Index Catalog // ScholarsArchive@OSU

The MiniSpec : a low-cost, compact, FPGA-based gamma spectrometer for mobile applications

Creator:: Becker, Eric M.
Abstract:: There is a significant role in emergency response and personal radiation safety that can be played by a compact radiation detector that is capable of identifying radionuclides. Herein is described the design, construction, and characterization of a small, low-cost, low-power gamma ray spectrometer prototype intended to fill this role, conducted...
Resource Type:: Masters Thesis
Full Text:: approved: Abdollah T. Farsoni There is a significant role in emergency response and

Real Time Temporal Spectroscopy for Characterizing Special Nuclear Material

Creator:: Mannino, Mitch
Abstract:: Characterizing special nuclear material (SNM) is critical for nuclear security and non-proliferation. Temporal spectroscopy is a novel and efficient method for characterizing relative material content of special nuclear material. Fission products produced by SNM after being irradiated by a thermal neutron beam can have different half-lives, but can contribute to...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Abi T. Farsoni Characterizing special nuclear material (SNM) is critical for nuclear security

A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring

Creator:: Ranjbar, Lily
Abstract:: Detection of xenon radioisotopes (radioxenons) has proven to be an important method for detecting nuclear explosions and is particularly well suited for detecting undeclared underground testing. The radioxenon isotopes ¹³¹mXe (t₁/₂ = 11.934 d), ¹³³mXe (t₁/₂ = 2.19 d), ¹³³Xe (t₁/₂ = 5.243 d) and ¹³⁵Xe (t₁/₂ = 9.14 h)...
Resource Type:: Dissertation
Full Text:: Abstract approved: ______________________________________________________ Abi T. Farsoni

A Beta-Gamma Radioxenon Detection System using Ultra-Bright Inorganic Scintillators and Solid State Detectors

Creator:: Czyz, Steven A.
Abstract:: The atmospheric detection of four radioxenon isotopes (131mXe, 133mXe, 133Xe, and 135Xe) released during a nuclear detonation is a key tool utilized by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) to identify clandestine nuclear weapon testing activity. These radioxenon isotopes all decay via the near-simultaneous release of an electron and a...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________________________ Abi T. Farsoni The atmospheric detection of four radioxenon isotopes (131mXe, 133mXe, 133Xe

Development of a CZT-Silicon Detection System in Support of the Comprehensive Nuclear-Test-Ban Treaty

Creator:: Alhawsawi, Abdulsalam M.
Abstract:: The Comprehensive Nuclear-Test-Ban Treaty (CTBT) bans all nuclear explosion tests for military or civilian purposes. The International Monitoring System (IMS) was established to verify compliance with the treaty. It consists of several monitoring stations that detect: seismic activities, hydrocoustic activities, infrasound waves, and radionuclide particles and noble gases. Radioxenon detection...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Abi T. Farsoni The Comprehensive Nuclear-Test-Ban Treaty (CTBT) bans all nuclear

Hartree-Fock electronic structure calculations forfree atoms and immersed atoms in an electron gas

Creator:: Walsh, Kenneth Charles
Abstract:: Electronic structure calculations for free and immersed atoms are performed in the context of unrestricted Hartree-Fock Theory. Spherical symmetry is broken, lifting de-generacies in electronic conﬁgurations involving the magnetic quantum number m. Basis sets, produced from density functional theory, are then explored for completeness. Com-parison to spectroscopic data is done...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Kenneth Charles Walsh for the degree of

Near earth object collisional mitigation via intense neutron and photon sources : a study in asteroid interdiction and energy coupling

Creator:: Sanders, JC
Abstract:: The large population of 2r>100m near earth objects (NEOs) presents a certain hazard to life on earth. It has been proposed that a nuclear device may be used to alter the course of such objects, thereby averting a catastrophic collision with the earth. The asteroid interdiction problem includes a number...
Resource Type:: Honors College Thesis
Full Text:: …………………………………….. 12 2.5 Normalized plots of f(θt) and g(θt) as functions of normalized device standoff

Light Pollution and the Limiting Visual Magnitude in Corvallis, Oregon

Creator:: Grellmann, Carsten Christof
Abstract:: This study sought to ascertain the degree to which the night sky of Corvallis is affected by light pollution by determining the limiting visual magnitude. Defined as the brightness of the dimmest star that can be seen with the averted naked eye, the limiting visual magnitude establishes a quantitative standard...
Resource Type:: Honors College Thesis
Full Text:: Acknowledgements I would like to thank my mentor, Dr. Richard Peterson, and my committee members, Dr. Kenneth

Extending the applicability of implicit Monte Carlo Diffusion : frequency dependence and variance reduction using the difference formulation

Creator:: Cleveland, Mathew A.
Abstract:: The intent of this work is to extend Implicit Monte Carlo Diffusion (IMD)[Gen. 2001] to account for frequency dependence and to incorporate the difference formulation[Szo. 2005] as a source manipulation variance reduction technique. This work shows the derivation of the probabilities and the associated proofs which govern the frequency dependent...
Resource Type:: Masters Thesis
Full Text:: thermal photon transport equation, 1 c ∂I(r̄, ν, Ω̄, t) ∂t + Ω̄ · ∇̄I(r̄, ν, Ω̄, t) = −σ(ν)I(r̄, ν, Ω̄

Scaling study of the depressurized conduction cooldown event in the high temperature test facility using RELAP5-3D/ATHENA

Creator:: Aldridge, Robert J.
Abstract:: In 2008, the Department of Energy (DOE) and Nuclear Regulatory Commission (NCR) decided that the Next Generation Nuclear Plant (NGNP) would be the Very High Temperature Reactor (VHTR). In support of the licensing and validation effort of the VHTR, Oregon State University was tasked with designing, building, and operating a...
Resource Type:: Masters Thesis
Full Text:: depressurization with a flow coast down and SCRAM at t=0 with the RCCS in full operation. It was found that for

ScholarsArchive@OSU

The MiniSpec : a low-cost, compact, FPGA-based gamma spectrometer for mobile applications

Real Time Temporal Spectroscopy for Characterizing Special Nuclear Material

A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring

A Beta-Gamma Radioxenon Detection System using Ultra-Bright Inorganic Scintillators and Solid State Detectors

Development of a CZT-Silicon Detection System in Support of the Comprehensive Nuclear-Test-Ban Treaty

Hartree-Fock electronic structure calculations forfree atoms and immersed atoms in an electron gas

Near earth object collisional mitigation via intense neutron and photon sources : a study in asteroid interdiction and energy coupling

Light Pollution and the Limiting Visual Magnitude in Corvallis, Oregon

Extending the applicability of implicit Monte Carlo Diffusion : frequency dependence and variance reduction using the difference formulation

Scaling study of the depressurized conduction cooldown event in the high temperature test facility using RELAP5-3D/ATHENA

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