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W-026, acceptance test report gamma energy assay (GEA) system A(submittal {number_sign}39.8) C3

Description: This test procedure is designed to test all of the functions of the GEA system at the WRAP facility at Hanford, Washington. The procedure is designed to be executed in the sequence given, starting with: * verification of components and labeling * verification or entry of all of the setup parameters * performing the calibrations (energy, efficiency, transmission, and reference peak) * performing the measurements in local mode * performing the measurements in remote mode * confirming the message … more
Date: January 28, 1997
Creator: Watson, T.L., Westinghouse Hanford Co., Richland, WA
Partner: UNT Libraries Government Documents Department
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Network-Oriented Radiation Monitoring System (NORMS)

Description: We have developed a multi-functional pocket radiation monitoring system capable of detecting and storing gamma ray and neutron data and then sending the data through a wireless connection to a remote central facility upon request. The device has programmable alarm trigger levels that can be modified for specific applications. The device could be used as a stand-alone device or in conjunction with an array to cover a small or large area. The data is stored with a date/time stamp. The device may … more
Date: October 1, 2007
Creator: Aryaeinejad, Rahmat & Spencer, David F.
Partner: UNT Libraries Government Documents Department
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Nuclear structure studies with the inelastic neutron scattering rection and gamma-ray detection

Description: The (<i>n</i>, <i>n</i>´(gamma)) reaction has been used at the University of Kentucky accelerator facility to examine the detailed structure of a number of nuclei. The advantages of this method are reviewed, and recent developments are described. Examples of unique nuclear structure studies that have been carried out with this method are presented.
Date: December 10, 1998
Creator: Garrett, P. E.; Warr, N. & Yates, S. W.
Partner: UNT Libraries Government Documents Department
open access

DMSP satellite detections of gamma-ray bursts

Description: Gamma-ray burst detectors are aboard six U. S. Air Force defense Meteorological Satellite Program (DMSP) spacecraft, two of which are currently in use. Their 800-km altitude orbits give a field of view to 117 degrees from the zenith. A great many bursts have been detected, usually in coincidence with detections by GRO or other satellites such as PVO or ULYSSES. The directions of the sources can be determined with considerable accuracy from such correlated observations, even when GRO/BATSE with … more
Date: December 31, 1995
Creator: Terrell, J.; Lee, P. & Klebesadel, R.W.
Partner: UNT Libraries Government Documents Department
open access

A PINHOLE CAMERA AUTORADIOGRAPHIC TECHNIQUE FOR ENCAPSULATED IRRADIATED FUEL SPECIMENS

Description: A gamma pinhole camera was devised to permit a nondestructive examination of irradiated specimens while still in sealed capsules. The camera was designed such that a complete experiment may be withdrawn from an irradiation facility, the specimen autoradiographed, and the experiment then reinserted if so desired. The pinhole aperture is 0.020 in., and the source to pinhole block is 4 ft. The image-to-source sizes are a one-to-one ratio. The resolution of the image is 0.03 in. (auth)
Date: April 1, 1962
Creator: Beck, W.N.
Partner: UNT Libraries Government Documents Department
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Remote Radiological Monitoring

Description: A gamma-radiation telemetering system was utilized to measure fall-out levels at the Ncvada Test Site. Two methods of signal transmission were used: directcoupled field lines for on-site installations and commercial telephone lines for areas out to 330 miles. Graphic and tabular data cover on-site and off- site residual gamma-radiation dose rate measurements taken as a function of time after selected events. (auth)
Date: November 1, 1958
Creator: Sigoloff, S. C. & Borella, H. M.
Partner: UNT Libraries Government Documents Department
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Gamma ray scanner systems for nondestructive assay of heterogeneous waste barrels

Description: Traditional gamma safeguards measurements have usually been performed using a segmented gamma scanning (SGS) system. The accuracy of this technique relies on the assumption that the sample matrix and the activity are both uniform for a segment. Waste barrels are often highly heterogeneous, span a wide range of composition and matrix type. The primary sources of error are all directly or indirectly related to a non-uniform measurement response associated with unknown radioactive source spatial d… more
Date: March 25, 1997
Creator: Martz, H. E.; Decman, B. J.; Roberson, G. P. & Levai, F.
Partner: UNT Libraries Government Documents Department
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Close-Out of FY00 AOP Milestone 6.7.1 (6.6a)

Description: Several types of measurements & equipment were reviewed for the Can MC&amp;A design basis. The measurements & equipment selected were included in the draft System Design Description. Based on the SDD review, the original gamma measurement equipment was changed from a CZT based system to a HPGE system. The current design includes dry calorimeters, HPGE gamma detection system, and scales. This document will briefly discuss the selection of each instrument.
Date: July 28, 2000
Creator: Gould, T H & DiSabatino, A
Partner: UNT Libraries Government Documents Department
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Coplanar-grid detector with single-electrode readout

Description: The coplanar-grid technique provides substantial spectral performance improvement over that of conventional detector designs and electronics when applied to gamma-ray detectors based on compound semiconductors. The technique realizes this improvement by measuring the difference between the induced charge signals from two interdigitated coplanar-grid electrodes. By adjusting the relative gain between the two grid signals prior to subtraction, the difference signal can be made less sensitive to t… more
Date: April 1, 1997
Creator: Amman, M. & Luke, P. N.
Partner: UNT Libraries Government Documents Department
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A method to improve spectral resolution in planar semiconductor gamma-ray detectors

Description: This paper describes an empirically derived algorithm to compensate for charge trapping in CdTe, CdZnTe, and other planar semiconductor detectors. The method is demonstrated to be an improvement over available systems and application to experimental data is shown.
Date: May 1, 1995
Creator: Keele, B. D.; Addleman, R. S. & Troyer, G. L.
Partner: UNT Libraries Government Documents Department
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A tunable crystal diffraction telescope for the International Space Station

Description: Even though technically innovative, a tunable crystal diffraction telescope for use in nuclear astrophysics has become feasible today. The focusing gamma-ray telescope the authors intended to propose for the space station consists of a tunable crystal diffraction lens, focusing gamma-rays onto a small array of Germanium detectors perched on an extendible boom. While the weight of such an instrument is less than 500 kg, it features an angular resolution of 15 inches, an energy resolution of 2 ke… more
Date: February 1, 1997
Creator: Ballmoos, P. von; Kohnle, A.; Olive, J.F.; Vedrenne, G.; Smither, R.K.; Fernandez, P.B. et al.
Partner: UNT Libraries Government Documents Department
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Using NAI detectors for tomographic gamma scanning

Description: The authors examined two approaches for using NaI detectors to perform transmission corrections used in the tomographic gamma scanner (TGS) and segmented gamma scanner (SGS) nondestructive assay methods. They found that a material-basis-set (MBS) fit using empirical logarithmic response spectra is quite accurate. Because this is a gross count technique, it gives sensitivities (for equal numbers of detectors) that are roughly ten times better than those obtained using Germanium detectors. The au… more
Date: March 1, 1997
Creator: Estep, R.J. & Melton, S.
Partner: UNT Libraries Government Documents Department
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Xenon Gamma Detector Project Support

Description: This project provided funding of $48,500 for part of one year to support the development of compressed xenon spectrometers at BNL. This report describes upgrades that were made to the existing detector system electronics during that period, as well as subsequent testing with check sources and Special Nuclear Materials. Previous testing of the equipment extended only up to the energy of 1.3 MeV, and did not include a spectrum of Pu-239. The new electronics allowed one-button activation of the hi… more
Date: April 1, 2008
Creator: Vanier, P. E. & Forman, L.
Partner: UNT Libraries Government Documents Department
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Proposed Emulsion Experiment Search for Short Lived Particles at High Energies

Description: It is proposed to conduct an experiment at the National Accelerator Laboratory concerned with the search for new particles having lifetimes between 10{sup -17} and 10{sup -12} second. The experiment will be conducted with an emulsion chamber arranqement and will explore for particles with lifetimes too short to be observed directly with other instruments. Two sidelines of the experiment will be concerned with an improved measurement of the lifetime of the neutral pion and the search for gamma r… more
Date: April 19, 1972
Creator: Kotzer, Peter; Lord, J.J. & U., /Washinton
Partner: UNT Libraries Government Documents Department
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Progress Report on the Advanced Large-Area Plastic Scintillators (ALPS) Project

Description: The U.S. Department of Energy tasked Pacific Northwest National Laboratory to investigate possible technological avenues for substantially advancing the state-of-the-art in gamma detection via large-area plastic scintillators. This letter report describes progress to date on this project. Early phases of the project, which commenced in January 2003, have focused on (1) quantifying the light-collection efficiency in plastic scintillator sheets as a function of photomultiplier tube positioning an… more
Date: May 14, 2003
Creator: Jordan, David V.; Geelhood, Bruce D.; Reeder, Paul L.; Stephens, Daniel L.; Craig, Richard A. & McIntyre, Justin I.
Partner: UNT Libraries Government Documents Department
open access

Semiconductor Radiation Detectors with Frisch Collars and Collimators for Gamma Ray Spectroscopy and Imaging

Description: To study CdZnTe as a high energy resolution gamma ray detector with a novel new design, and to build a detector array from the new detector design
Date: December 4, 2006
Creator: McGregor, Douglas; Kargar, Alireza; Harrison, Mark; Brooks, Adam; McNei, Walter; Lowell, Rans et al.
Partner: UNT Libraries Government Documents Department
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Neutron-proton bremsstrahlung experiments

Description: It is well known that charged particles emit bremsstrahlung radiation when they are accelerated. Classical electron bremsstrahlung occurs when a photon is emitted by an electron accelerated in the field of a nucleus. The bremsstrahlung process also occurs in the scattering of nucleons, for which it is the lowest energy inelastic process that can occur. Like electron bremsstrahlung, nucleon-nucleon bremsstrahlung also requires the exchange of a virtual particle to conserve energy and momentum. I… more
Date: December 1, 1992
Creator: Koster, J. E.; Nelson, R. O.; Schillaci, M. E.; Wender, S. A.; Mayo, D.; Brady, F. P. et al.
Partner: UNT Libraries Government Documents Department
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