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The Application Of Pulsed Neutron Methods To The Investigation Of Neutron Slowing Down And Thermalization
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Book Synopsis The Application of Pulsed Neutron Methods to the Investigation of Neutron Slowing Down and Thermalization by : Achilles Grammenov Adamantiades
Download or read book The Application of Pulsed Neutron Methods to the Investigation of Neutron Slowing Down and Thermalization written by Achilles Grammenov Adamantiades and published by . This book was released on 1966 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Slowing Down and Thermalization of Neutrons by : Michael Maurice Rudolph Williams
Download or read book The Slowing Down and Thermalization of Neutrons written by Michael Maurice Rudolph Williams and published by . This book was released on 1966 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Slow Neutron Scattering and Thermalization, with Reactor Applications by : Donald E. Parks
Download or read book Slow Neutron Scattering and Thermalization, with Reactor Applications written by Donald E. Parks and published by Addison Wesley Longman. This book was released on 1970 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An experimental study of the time dependence of neutron moderat... by : Eskil Moller
Download or read book An experimental study of the time dependence of neutron moderat... written by Eskil Moller and published by . This book was released on 1966 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pulsed Neutron Research written by and published by . This book was released on 1965 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Slowing Down and Thermalization of Neutrons in Pulsed Media by : Michael Maurice Rudolph Williams
Download or read book The Slowing Down and Thermalization of Neutrons in Pulsed Media written by Michael Maurice Rudolph Williams and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pulsed Neutron Techniques by : George Robert Keepin
Download or read book Pulsed Neutron Techniques written by George Robert Keepin and published by . This book was released on 1958 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Application of Pulsed Neutron Techniques to the Measurement of Neutron Slowing Down Time in Water by : James Edward Vaughan
Download or read book The Application of Pulsed Neutron Techniques to the Measurement of Neutron Slowing Down Time in Water written by James Edward Vaughan and published by . This book was released on 1967 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Neutron Thermalization Conference, April 28-30, 1958 Gatlinburg, Tennessee by : Oak Ridge National Laboratory
Download or read book Proceedings of the Neutron Thermalization Conference, April 28-30, 1958 Gatlinburg, Tennessee written by Oak Ridge National Laboratory and published by . This book was released on 1959 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review of the Methods for Computing Thermal Neutron Spectra by : Henry C. Honeck
Download or read book A Review of the Methods for Computing Thermal Neutron Spectra written by Henry C. Honeck and published by . This book was released on 1963 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Pulsed Neutron Source Technique by : R. Siems
Download or read book A Pulsed Neutron Source Technique written by R. Siems and published by . This book was released on 1960 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: For a measurement of the diffusion constant D from the decay of the fundamental mode only, optimal dimensions of the pile are given, leading to a fast decay of the higher modes. Another method is discussed which makes use also of higher modes. Evaluation formulas and optimal pile dimensions for this method are derived. The amplitudes of the normal modes are calculated for different initial distributions of the neutrons by means of the Fermi age theory. The error introduced using Fermi age theory was fixed moderator atoms for the slowing down process down to thermal energy is estimated. In one instance, for a simple initial distribution of thermal neutrons, the neutron density was calculated as a function of space and time. The data obtained were used to check the accuracy of some approximate evaluation formulas derived here.
Book Synopsis Proceedings of the Brookhaven Conference on Neutron Thermalization: Experimental aspects of transient and asymptotic phenomena by : Brookhaven National Laboratory
Download or read book Proceedings of the Brookhaven Conference on Neutron Thermalization: Experimental aspects of transient and asymptotic phenomena written by Brookhaven National Laboratory and published by . This book was released on 1962 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Brookhaven Conference on Neutron Thermalization, April 30-May 2, 1962: Neutron spectra in lattices and infinite media by : Brookhaven National Laboratory
Download or read book Proceedings of the Brookhaven Conference on Neutron Thermalization, April 30-May 2, 1962: Neutron spectra in lattices and infinite media written by Brookhaven National Laboratory and published by . This book was released on 1962 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Neutron Thermalisation by : Peter A. Egelstaff
Download or read book Experimental Neutron Thermalisation written by Peter A. Egelstaff and published by Pergamon. This book was released on 1969 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Pulsed Neutron Application to Power Reactor Start-Up Procedures. First Quarterly Progress Report, April 1-June 30, 1962 by :
Download or read book Development of Pulsed Neutron Application to Power Reactor Start-Up Procedures. First Quarterly Progress Report, April 1-June 30, 1962 written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Activities in a program to develop techniques in the use of pulsed neutron sources to measure shutdown parameters related to large thermal power reactors are reported. The experimental work centers around aspects of detecting neutrons in the presence of 10/sup 7/ r/hr gamma fields. The feasibility of U/ sup 235/ coated solid state detectors for use in these measurements is being studied. A theoretlcal investigation is also in progress on the effects of a multi-region assembly on the fundamental decay constant of injected bursts of neutrons. Other work is reported on the time-dependent neutron thermalization for bare multiplying media, particular attention is directed to the exponential time decay for pulsed bare multiplying homogeneous assemblies. Numerical expressions are given for the fundsmental eigenfunction and eigenvalue to the first and second order, respectively. An explicit analytical expression for the eigenfunction is included. (J.R.D.).
Book Synopsis Studies of Neutron Thermalization by the Pulsed Source Technique by : Elyahu Friedman
Download or read book Studies of Neutron Thermalization by the Pulsed Source Technique written by Elyahu Friedman and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photonuclear Contributions to SNS Pulse Shapes by :
Download or read book Photonuclear Contributions to SNS Pulse Shapes written by and published by . This book was released on 2017 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Short-pulsed sources like the Spallation Neutron Source (SNS) and ISIS produce bursts of neutron pulses at rates of 10-60 Hz, with sub-microsecond proton pulses impacting on high-Z target materials. Moderators are grouped around the target to receive the fast neutrons generated from spallation reactions to moderate them effciently to thermal and sub-thermal energies and to feed narrow neutron pulses to neutron scattering instruments. The scattering instruments use the neutrons as a probe for material investigations, and make use of time-of-flight (TOF) methods for resolving the neutron energy. The energy resolution of scattering instruments depends on the narrow time-structure of the neutron pulses, while neutrons in the long tail of the emission time distributions can degrade the instrument performance and add undesired background to measurements. The SNS neutronics team is investigating a possible source term impacting the background at short-pulsed spallation sources. The ISIS TS2 project claims to have significantly reduced neutron scattering instrument background levels by the elimination or reduction of iron shielding in the target-moderator-reflector assembly. An alternative hypothesis, also proposed by ISIS, suggests that this apparent reduction arises from moving beamline shielding away from the neutron guide channels, reducing albedo down the beamlines. In both hypotheses, the background neutrons in question are believed to be generated by photonuclear reactions. If the background neutrons are indeed generated via photonuclear channels, then they are generated in a time-dependent fashion, since most of the high-energy photons capable of inducing photonuclear production are gone within a few microseconds following the proton pulse. To evaluate this e ect, we have enabled photonuclear reactions in a series of studies for the SNS first target station (FTS) taking advantage of its Monte Carlo model. Using a mixture of ENDF/B VII.0 and TENDL-2014 photonuclear cross sections available and the CEM03 physics model within MCNPX 2.6.0 in the simulation, we are able to estimate the impact of photoneutron production on both overall neutron production and delayed neutron production. We find that a significant number of photon-induced neutrons are produced a few milliseconds after the proton pulse, following prompt gamma emission through the capture of neutrons in the slowing-down and thermalization processes. We name these "slowing-down delayed neutrons" to distinguish them from either "activation-delayed neutrons" or "beta-delayed neutrons." The beta-delayed and activation-delayed neutrons were not part of this study, and will be addressed elsewhere. While these other delayed neutron channels result in the time-independent (constant) production of fast neutrons outside of the prompt pulse, the slowing-down delayed neutrons also a ect the shape of the pulses. Although numerically insignificant in most cases, we describe a set of scenarios related to T0-chopper operation in which the slowing-down delayed neutrons may be important.
