the reasons for decay of the free neutron and stability of the bonded neutron. Method – The Cordus theory, a type of non-local hidden-variable...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1961
L J COLE W E DAVIS

This is obtained by equating the elements in the first column and first row of the l-matrix with the corresponding element in its product representation obtained by combining any two commensurate 11Z-matrices according to the group property. 6. Ontogenetics. At first appearance, the generalized invariant imbedding relation may seem to have no foundation in the established principles of radiativ...

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