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The response of survey meters to pulsed radiation fields

Description: The response of most survey meters to steady radiation fields is fairly well known and documented. However, hardly any data is available in the literature regarding the response of these instruments to pulsed radiation. Pulsed radiation fields are encountered, e.g., in the vicinity of linear electron accelerators or klystrons. An instrument that ordinarily responds well to the average dose rate spread out evenly in time may not be able to cope with such a high dose rate. Instruments which have … more
Date: November 1, 1987
Creator: McCall, R.C. & Ipe, N.E.
Partner: UNT Libraries Government Documents Department
open access

PHOTON: A program for synchrotron radiation dose calculations

Description: A computer program, PHOTON, has been developed to calculate radiation levels associated with a general synchrotron beamline arrangement. PHOTON calculates the transmitted an scattered spectra as the synchrotron beam passes through sequential filters. The Compton component of this scattered radiation can then be passed through a series of materials composing a shielding wall. This radiation can then be used to calculate a dose in a medium outside of the shielding wall. Program input is such that… more
Date: January 1, 1987
Creator: Chapman, D.; Gmeur, N.; Lazarz, N. & Thomlinson, W.
Partner: UNT Libraries Government Documents Department
open access

Neutron yield of medical electron accelerators

Description: Shielding calculations for medical electron accelerators above about 10 MeV require some knowledge of the neutron emission from the machine. This knowledge might come from the manufacturer's specifications or from published measurements of the neutron leakage of that particular model and energy of accelerator. In principle, the yield can be calculated if details of the accelerator design are known. These details are often not available because the manufacturer considers them proprietary. A broa… more
Date: November 1, 1987
Creator: McCall, R.C.
Partner: UNT Libraries Government Documents Department
open access

Low-level radioactive waste disposal at a humid site

Description: Waste management in humid environments poses a continuing challenge because of the potential contamination of groundwater in the long term. Short-term needs for waste disposal, regulatory uncertainty, and unique site and waste characteristics have led to the development of a site-specific waste classification and management system proposed for the Oak Ridge Reservation. The overlying principle of protection of public health and safety is used to define waste classes compatible with generated wa… more
Date: March 1, 1987
Creator: Lee, D. W.
Partner: UNT Libraries Government Documents Department
open access

1987 Oak Ridge model conference: Proceedings

Description: A conference sponsored by the United States Department of Energy (DOE), was held on waste management. Topics included waste management, site remediation, waste minimization, economic and social aspects of waste management, and waste management training. Several case studies of US DOE facilities are included. Individual projects are processed separately for the data bases. (CBS)
Date: October 1, 1987
Partner: UNT Libraries Government Documents Department
open access

An overview of the IAEA Safety Series on procedures for evaluating the reliability of predictions made by environmental transfer models

Description: The International Atomic Energy Agency is preparing a Safety Series publication on practical approaches for evaluating the reliability of the predictions made by environmental radiological assessment models. This publication identifies factors that affect the reliability of these predictions and discusses methods for quantifying uncertainty. Emphasis is placed on understanding the quantity of interest specified by the assessment question and distinguishing between stochastic variability and lac… more
Date: October 1, 1987
Creator: Hoffman, F. W. & Hofer, E.
Partner: UNT Libraries Government Documents Department
open access

Droplet size characteristics and energy input requirements of emulsions formed using high-intensity-pulsed electric fields

Description: Experimental methods have been developed to measure droplet size characteristics and energy inputs associated with the rupture of aqueous droplets by high-intensity-pulsed electric fields. The combination of in situ microscope optics and high-speed video cameras allows reliable observation of liquid droplets down to 0.5 ..mu..m in size. Videotapes of electric-field-created emulsions reveal that average droplet sizes of less than 5 ..mu..m are easily obtained in such systems. Analysis of the ene… more
Date: January 1, 1987
Creator: Scott, T.C. & Sisson, W.G.
Partner: UNT Libraries Government Documents Department
open access

Particle Cosmology Comes of Age

Description: The application of modern ideas in particle physics to astrophysical and cosmological settings is a continuation of a fruitful tradition in astrophysics which began with the application of atomic physics, and then nuclear physics. In the past decade particle cosmology and particle astrophysics have been recognized as 'legitimate activities' by both particle physicists and astrophysicists and astronomers. During this time there has been a high level of theoretical activity producing much specula… more
Date: December 1, 1987
Creator: Turner, M. S.
Partner: UNT Libraries Government Documents Department
open access

Transverse energy distributions in Si + nucleus collisions at 10 GeV/nucleon

Description: Transverse energy distributions have been measured for collisions of 10 GeVnucleon Si with targets of Al, Cu and Pb using a combination of a NaI wall and a uranium based sampling calorimeter. The measured cross sections d..sigma..dE/sub T/ and dE/sub T/d)eta are consistent with full stopping and an increase, with increasing values of E/sub T/, of energy flow into large angles. 4 refs., 7 figs., 2 tabs
Date: August 1, 1987
Creator: Bassalleck, B; Braun-Munzinger, P.; Cleland, W.; G., David; Farooq, A.; Fatyga, M. et al.
Partner: UNT Libraries Government Documents Department
open access

Operating experience of the IFSMTF (International Fusion Superconducting Magnet Test Facility) vapor-cooled lead system

Description: The International Fusion Superconducting Magnet Test Facility (IFSMTF) uses six pairs of vapor-cooled leads (VCLs) to introduce electric power to six test coils. Each VCL is housed in a dewar outside the 11-m vacuum vessel and is connected to the coal via a superconducting bus duct;the various VCLs are rated at 12 to 20 kA. Heat loss through the leads constitutes the single largest source of heat load to the cryogenic system. Concerns about voltage breakdown if a coil quenches have led to preca… more
Date: January 1, 1987
Creator: Lue, J. W.; Fehling, D. T.; Fietz, W. A.; Lubell, M. S.; Luton, J. N.; Schwenterly, S. W. et al.
Partner: UNT Libraries Government Documents Department
open access

Recent measurements of the B hadron lifetime

Description: Recent measurements of the B hadron lifetime from PEP and PETRA experiments are presented. These measurements firmly establish that the B lifetime is long (approx.1 psec), implying that the mixing between the third generation of quarks and the lighter quarks is much weaker that the mixing between the first two generations.
Date: December 1, 1987
Creator: Ong, R.A.
Partner: UNT Libraries Government Documents Department
open access

Aurora status and plans

Description: Aurora is a short wavelength (248 nm) 10 to kJ KrF laser systems in the ICF program at Los Alamos National Laboratory. It is both an experiment in driver technology and a means for studying target performance using KrF laser light. Both features will be used to help evaluate the uv excimer laser as a viable fusion driver. The system has been designed to employ several electron-beam pumped amplifiers in series, with a final aperture of one meter square, to amplify 96 angularly mulitplexed 5 ns b… more
Date: October 1, 1987
Creator: Kristal, R.; Blair, L. S.; Burrows, M. D.; Cartwright, D. C.; Goldstone, P. D.; Greene, D. P. et al.
Partner: UNT Libraries Government Documents Department
open access

Tracer diffusion of /sup 60/Co and /sup 63/Ni in amorphous NiZr alloy

Description: Tracer diffusion of /sup 60/Co and /sup 63/Ni in equiatomic amorphous NiZr alloy in the temperature range between 486 and 641/sup 0/K can be described by: D/sub Co/sup */ = 3.7 x 10/sup -7/ exp(-(135 +- 14) kJ mole/sup -1//RT) m/sup 2//sec and D/sub Ni//sup */ = 1.7 x 10/sup -7/ exp(-(140 +- 9) kJ mole/sup -1//RT) m/sup 2//sec. The values of D/sub Ni//sup */ are in reasonable agreement with those measured by the Rutherford backscattering technique. The measured diffusivities were independent of… more
Date: January 1, 1987
Creator: Hoshino, K.; Averback, R. S.; Hahn, H. & Rothman, S. J.
Partner: UNT Libraries Government Documents Department
open access

The role of high-energy synchrotron radiation in biomedical trace element research

Description: This paper will present the results of an investigation of the distribution of essential elements in the normal hepatic lobule. the liver is the organ responsible for metabolism and storage of most trace elements. Although parenchymal hepatocytes are rather uniform histologically, morphometry, histochemistry, immunohistochemistry, and microdissection with microchemical investigations have revealed marked heterogeneity on a functional and biochemical level. Hepatocytes from the periportal and pe… more
Date: January 1, 1987
Creator: Pounds, J. G.; Long, G. J.; Kwiatek, W. M.; Jones, K. W.; Gordon, B. M. & Hanson, A. L.
Partner: UNT Libraries Government Documents Department
open access

Human somatic, germinal and heritable mutagenicity

Description: This report deals with the general process of variant formation rather than with the consequences of a specific variant being present. It focusses on mutational mechanisms, mutagens, and the method for detecting de novo mutants and estimating mutation rate. It is to human genetics much like disease causation and prevention medicine are to medicine as a whole. The word ''mutagenicity'' is used in the title and throughout the text to connote the causation of all classes of genetic damage. Mutagen… more
Date: May 1, 1987
Creator: Mendelsohn, M.L.
Partner: UNT Libraries Government Documents Department
open access

Applications of pulsed neutron powder diffraction to actinide elements. [Pu-Al]

Description: We have been using the technique of pulsed neutron powder diffraction to study several problems in the physics and chemistry of the actinide elements. In these elements one often encounters very complex structures resulting from polymorphic transformations presumably induced by the presence of 5f-electrons. For example, at least five distinct structures of plutonium metal are found between room temperature and its melting point of 640/sup 0/C, and two of the structures are monoclinc. The determ… more
Date: November 1, 1987
Creator: Lawson, A. C.; Richardson, J. W.; Mueller, M. H.; Lander, G. H.; Goldstone, J. A.; Williams, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of postulated LOF (loss-of-flow) events in PRISM and SAFR

Description: The PRISM and SAFR designs, as currently proposed by DOE, are designed for ''inherent'', as opposed to ''engineered'', safety. Brookhaven National Laboratory is supporting the initial NRC review of these advanced LMR concepts. A loss-of-flow (LOF) accident coupled with a failure of the reactor shutdown system is one of the major safety concerns in the advanced liquid metal reactor (LMR) evaluation effort. The analysis discussed here covers: (1) primary pipe break without pump trip, (2) primary … more
Date: January 1, 1987
Creator: Chan, B. C.; Van Tuyle, G. J.; Slovik, G. C. & Aronson, A. L.
Partner: UNT Libraries Government Documents Department
open access

Search for tau decays to the eta meson

Description: Using a sample of 530,000 tau leptons collected by the Crystal Ball experiment at the e/sup +/e/sup -/ storage ring DORIS II, we have searched for tau decays to the eta meson. No eta signal is found in the inclusive analysis, tau ..-->.. eta X, of 1-prong decays, leading to the upper limits, BR(tau/sup -/ ..-->.. nu ..pi../sup -/eta) <0.3%, BR(tau/sup -/ ..-->.. ..pi../sup -/..pi../sup 0/eta) <0.9%, BR(tau/sup -/ ..-->.. nu ..pi../sup -/..pi../sup 0/..pi../sup 0/eta) <3.1%, BR(tau/sup -/ ..-->.… more
Date: December 1, 1987
Creator: Skwarnicki, T.
Partner: UNT Libraries Government Documents Department
open access

Induction linac drivers for commercial heavy-ion beam fusion

Description: This paper discusses induction linac drivers necessary to accelerate heavy ions at inertial fusion targets. Topics discussed are: driver configurations, the current-amplifying induction linac, high current beam behavior and emittance growth, new considerations for driver design, the heavy ion fusion systems study, and future studies. 13 refs., 6 figs., 1 tab. (LSP)
Date: November 1, 1987
Creator: Keefe, D.
Partner: UNT Libraries Government Documents Department
open access

Interparticle interactions and polarization effects in colloids

Description: The physics of simple colloidal systems is usually dominated by three independent length scales: the particle size, the average interparticle distance, and the range of the interparticle potential. The dispersed particles typically have characteristic dimensions in the range 5 to 100 nm, often with spherical or cylindrical symmetry. Dispersion densities vary over volume fractions ranging from 0.5 to 10/sup -4/, with the corresponding mean interparticle distances ranging from about 1 to 10 diame… more
Date: January 1, 1987
Creator: Hayter, J. B.
Partner: UNT Libraries Government Documents Department
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1987 Oak Ridge model conference: Proceedings: Volume I, Part 2, Waste Management

Description: A conference sponsored by the United States Department of Energy (DOE) was held on Waste Mangement. Topics discussed were waste stabilization technologies regulations and standards, innovative treatment technology, waste stabilization projects. Individual projects are processed separately for the data bases. (CBS)
Date: January 1, 1987
Partner: UNT Libraries Government Documents Department
open access

Neutral transverse momentum spectra in 200 A GeV O + nucleus reactions

Description: This paper discusses the experimental arrangement and detection system being used to study the neutral transverse momentum spectra of 200 GeV oxygen 16 reactions with carbon, copper and gold targets. Some preliminary results are given. 12 refs., 3 figs.
Date: January 1, 1987
Creator: Loehner, H.; Albrecht, R.; Awes, T.C.; Baktash, C.; Bechmann, P.; Berger, F. et al.
Partner: UNT Libraries Government Documents Department
open access

Detection of polyaromatic compounds using antibody-based fiberoptics fluoroimmunosensors

Description: In this work we have investigated the performance of an antibody-based fiberoptics sensor for the detection of the carcinogen benzo(a)pyrene and its DNA-adduct product BP-tetrol. The excellent sensitivity of this device - femtomole limits of detection for BP - illustrates that it has considerable potential to perform analyses of chemical and biological samples at trace levels in complex matrices. The results indicate that fiberoptics-based fluoroimmunosensors can be useful in a wide spectrum of… more
Date: January 1, 1987
Creator: Vo-Dinh, T.; Tromberg, B. J.; Griffin, G. D.; Ambrose, K. R.; Sepaniak, M. J. & Alarie, J. P.
Partner: UNT Libraries Government Documents Department
open access

Development of a free-electron laser user facility for the extreme ultraviolet

Description: A free-electron laser user facility for scientific experimentation in the extreme ultraviolet is being developed at Los Alamos. A series of laser oscillators and amplifiers, driven by a single, rf linear accelerator, will generate broadly tunable, picosecond-pulse, coherent radiation from 1 nm to 400 nm. The design and output parameters of this facility are described, comparison with synchrotron radiation sources is made, and recent progress in developing the three primary components (electron … more
Date: January 1, 1987
Creator: Newnam, B.E.
Partner: UNT Libraries Government Documents Department
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