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Filtering by: Has journal Astrophysical Journal Committee Member Krane, Kenneth S.

Diffusion Accelerated Implicit Monte Carlo via Nonlinear Elimination for Thermal Radiative Transfer

Creator:

Lam, Adam Q.

Abstract:

In this dissertation, we derive and implement a new transport-diffusion hybrid algorithm for solving thermal radiative transfer (TRT) problems. Using the method of nonlinear elimination (NLEM), the TRT system of equations can be written in terms of a transport equation with the absence of scattering and a diffusion equation. The...

Resource Type:

Dissertation
Development of a Radioxenon Detection System using Stilbene and Strontium Iodide

Creator:

Gadey, Harish R.

Abstract:

The Comprehensive Nuclear-Test-Ban Treaty (CTBT) prohibits the testing of nuclear weapons on the face of the earth. The detection of atmospheric radioxenon (131mXe, 133m/133Xe, and 135Xe) plays an important role in the identification of sub-surface clandestine nuclear weapon explosions. Since the radioxenon identified above decay via two radiation in coincidence,...

Resource Type:

Dissertation
Breaking of spherical symmetry in electronic structure, free and immersed atoms in an electron gas

Creator:

Dorsett, Skye Forrest

Abstract:

Total electronic energies are calculated numerically for free and singly-ionized He, Li, C, and Ne atoms using density functional theory. Immersion energies are calculated for a single C impurity atom embedded or absorbed into a charge-neutral system composed of a free-electron gas with uniform positive background, also called 'jellium'. Nonspherical...

Resource Type:

Dissertation