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Nuclide migration from areal sources into a fracture

Description: This document shows analytic solutions to the problem of hydrogeologic transport of radionuclides released from finite areal sources into a planar fracture. It illustrates the solutions through numerical and graphical displays of the spatial and temporal distribution of the radionuclides as a result of advection in the fracture, transverse dispersion and surface sorption, as well as diffusion into and sorption in the rock matrix. The numerical illustrations indicate that sufficient distances aw… more
Date: April 1, 1987
Creator: Ahn, J.; Chambre, P. L.; Pigford, T. H. & Lee, W. W. L.
Partner: UNT Libraries Government Documents Department
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Semi-inclusive inelastic electron scattering from nuclei

Description: A survey is presented of the physics of the electroproduction of hadrons from nuclear targets, eA ..-->.. e'hX. Variables and structure functions are specified. The parton model description of electroproduction is summarized; fragmentation functions are defined and their properties are listed. Specific measurements are suggested. Predictions of the pion exchange model are presented for the nuclear dependence of eA ..-->.. e'hX, including a discussion of the special subprocess e..pi.. ..-->.. e'… more
Date: April 30, 1987
Creator: Berger, E. L.
Partner: UNT Libraries Government Documents Department
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Status of the Berkeley small cyclotron AMS (accelerator mass spectrometry) project

Description: A small, low-energy cyclotron has been designed and built at Berkeley for direct detection dating of /sup 14/C. The system combines the use of a negative ion source to reject /sup 14/N with the high resolution of a cyclotron to reject other background ions. In order to allow the dating of old and small samples, the present system incorporates a high-current external ion source and injection beamline. The system is expected to be operational by mid-1987.
Date: April 1, 1987
Creator: Bertsche, K. J.; Friedman, P. G.; Morris, D. E.; Muller, R. A. & Welch, J. J.
Partner: UNT Libraries Government Documents Department
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Search for CP violation in B/sup 0/ (and D/sup 0/) decays II: A closer look

Description: Recent findings from UA1 and ARGUS on B/sup 0/ - anti B/sup 0/ mixing brighten considerably the prospects of findings CP violation in B/sup 0/ decays. We sketch some semi-quantitative scenarios where we also address technical issues like the amount of time that is necessary. We point out that searching for the reaction UPSILON(4s) ..-->.. B/sup 0/ anti B/sup 0/ ..-->.. f/sub 1/, f/sub 2/, (where f/sub x/ = line integral), where f/sub 1/, f/sub 2/ are CP eigenstates of the same CP parity has a g… more
Date: April 1, 1987
Creator: Bigi, I. I.
Partner: UNT Libraries Government Documents Department
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Mathematical models for predicting tritium transport in lithium ceramics

Description: Tritium retention and release data for lithium ceramics (Li/sub 2/O, LiAlO/sub 2/, and Li/sub 4/SiO/sub 4/) are available from in-reactor and post-irradiation anneal tests on single crystals, powders, and sintered products. With the exception of the single-crystal tests in which bulk diffusion is the rate-limiting release mechanism, it is very difficult to interpret the results of these tests and extrapolate the results to design conditions for a fusion solid-breeder blanket. Mathematical model… more
Date: April 1, 1987
Creator: Billone, M.C.
Partner: UNT Libraries Government Documents Department
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Discussion of possible content of an IAEA (International Atomic Energy Agency) handbook/computer file for ''Data for Medical Radioisotope Production''

Description: Several possible approaches will be put forward in order to stimulate discussion and seek consensus on the relative emphasis and format of a proposed IAEA handbook and computer file for ''Data for Medical Radioisotope Production.'' An outline for possible chapters for non-nuclear physicists will be presented describing low, medium, and high energy reactions induced by light projectiles (e.g., n,p,..cap alpha..), by photons, and by heavy ions. Qualitative features would be described, typical exp… more
Date: April 1, 1987
Creator: Blann, M.
Partner: UNT Libraries Government Documents Department
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Iron and iron derived radicals

Description: We have discussed some reactions of iron and iron-derived oxygen radicals that may be important in the production or treatment of tissue injury. Our conclusions challenge, to some extent, the usual lines of thought in this field of research. Insofar as they are born out by subsequent developments, the lessons they teach are two: Think fastexclamation Think smallexclamation In other words, think of the many fast reactions that can rapidly alter the production and fate of highly reactive intermed… more
Date: April 1, 1987
Creator: Borg, D.C. & Schaich, K.M.
Partner: UNT Libraries Government Documents Department
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The nature of beamstrahlung

Description: The physical nature of beamstrahlung during beam-beam interaction in linear colliders is reviewed. We first make the distinction between a dense beam and a dilute beam. We then review the characteristics of synchrotron radiation (SR) and bremsstrahlung, and argue that for a wide range of beam parameters beamstrahlung is SR in nature, even if the beam is dilute. Some issues concerning the specific conditions in beamstrahlung as SR are then discussed. Finally we suggest that in order to suppress … more
Date: April 1, 1987
Creator: Chen, P.
Partner: UNT Libraries Government Documents Department
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Smoke clearing by high energy laser beams

Description: We describe the clearing phenomenon that occurs when a continuous wave (CW) high energy laser beam, incident upon a cloud of hygroscopic droplets, vaporizes these droplets. We consider the case when the incident wavelength is greater than the average droplet radius. Williams' model is used to describe the vaporization of a single droplet. The propagation of the laser beam is described by the radiative transfer equation in a slab geometry. The radiative transfer equation is solved using the meth… more
Date: April 10, 1987
Creator: Chitanvis, S.M.; Gerstl, S.A.W. & Zardecki, A.
Partner: UNT Libraries Government Documents Department
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The evolution of HOBO

Description: HOBO is a free-Lagrangian hydrodynamics code which has been under development at Los Alamos for several years. It was based on free-Lagrangian tracer points and finite difference approximations to the equations of motion for fluid flow. This method will be reviewed briefly here. The use of an independent time step at each point is also described. This technique increases the speed of the code by factors of 10 to 20. How the code has been modified to achieve energy and momentum conservation and … more
Date: April 1, 1987
Creator: Clark, R. A.
Partner: UNT Libraries Government Documents Department
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Reflections on the criticality of special actinide elements

Description: During recent years, the list of nuclides known to be capable of supporting a chain reaction has substantially increased. Since the criticality aspects for some of these nuclides differ in important respects from those of the most common fissile nuclides, /sup 235//sub 92/U, and /sup 239//sub 94/Pu, a new term, ''fissible'' was recently proposed in nuclear engineering to help distinguish differences. Activation energies for fission have been calculated for 41 of the actinide isotopes which are … more
Date: April 1, 1987
Creator: Clayton, E. D.
Partner: UNT Libraries Government Documents Department
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Skyshine from the SSC (superconducting super collider) interaction regions

Description: This report calculates the neutron fluence from collisions at the superconducting super collider. The motivation for these calculations is shielding considerations in the collision halls of the collider. (JDH)
Date: April 1987
Creator: Cossairt, J. D.
Partner: UNT Libraries Government Documents Department
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Checking the numbers for the labyrinths shown in the SSC (Superconducting Super Collider) conceptual design

Description: Reviewed are the designs for access labyrinths presently shown in the Conceptual Design Report to see if they are reasonable for radiation protection purposes. This matter was previously studied two years ago in a Fermilab TM (Co85a). The methods used are based upon scaling the results of calculations done by Gollon and Awschalom. Confidence in the results has been fortified by a successful experimental test. The Conceptual Design Report shows two types of access labyrinths which are significan… more
Date: April 1, 1987
Creator: Cossairt, J.D.
Partner: UNT Libraries Government Documents Department
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Review of the abort dump shown in the SSC (superconducting super collider) conceptual design report

Description: This report details the design of the abort dump for the Superconducting Super-Collider (SSC). The dump is made from graphite and designed to absorb the maximum beam energy of 400 MJ. The report considers long time activation effects of the dump components. The report concludes that the basic design of the abort dump is well defined. (JDH)
Date: April 1, 1987
Creator: Cossairt, J.D.
Partner: UNT Libraries Government Documents Department
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Unorthodox method of calculating the activation of groundwater by routine SSC (Superconducting Super Collider) operations

Description: A novel method for estimating the groundwater activation in the environs of the SSC collider ring tunnel is developed. This method, based on the Moyer model, may provide a simpler approach to such estimates and also a check for existing methods. One such method is compared. (LSP)
Date: April 1, 1987
Creator: Cossairt, J.D.
Partner: UNT Libraries Government Documents Department
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Measurement of the Intensity of the Cosmic Background Radiation at3.7 GHz

Description: We measured the temperature of the cosmic background radiation (CBR) at a frequency of 3.7 GHz (8.1 cm wavelength), using a total power, direct RF-gain receiver. The results give a brightness temperature, T{sub CBR}, of 2.58 {+-} 0.13 K (68% C.L.). Details of the instrument and of the experimental procedure are given. This measurement is part of a larger experiment to measure the spectrum of the Cosmic Background Radiation between 0.6 and 90 GHz (50 and 0.33 cm wavelength).
Date: April 1, 1987
Creator: De Amici, G.; Smoot, G. F.; Aymon, J.; Bersanelli, M.; Kogut, A.; Levine, S. M. et al.
Partner: UNT Libraries Government Documents Department
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Radiation safety systems at the NSLS

Description: This report describes design principles that were used to establish the radiation safety systems at the National Synchrotron Light Source. The author described existing safety systems and the history of partial system failures. 1 fig. (TEM)
Date: April 1, 1987
Creator: Dickinson, T.
Partner: UNT Libraries Government Documents Department
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Experimental tests of quantum chromodynamics

Description: Experimental tests of quantum chromodynamics are discussed in the e/sup +/e/sup -/ continuum, in pp and anti p p collisions, in measurements of ..cap alpha../sub s/ from UPSILON decays, in deep inelastic lepton scattering, and in the measurement of the photon structure function. A large body of data relating to the testing of quantum chromodynamics is reviewed, showing qualitative agreement between the data from a wide range of processes and QCD. 66 refs., 79 figs. (LEW)
Date: April 1, 1987
Creator: Dorfan, J.
Partner: UNT Libraries Government Documents Department
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Geothermal technology development at Sandia

Description: Geothermal technology development at Sandia consists of work in two major project areas - Hard Rock Penetration and Magma Energy Extraction. The Hard Rock Penetration Program is directed at reducing drilling costs for geothermal wells. Current activities are focused in three areas: borehole mechanics, rock penetration mechanics, and industry cost-shared research. The Magma Energy Extraction Program is investigating the engineering feasibility of utilizing crustal magma bodies as a source of ene… more
Date: April 1, 1987
Creator: Dunn, J.C.
Partner: UNT Libraries Government Documents Department
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Optical properties of tetravalent uranium in the solid state

Description: The optical spectra are fit to the parameters of a phenomenological Hamiltonian from which a calculated spectrum is obtained. The goodness of fit is determined by the value of sigma (cm/sup -1/), the rms deviation. The sigma and crystal field are tabulated for U/sup 4 +/ in various host crystals, Pr/sup 3 +/ or Nd/sup 3 +/ in various crystals, and the free ion U/sup 4 +/. The rms deviation sigma for the U/sup 4 +/ compounds is much worse on the average than for the Pr/Nd examples. There appears… more
Date: April 1, 1987
Creator: Edelstein, N.
Partner: UNT Libraries Government Documents Department
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Stress control of seismicity patterns observed during hydraulic fracturing experiments at the Fenton Hill hot dry rock geothermal energy site, New Mexico

Description: Seismicity accompanying hydraulic injections into granitic rock is often diffuse rather than falling along a single plane. This diffuse zone of seismicity cannot be attributed to systematic errors in locations of the events. It has often been asserted that seismicity occurs along preexisting joints in the rock that are favorably aligned with the stress field so that slip can occur along them when effective stress is reduced by increasing pore fluid pressure. A new scheme for determining orienta… more
Date: April 13, 1987
Creator: Fehler, M. C.
Partner: UNT Libraries Government Documents Department
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Specific heat of (U/sub 0. 97/Th/sub 0. 03/)Be/sub 13/ under pressure

Description: The specific heat, C, of (U/sub 0.97/Th/sub 0.03/)Be/sub 13/ has been measured for 0.1 less than or equal to T less than or equal to 1K and 1.6 less than or equal to P less than or equal to 7.7 kbar, and for 0.1 less than or equal to T less than or equal to 20K with P = 0. For T > 8K both the pure and Th substituted samples have essentially the same C. The peaks in C/T at 0.33 and 0.54 for P = 0 are suppressed and shifted to lower T by pressure. Anomalies in C/T can be correlated to correspondi… more
Date: April 1, 1987
Creator: Fisher, R. A.; Lacy, S. E.; Marcenat, C.; Olsen, J. A.; Phillips, N. E.; Fisk, Z. et al.
Partner: UNT Libraries Government Documents Department
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Radon in groundwater of the Long Valley Caldera, California

Description: In the Long Valley caldera, an area of recently (approx.550 y) active volcanism and current seismic activity, /sup 222/Rn concentrations in hot, warm, and cold spring waters have been measured since 1982. Rn contents of the waters correlate inversely with temperature and specific conductance, with high concentrations (1500 to 2500 pCi/l) occurring in dilute cold springs on the margins of the caldera, and low concentrations (12 to 25 pCi/l) in hot to boiling springs. Rn correlates only slightly … more
Date: April 1, 1987
Creator: Flexser, S.; Wollenberg, H. A. & Smith, A. R.
Partner: UNT Libraries Government Documents Department
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Congruent reduction and mode conversion in 4-dimensional plasmas

Description: Standard eikonal theory reduces, to N=1, the order of the system of equations underlying wave propagation in inhomogeneous plasmas. The condition for this remarkable reducibility is that only one eigenvalue of the unreduced NxN dispersion matrix D(k,x) vanishes at a time. If, however, two or more eigenvalues of D become simultaneously small, the geometric optics reduction scheme becomes singular. These regions are associated with linear mode conversion, and are described by higher order systems… more
Date: April 1, 1987
Creator: Friedland, L. & Kaufman, A. N.
Partner: UNT Libraries Government Documents Department
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