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Germanium-Based Detectors for Gamma-Ray Imaging andSpectroscopy

Description: Germanium-based detectors are the standard technology usedfor gamma-ray spectroscopy when high efficiency and excellent energyresolution are desired. By dividing the electrical contacts on thesedetectors into segments, the locations of the gamma-ray interactionevents within the detectors can be determined as well as the depositedenergies. This enables simultaneous gamma-ray imaging and spectroscopyand leads to applications in the areas of astronomy, nuclear physics,environmental remediation, nuclear nonproliferation, and homelandsecurity. Producing the fine-pitched electrode segmentation oftenrequired for imaging has been problematic in the past. To address thisissue, we have developed an amorphous-semiconductor contact technology.Using this technology, fully passivated detectors with closely spacedcontacts can be produced using a simple fabrication process. The currentstate of the amorphous-semiconductor contact technology and thechallenges that remain will be given in this paper.
Date: October 13, 2006
Creator: Amman, Mark; Luke, Paul N. & Boggs, Steven E.
Partner: UNT Libraries Government Documents Department

Experiment summary for n/y attenuation through materials (Environments 1A).

Description: The Radiation Effects Sciences (RES) program is responsible for conducting Neutron Gamma Energy Transport (NuGET) code validation. In support of this task, a series of experiments were conducted in the annular core research reactor (ACRR) to investigate the modification of the incident neutron/gamma environment by aluminum (Al6061) and high-density polyethylene (HDPE) spheres with 4-in and 7-in-diameter. The experiment series described in this report addresses several NuGET validation concerns. The validation experiment series also addresses the design and execution of proper reactor testing to match the hostile radiation environments and to match the component stresses that arise from the hostile radiation environments. This report summarizes the RES Validation: n/{gamma} Attenuation through Materials, Environments 1A, experiments conducted at the ACRR in FY 2003 using ACRR Experiment Plans 933 and 949.
Date: May 1, 2006
Creator: DePriest, Kendall Russell
Partner: UNT Libraries Government Documents Department

Aerial Radiometric and Magnetic Survey: Glasgow National Topographic Map, Montana

Description: Final report documenting a high-sensitivity airborne gamma radiation and magnetic field survey of the Glasgow National Topographic Map segment (NM 13-10 quadrangle) including a description of the program and results with the flight line profile data and statistical analysis results.
Date: 1981
Location Info:
Partner: UNT Libraries Government Documents Department

Aerial Radiometric and Magnetic Survey: Cedar City National Topographic Map, Utah. Rocky Mountain - 1979

Description: From abstract: "The results of analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Cedar City National Topographic Maps, numbered NJ12-7 is presented in this report."
Date: 1980
Creator: Bendix Field Engineering Corporation
Partner: UNT Libraries Government Documents Department

Aerial Radiometric and Magnetic Survey: Limon National Topographic Map, Colorado

Description: Final report documenting a high-sensitivity airborne gamma radiation and magnetic field survey of the Limon National Topographic Map segment (NJ 13-3 quadrangle) including a description of the program and results with the flight line profile data and statistical analysis results.
Date: unknown
Location Info:
Partner: UNT Libraries Government Documents Department

Aerial Radiometric and Magnetic Survey: Kalispell National Topographic Map, Montana

Description: Final report documenting a high-sensitivity airborne gamma radiation and magnetic field survey of the Kalispell National Topographic Map segment (NM 11-12 quadrangle) including a description of the program and results with the flight line profile data and statistical analysis results.
Date: unknown
Location Info:
Partner: UNT Libraries Government Documents Department
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