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Filtering by: Creator Reiff, Steven D. Remove constraint Creator: Reiff, Steven D. Advisor Hamby, David M. Remove constraint Advisor: Hamby, David M.

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  • Beta-particle backscatter factors and energy-absorption scaling factors for use with dose-point kernels

    Creator:
    Mangini, Colby D.
    Abstract:
    'Hot particle' skin dosimetry calculations are commonly performed using homogeneous dose-point kernels (DPK) in conjunction with scaling and backscatter models to account for non-homogeneous geometries. A new scaling model for determining the actual DPK for beta-particles transmitted by a high-Z source material has been developed. The model is based on...
    Resource Type:
    Dissertation
    Full Text:
    Colby D. Mangini for the degree of Doctor of Philosophy in Radiation Health Physics presented on

  • Retrospective thermal neutron fluence determination using lithium-ion mobile telephone batteries

    Creator:
    Dorrell, Nick J.
    Abstract:
    Fortuitous dosimeters are radiosensitive objects carried by an individual who was exposed to radiation. These objects can be analyzed some time after exposure and the results can be used to aid in calculating radiation fields and doses received by individuals. Items that make good fortuitous dosimeters are those that are...
    Resource Type:
    Masters Thesis
    Full Text:
    te c or re sp on di ng to d os e eq ui va le nt ra te o f 1 re m ·h r-1 (n eu tr

  • Use of CR-39 for nuclear criticality accident dosimetry and high neutron dose monitoring

    Creator:
    Tai, Lydia I.
    Abstract:
    CR-39 foils were irradiated as part of nuclear accident dosimetry experiments using the Godiva reactor at the Nevada National Security Site and the Caliban and Prospero reactors at the Valduc Centre for Nuclear Studies in France. The irradiated foils were chemically etched using the standard Lawrence Livermore National Laboratory process...
    Resource Type:
    Masters Thesis
    Full Text:
    to this work are fluence (Φ) and tissue absorbed dose (D). In the context of criticality accident

  • Development of a Fundamental Depth-Dependent Neutron Dosimetry Model

    Creator:
    Anspach, Logan J.
    Abstract:
    Current neutron dosimetry methods rely on the assumption that charged particle equilibrium (CPE) is established within the tissue medium. This maintains that the kinetic energy transferred to the medium (KERMA) is equivalent to absorbed dose. However, this assumption is only valid for large volumes such as the whole body. For...
    Resource Type:
    Masters Thesis
    Full Text:
    .................................................................. 35 Figure 14: fcpe comparisons (a) 5 MeV (b) 10 MeV (c) 14 MeV (d) 20 MeV .... 37 Figure 15: ICRU

  • Human Eye Dosimetry: Air Gap Analysis by Shield Placement and Photon Energy

    Creator:
    Herrera, Joshua P.
    Abstract:
    When the ICRP updated their recommended limits for eye dose, they ignited a renewed interest in eye dosimetry. Especially, how the updated eye dose estimates affect current regulations and what that would mean to a radiation worker. Radiation workers are commonly required to wear leaded eyeglasses to reduce their dose...
    Resource Type:
    Masters Thesis
    Full Text:
    ………………………………………………………...…62 Appendix D: Protection Factor to Photon Energy Curve ………………………………………………...67 Appendix E

  • Eye Lens Doses from Oblique Sources

    Creator:
    Trakowski, Ian M.
    Abstract:
    Since the International Commission on Radiation Protection (ICRP) recommended a revision to the eye lens dose limits in ICRP Publication 118 (Stewart, 2012) the radiation protection community has conducted many new studies related to eye dosimetry. The recommended reduction of eye lens dose limits may result in the reduction of...
    Resource Type:
    Masters Thesis
    Full Text:
    APPENDIX D: KERMA vs. Absolute Distance ...............................................................77

  • Progress in the development of a portable phoswich-style skin contamination dosimeter

    Creator:
    Tang, Matthew M.
    Abstract:
    The Code of Federal Regulations (10CFR20.1201) mandates occupational dose limits to the shallow, lens and deep tissue layers. The NRC-accepted procedure of estimating dose to these layers from contamination events is laborious. The current work aims to further the development of a portable phoswich-style skin dosimeter that will operate in...
    Resource Type:
    Masters Thesis

  • A beta dosimeter and spectrometer utilizing plastic scintillators and a large-area avalanche photodiode

    Creator:
    Kriss, Aaron A.
    Abstract:
    The purpose of this research was to develop and test a radiation detector to perform beta dosimetry and spectroscopy. The detector utilizes plastic scintillator volumes to produce scintillation light in proportion to the amount of energy deposited in them, and a large-area avalanche photodiode to convert the light to electrical...
    Resource Type:
    Dissertation
    Full Text:
    Head of t D''partment of Nuclear Engineering and Radiation Health Physics Dean of the I understand