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 36 for “"Neutron detection"”.
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Use of silicon surface-barrier detectors for neutron detection
… solid stets surface-barrier detectors employed neutron detectors. This research also had the ultimate aim of showing the possibility of producing a neutron spectrometer using the proton recoil telescope with the surface-barrier detector. These objects were fulfilled. From the results with the …
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Synthesis and characterization of lanthanide fluorides for forensic neutron detection
… eventually be used as a forensic and clandestine neutron detector material. There is a need for neutron detectors that have no sensitivity to any other type of radiation and can be used as a forensic tool to go back and look at an event. There is the further requirement that such detectors be hard …
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Advancements in Hexagonal Boron Nitride for Thermal Neutron Detection Applications
… to this research effort, a large thermal neutron capture cross section when 100% isotopically enriched with 10B. However, as with all emerging materials, many important physical properties have yet to be fully explored and documented. Discussed in this dissertation are major achievements …
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Amorphous hydrogenated boron carbide for solid-state direct-conversion thermal neutron detection
… (a-BC:H) is one of a very limited number of neutron-sensitive materials. It has been studied over the last three decades for solid-state thermal neutron detection due to its high resistivity, moderate bandgap, high neutron absorption cross-section, and high stability under harsh physical and …
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Measurement of the fast neutron detection efficiency for a NaI(T1) scintillator
Includes bibliographical references (pages 35-36).
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Construction and Testing of a Portable Time Projection Chamber for Fast Neutron Detection
… in development over the last half century, but neutron detectors have met a higher level of resistance. When monitoring for the potential proliferation of irradiated nuclear fuel, the fast neutron signature from the spontaneous fission of Plutonium-240 offers a window of opportunity for …
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Simultaneous fast and slow neutron detection with superheated droplet detector and real-time readout system
Alternative slow neutron detection technologies are desired in response to needs by homeland security and radiation safety. Superheated droplet detectors (SDD) have the potential to be used in both situations because they have many distinct characteristics, such as photon insensitivity, passive …
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NUCLEATION AND DETECTION IN TENSION METASTABLE FLUIDS
Neutron detection and spectroscopic techniques using state-of-the-art systems is covered. A novel approach using conventional (e.g., LiI, He-3, BF3) detectors coupled with Monte-Carlo code simulations to develop spectroscopy information was developed (in lieu of present-day tedious methods …
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Design of Instrumentation and Methodologies for Determination of Free Neutron Characteristics
Measuring neutron source‐dependent free neutron properties over a large neutron energy range, with human‐portable instrumentation, continues to push the frontier of neutron detection instrumentation design and analysis techniques. In addition, a variety of nuclear nonproliferation and health …
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Development of 3D Silicon radiation detectors for neutrons and high energy charged particles
… in microstructured solid-state thermal neutron detectors have been pursued. These devices feature high aspect-ratio cavities, filled with neutron converter materials, so as to improve the neutron detection efficiency with respect to coated planar sensors. In the framework of the INFN …
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The Calibration of a Fission Chamber at 14 MeV: Accelerator based Neutron Beam Detection
… functionality and will be cross-calibrated for neutron detection against a known fission chamber at Ohio University. The 4-MV Tandem Van De Graaff Accelerator was used to produce a neutron beam for calibration. Initial spectra show that the chamber is functioning properly and has a high signal …
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Neutron Measurements and Reactor Antineutrino Search with the SNO+ Detector in the Water Phase
… detector's energy response and its response to neutrons. The $^{241}$Am$^{9}$Be source emits a unique coincidence signal with the prompt event being a 4.4 MeV $\gamma$ and the delayed a neutron capture signal (2.2 MeV $\gamma$). A novel, minimalistic, statistical analysis of the …
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Development of detectors for the monitoring of mixed radiation fields
… radiation hardness, geometric flexibility, and detection efficiency are increasingly demanding. This work presents two complementary developments addressing these challenges through advanced materials and detector design. First, an innovative thermal neutron detection and imaging device based on …
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Prompt neutrons from fission of 252Cf and 235U
… been made of the n-n angular correlation for neutrons emitted in spontaneous fission of ²⁵²Cf and thermal-neutron- induced fission of ²³⁵U. The dependence of the angular correlation on the neutron detection threshold energy was investigated. These measurements and other experimental data on …
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Intense pulsed neutron generation based on the principle of Plasma Immersion Ion Implantation (PI3) technique
… tritium-deuterium (D-D/ D-T) pulsed neutron generator based on the principle of the Plasma Immersion Ion Implantation (PI3) technique is presented, in terms of investigating development of a compact system to generate an ultra short burst of mono-energetic neutrons (of order 1010 per …
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Monte Carlo simulation of neutron shielding for proton therapy facilities
… to develop a Monte Carlo method of modeling neutron shielding of proton therapy facilities in a complex, realistic environment. The bulk neutron shielding of the Northeast Proton Therapy Center (Massachusetts General Hospital, Boston, MA) was used as the basis of the design work. A …
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The response of organic scintillators to neutrons of energy 14-63 MeV
… by 5 cm cylindrical NE213 liquid scintillator to neutrons has been measured as a function of neutron energy in the range 15-63 Me V, using time-of-flight to select neutron energy. The response function at each neutron energy was separated into components associated with the emission of different …
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Neutron backgrounds in the Ricochet experiment
This paper explores the impact of neutron backgrounds on the Ricochet experiment. The purpose of the Ricochet experiment is to determine the existence of sterile neutrinos via coherent neutrino-nucleus scattering. Coherent neutrino-nucleus scattering is an ideal detection method because it is a …
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