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Energy response and dose-rate calibration of a Geiger-Mueller gamma-ray detector

Description: To obtain more precise dose-rate measurements, we have taken a commercial gamma-ray dosimeter that uses a Geiger-Mueller (GM) tube as its detector and, by supplying it with an externally regulated high voltage, counted the gamma-ray-induced pulses with suitable scaling and timing circuits. We have now improved the method of calibration by measuring detector response to 13 different sources, each with an independently verified strength, in the energy range from 60 keV to 2.6 MeV. With the use of… more
Date: January 1, 1984
Creator: Plassmann, E.A.; Pederson, R.A. & Moss, C.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Performance specifications for health physics instrumentation: portable instrumentation for use in normal work environments. Part 2. Test results

Description: The Pacific Northwest Laboratory evaluated a draft American National Standards Institute Standard N42.17 (ANSI N42.17) on performance specifications for health physics instrumentation through a project jointly funded by the US Department of Energy and the US Nuclear Regulatory Commission. The evaluation involved testing a representative cross section of instruments against criteria in the standard. This report presents results of the testing program. A brief history of the project is included i… more
Date: September 1, 1986
Creator: Kenoyer, J. L.; Swinth, K. L.; Stoetzel, G. A. & Selby, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New-generation low-power radiation survey instruments. [Powered by capacitor]

Description: A number of new, ultra-low-powered radiation instruments have recently been developed at Los Alamos. Among these are two instruments which use a novel power source to eliminate costly batteries. The newly developed gamma detecting radiac, nicknamed the Firefly, and the alpha particle detecting instrument, called the Simple Cordless Alpha Monitor, both use recent advances in miniaturization and power-saving electronics to yield devices which are small, rugged, and very power-frugal. The two inst… more
Date: January 1, 1983
Creator: Waechter, D. A.; Bjarke, G. O.; Wolf, M. A.; Trujillo, F. & Umbarger, C. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Gamma-ray dosimetry measurements of the Little Boy replica

Description: We present the current status of our gamma-ray dosimetry results for the Little Boy replica. Both Geiger-Mueller and thermoluminescent detectors were used in the measurements. Future work is needed to test assumptions made in data analysis.
Date: January 1, 1984
Creator: Plassmann, E.A. & Pederson, R.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Microcomputer based shelf system to monitor special nuclear materials in storage

Description: Diversion of special nuclear material has become a matter of grave concern in recent years. Large quantities of this material are kept in long-term storage and must be inventoried periodically, resulting in a time-consuming activity that exposes personnel to additional radiation. A system that provides continuous surveillance of stored special nuclear materials has been developed. A shelf monitor has been designed using a single component microcomputer to collect data from a Geiger Muller tube … more
Date: January 1, 1980
Creator: Nicholson, N.; Kuckertz, T.H. & Ethridge, C.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Surface radiation survey and soil sampling of the 300-FF-1 operable unit, Hanford Site, southeastern Washington: A case study

Description: The methods used for conducting a radiological characterization of the soil surface for the Phase I Remedial Investigation of a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) site is presented via a case study. The study site is an operable unit (300-FF-1) located in and adjacent to the 300 Area of the US Department of Energy's Hanford Site in southeastern Washington State. The operable unit contains liquid and solid waste disposal facilities associated with nucl… more
Date: October 1, 1990
Creator: Teel, S. S. & Olsen, K. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurements of the PLT and PDX device activation

Description: Measurements of the activation levels around the PLT and PDX tokamaks have been made using a Ge(Li) gamma spectrometer and a Geiger counter. The activation results from radiation induced in the plasma by 14 MeV neutrons from the d(t,n)..cap alpha.. fusion reaction, 14.7 MeV protons from the d(/sup 3/He,p)..cap alpha.. fusion reaction, 10 ..-->.. 20 MeV hard x-rays from runaway electron induced bremmstrahlung, and 2.5 MeV neutrons from the d(d,n)/sup 3/He fusion reaction. The magnitude of the ac… more
Date: September 1, 1981
Creator: Stavely, J.; Barnes, C. W.; Chrien, R. E. & Strachan, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Some solutions to on-line radiological monitoring of difficult streams

Description: On-line monitoring for radiological contamination of dirty, but normally not radioactive, streams is difficult. Described are several new, low-fouling units that are intended to replace the existing sensors that monitor both beta and gamma activity. A sensor was designed, using a thin-wall Geiger-Mueller tube for beta and gamma sensitivity, to monitor the influent of the sanitary sewage treatment plant. The new design eliminates dead volumes inherent in the old unit by use of a double-layer, he… more
Date: January 1, 1987
Creator: Bauer, M.L. & Ramsey, J.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Verification station for Sandia/Rockwell Plutonium Protection system

Description: A verification station has been designed to confirm the presence of plutonium within a container module. These container modules (about 13 cm (5 in.) in diameter and 23 cm (9 in.) high) hold sealed food-pack cans containing either plutonium oxide or metal and were designed by Sandia Laboratories to provide security and continuous surveillance and safety. After the plutonium is placed in the container module, it is closed with a solder seal. The verification station discussed here is used to con… more
Date: April 1, 1979
Creator: Nicholson, N.; Hastings, R.D.; Henry, C.N. & Millegan, D.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pressure regulation system for modern gas-filled detectors

Description: A gas pressure and flow regulation system has been designed and constructed to service a wide variety of gas-filled detectors which operate at pressures of approx.2 to 1000 Torr and flow rate of approx.5 to 200 standard cubic centimeters per minute (sccm). Pressure regulation is done at the detector input by a pressure transducer linked to a solenoid leak valve via an electronic control system. Gas flow is controlled via a mechanical leak valve at the detector output. Interchangeable transducer… more
Date: August 1, 1986
Creator: McDonald, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New generation of radiacs: small computerized multipurpose radiation monitors

Description: The Health Division at Los Alamos has developed a multipurpose radiation monitoring device that is computer-controlled, light weight (3 lb), includes multiple radiation detectors running simultaneously, and is simple to use. This multipurpose radiac is generic in nature and can use any of the standard radiation detectors such as NaI, /sup 3/He, LET proportional gas counters, solid state surface barrier detectors, etc. LCD displays indicate the various radiation parameters in both alphanumeric a… more
Date: January 1, 1982
Creator: Umbarger, C. J.; Bjarke, G. O.; Erkkila, B. H.; Trujillo, F.; Waechter, D. A. & Wolf, M. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Instrumentation and Controls Division biennial progress report, September 1, 1976--September 1, 1978

Description: Progress is summarized in the following research and development areas: electronic circuits;instruments; radiation monitoring; process systems and instrumentation; thermometry; instrumentation for engineering experiments and test loops; HTGR fuel recycle development; reactor measurements and analysis; automatic control and data acquisition; electronic engineering support for research facilities; miscellaneous engineering services, studies, and developments; maintenance; and environmental scienc… more
Date: November 1, 1978
Creator: Sadowski, G.S. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Surface radiation survey for the Phase 1 remedial investigation of the 300-FF-1 operable unit on the Hanford Site

Description: This report summarizes Task 3a-1 of the Phase I Remedial Investigation for the 300-FF-1 Operable Unit on the Hanford Site, near Richland, Washington. The purpose of the Remedial Investigation is to determine the nature and extent of the risk presented by releases of hazardous substances from the operable unit. The purpose of Task 3a-1 was to locate any areas of contaminated soil outside of operable unit waste facility boundaries. Surface radiation survey and sampling activities in the 300-FF-1 … more
Date: October 1, 1990
Creator: Teel, S. S. & Olsen, K. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Explaining cloud chamber tracks

Description: The operation of many detection devices is usually explained in terms of the ionization tracks produced by particles despite the fact that the corresponding incident wave functions extended over the entire sensitive regions of the detectors. The mechanisms by which the wave function appears to collapse to a track is analyzed here.
Date: June 16, 1992
Creator: Broyles, A. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Explaining cloud chamber tracks

Description: The operation of many detection devices is usually explained in terms of the ionization tracks produced by particles despite the fact that the corresponding incident wave functions extended over the entire sensitive regions of the detectors. The mechanisms by which the wave function appears to collapse to a track is analyzed here.
Date: June 16, 1992
Creator: Broyles, A. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measuring the absolute disintegration rate of a radioactive gas with a moveable endplate discharge counter (MEP) and theoretical calculation of wall effect

Description: A precision built moveable endplate Geiger-Mueller counter was used to measure the absolute disintegration rate of a beta-emitting radioactive gas. A Geiger-Mueller counter used for measuring gaseous radioactivity has <100% counting efficiency owing to two factors: (1) ''end effect,'' due to decreased and distorted fields at the ends where wire-insulator joints are placed, and (2) ''wall effect,'' due to non-ionization by beta particles emitted near to and heading into the wall. The end effect … more
Date: September 1, 1987
Creator: Jaffey, A. H.; Gray, J.; Bentley, W. C. & Lerner, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DETECTION AND TELEMETERING OF IONIZING RADIATION BY FREQUENCY VARIATION

Description: Three methods are discussed for detecting ionizing radiation and transitting the intelligence. All three methods make use of the reactamce variation of a frequency determining network, to vary the frequency of an R.F. transitter as a function of ionizing radiation entering an ion chamber or counter. The first method is based on the capacitance znd subsequent frequency variation of am electrometer incorporated in an ion chamber. The variation is achieved by a moving came electrometer, where the … more
Date: September 30, 1955
Creator: Richards, H K
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DETECTION OF ThO$sub 2$ CONTAMINATION IN SIMULATED CUTS AND ABRASIONS

Description: Tests have been made to determine the sensitivity of various radiation detection instruments for known amounts of ThO/sub 2/ contained in simulated cuts and abrasions. A shielded Geiger-Mueller counter tube can be expected to detect at least 0.1 mg ThO/sub 2/ when counting for a reasonable length of time provided the ThO/sub 2/ deposit is on the surface of the subject being counted. A shielded gamma-spectrometer-crystal, set at a 50-kev cutoff, can be expected to detect at least 0.5 mg ThO/sub … more
Date: January 15, 1959
Creator: Thomas, D. G. & Hilyer, J. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MESERAN Calibration for Low Level Organic Residues

Description: Precision cleaning studies done at Honeywell Federal Manufacturing & Technologies (FM&amp;T), the Kansas City Plant (KCP), and at other locations within the Department of Energy (DOE) Weapons complex over the last 30 years have depended upon results from MESERAN Evaporative Rate Analysis for detecting low levels of organic contamination. The characterization of the surface being analyzed is carried out by depositing a Carbon-14 tagged radiochemical onto the test surface and monitoring the rate … more
Date: April 8, 2004
Creator: Benkovich, M.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electronics progress report, December 1--31, 1948

Description: Equipment and supplies are being packed for moving to Mound Laboratory. Work was started on the development of a cathode-follower circuit to match a B-wall tube to its connecting cable. The final report and maintenance manual for the scaler-multiplier are almost finished. The 10 millivolt Speedomax recorder used by Group 3 in the study of electrodeposition potentials has been replaced with a 150 millivolt Speedomax, utilizing two recording points for simultaneous recording of radioactive deposi… more
Date: December 31, 1948
Creator: Heyd, J. W. & Ohmart, P. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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