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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 51 for “"Scintillators"”.
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A new approach to neutron spectrometry with multi-element scintillators
… exploiting new developments and high sensitivity scintillators, in this thesis, a new approach has been adopted using different nuclear reaction processes with different contents of scintillating material. More specifically, two nuclear reactions, i.e. (n,α) and (n,p), on two different elements …
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An investigation into surface effects in thin film plastic scintillators
… the luminescent response of thin film plastic scintillators as a function of their method of preparation is made. Investigations are carried out on NE102A and NE118 using four different methods of preparation. It is found that the Birks model for luminescence as a function of film thickness …
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Studies of neutron inelastic scattering in crystal and liquid scintillators
… the feasibility of using crystal, liquid and gel scintillators for the study of neutron inelastic scattering from elements, contained or loaded in the scintillators. The nuclides included those of iodine, cesium, lanthanum, holmium, praseodymium and bismuth. investigations showed that the …
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The response of organic scintillators to neutrons of energy 14-63 MeV
The response of a 5 cm (diameter) 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 …
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Development of metal loaded liquid scintillators for future detectors to investigate neutrino properties
… experiments call for metal loaded liquid scintillators for neutrino detection. The challenge in the development of such scintillators is how to dissolve large amounts of the metal in an organic liquid scintillator without degrading the optical properties. A promising new approach is the …
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Polymerizable dopants capable of high light output and pulse shape discrimination for application in plastic scintillators
Scintillators have long been established for radiation detection and even date back to 1917 in which the use of a scintillator led to the discovery of the proton. Of particular interest are plastic scintillators (PS) which are low cost plastics doped with organic fluorescent compounds. In addition, …
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Search for Soft Unclustered Energy Patterns at the Large Hadron Collider and studies of radiation damage in plastic scintillators
… presents studies of radiation damage to plastic scintillators, used to produce signals in the CMS calorimeter system, and a search for a beyond-the-Standard-Model particle, the Soft Unclustered Energy Pattern (SUEP). The effects of ionizing radiation on the light output and the optical properties …
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Coupled Rate and Transport Equations Modeling Light Yield, Pulse Shape, and Proportionality to Energy in Electron Tracks: A Study of CsI and CsI:Tl Scintillators
This dissertation reports on development and testing of a scintillation response model of progressive comprehensiveness that computes emission intensity over time and space in electron tracks by solving coupled rate and transport equations describing both the movement and the linear and nonlinear …
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An absolute measurement of the photodisintegration of deuterium
… MWPC chambers surrounded by segmented plastic scintillators. The target cylinder is on the axis of the chamber. Particles were collected from 20° to 160°, the angle determined by the charge division technique in the wire chamber. The ~~ measurements in the wire chamber and the scintillators …
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3D Scintillator Detector Quenching Characterization For Scanning Proton Beams
… of this project is to improve volumetric scintillators detectors to provide 3D measurements for applications for beam commissioning, quality assurance program, and patient-specific treatment delivery verification.</p> <p>Detectors based on volumetric scintillators are gaining interest for …
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Neutron-deuteron breakup and quasielastic scattering
… are detected by a wall of neutron time-of-flight scintillators, and scattered protons are detected by two scintillators and a wire chamber. This setup allows for measurement of the incident neutron energy, scattered neutron energy, and scattered proton energy, as well as the scattering angle and …
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An innovative portable detector for the live-monitoring of radionuclides in small terrestrial animals
… The optimised design contains two caesium iodide scintillators and two plastic scintillators, which enable the measurement of 137Cs and 90Sr respectively; all four scintillators were shaped and positioned to maximise detection from the organism. Four photomultiplier tubes collect light from the …
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Plastic scintillation spectrometry
Plastic scintillators provide homeland security organisations with large area, low cost gamma-ray counters at international borders. Currently these detectors cannot distinguish between the sources they detect, leading to high false alarm rates during primary screening. These alarms must be …
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Izovalentiškai legiruotų cinko selenido scintiliacinių kristalų priemaišinės liuminescencijos tyrimai /
… in isoelectronically doped semiconductor ZnSe scintillators. The study provides a deeper insight into the basic mechanisms of defect-related luminescence in these scintillation crystals and to relate the luminescence efficiency and response time characteristics with the crystal growth …
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Izovalentiškai legiruotų cinko selenido scintiliacinių kristalų priemaišinės liuminescencijos tyrimai /
… in isoelectronically doped semiconductor ZnSe scintillators. The study provides a deeper insight into the basic mechanisms of defect-related luminescence in these scintillation crystals and to relate the luminescence efficiency and response time characteristics with the crystal growth …
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Feasibility Analysis and Prototype Measurements of a Novel Approach for the Real-Time Spectroscopy of Low Energy Solar Neutrinos
… be modular and the target dissolved in liquid scintillators. The Yb-176 tag is difficult, because of the short delay (lifetime=50 ns) and low energy (E=72 keV) of the coincident event. The background due to statistical self-correlations of single events was investigated. This included the …
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NUCLEAR COLLECTIVE MODES AT FINITE TEMPERATURE AS A PROBE OF NUCLEAR STRUCTURE AND DYNAMICS
… decay. The first one is the HECTOR array of BaF2 scintillators, the second one is a group of PHOSWICH scintillators and the third one is the GARFIELD DE-E array of microstrip gas chambers coupled to CsI scintillators. The results obtained with the N/Z-asymmetric 16O+116Sn reaction at beam energies …
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Toward a User's Toolkit for Modeling Scintillator Nonproportionality and Light Yield
… with models describing carrier transport in scintillators, which is able to build a user's toolkit for analyzing any existing and potential scintillators. In the dissertation, progress in calculating electronic structure of traps and activators, diffusion coefficients and rate functions, and …
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