Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 76 for “"neutron source"”.
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Aspects of a high intensity neutron source
A unique methodology for creating a neutron source model was developed for deuterons and protons incident on solid phase beryllium and lithium targets. This model was then validated against experimental results already available in literature. The model was found to adequately characterize the …
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Target development for a compact liquid lithium neutron source
Embargo set by: Seth Robbins for item 123347 Lift date: 2024-04-29T21:47:53Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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Dose coefficients for radionuclides produced in a spallation neutron source
… of Energy complex, including the Spallation Neutron Source (SNS) and Accelerator Production of Tritium (APT) Projects.
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Monte Carlo methods, models, and applications for the advanced neutron source
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1990.
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Technical basis for use of a correlated neutron source in the uranium neutron coincidence collar
… by several inspectorates using the uranium neutron coincidence collar (UNCL), which uses neutrons from an americium lithium (241AmLi) source to interrogate the assemblies from one side. Eighteen 3He tubes on the other three sides are used to count the coincidence neutrons from the induced …
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Designing and testing the neutron source deployment system and calibration plan for a dark matter detector
… winch to lower a canister containing a neutron source into the detector where the neutron source pulses to produce calibration data. The winch then pulls the neutron source back out of the detector. We found that the deployment system position is precise to under 0.05 cm, one tenth of …
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The Neutronic Design and Performance of the Indiana University Cyclotron Facility (IUCF) Low Energy Neutron Source (LENS)
Neutron scattering research is performed primarily at large-scale facilities. However, history has shown that smaller scale neutron scattering facilities can play a useful role in education and innovation while performing valuable materials research. This dissertation details the design and …
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The M. I. T. linear accelerator as a pulsed neutron source for a time-of-flight neutron spectrometer
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Physics, 1951.
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Reconsideration of Inherent Neutron Sources in Liquid Fuel of Molten Salt Reactors
Calculation of inherent neutron sources from alpha-n and gamma-n reactions in molten fluoride fuel salts using current gamma-n and alpha-n cross-sections and codes where possible. Original inherent neutron source was calculated for Molten Salt Reactor Experiment (MSRE) in 1959 using then-determined …
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Monte Carlo calculation and analysis of neutron and gamma fields at spallation neutron sources for simulating cosmic radiation
The research of the neutron induced Single Event Effect (SEE) at aircraft altitudes or at ground level are very important since the neutron radiation is able to cause serious errors or damages on electronic components and system. TheWeapons Neutron Research (WNR) facility at Los Alamos Neutron …
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Deposition of Energy From Low-Energy Neutrons in the Icru Tissue Sphere
… of tissue as a result of being bombarded with neutron beams of varying energies, all the way from 0.3 MeV down to thermal. Absorbed dose and dose equivalent values have been obtained throughout the spherical phantom having the ICRU-prescribed 4-element tissue composition. The basic studies …
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The design of an intense accelerator-based epithermal neutron beam prototype for BNCT using near-threshold reactions
Near-threshold boron neutron capture therapy (BNCT) uses proton energies only tens of keV above the (p,n) reaction threshold in lithium in order to reduce the moderation requirements of the neutron source. The goals of this research were to prove the feasibility of this near-threshold concept for …
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Fast neutron resonance radiography for element imaging : theory and applications
Fast Neutron Resonance Radiography (NRR) has been devised as an elemental imaging method, with immediate applications to detecting explosives and drugs in passenger suitcases. In the NRR method, the 2-D elemental mapping of hydrogen, carbon, nitrogen, oxygen and the sum of other elements are …
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An Improved Flexible Neutron Detector For Powder Diffraction Experiments
… of the next generation of spallation sources for neutron scattering. Neutron powder diffraction instruments will be an important element of these facilities and the incorporation of detectors into these instruments with a high neutron capture efficiency is desirable. A new detector …
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Imaging the ionization track of alpha recoils for the directional detection of weapons grade plutonium
… construction of a prototype, directional, fast neutron detector, modeled after the Dark Matter Time Projection Chamber. Fast neutrons are emitted by a host of interesting sources, including medical isotopes, research sources, cosmic neutron spallation, and the most interesting, SNM and WGP. This …
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Deep inelastic neutron scattering and single particle kinetic energies in condensed noble gases
… several condensed noble gases by deep inelastic neutron scattering. The High Resolution Medium Energy Chopper Spectrometer at the Intense Pulsed Neutron Source at Argonne National Laboratory was used to measure the dynamic structure factor at values of the wave-vector transfer between 15 and 30 …
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Gamma-Ray Spectroscopy Following High-Flux 14-Mev Neutron Activation
The Rotating Target Neutron Source (RTNS-I), a high-intensity source of 14-MeV neutrons at the Lawrence Livermore National Laboratory (LLNL), has been used for applications in activation analysis, inertial-confinement-fusion diagnostic development, and fission decay-heat studies. The fast-neutron …
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Development and characterization of a dual neutron and gamma detector
A dual neutron and gamma detection system has been developed for online measurements. The system consists of a single crystal mounted on a photomultiplier tube to detect simultaneously gamma radiation as well as thermal neutrons. A compact data acquisition system has been used for neutron and gamma …
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Monte Carlo model of a low-energy neutron interrogation system for detecting fissile material
(cont.) Further MCNP simulations of the neutron source impinging on cargo containers suggest that this technique can respond, as expected, qualitatively differently to containers containing SNM from containers that do not. Containers that contain small amounts of fissile isotopes as in the case of …
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