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Determination of the Occurrence of Gold in an Unoxidized Carlin-Type Ore Sample Using Synchrotron Radiation

Description: The occurrence of the so-called invisible gold in two unoxidized Carlin-type gold samples from Nevada have been determined using synchrotron x-ray fluorescence (SXRF) analysis at the National Sychrotron Light Source, Brookhaven National Laboratory. The samples were a bedded sample from the east ore zone of the Carlin deposit and a breccia sample from Horse Canyon. Preliminary results show that gold is found only in the Horse Canyon breccia sample. Experimental details including other x-ray line… more
Date: January 1, 1986
Creator: Chen, J. R.; Chao, E. C. T.; Minkin, J. A.; Back, J. M.; Bagby, W. C.; Rivers, M. L. et al.
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Partner: UNT Libraries Government Documents Department
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Possible Indication of an a-Dependence of R in Deep-Inelastic Electron Scattering From Nuclei

Description: Measurements of R for deuterium, He, Al, Fe and Au were made at Q/sup 2/ = 5 (GeV/c)/sup 2/ and x = 0.3, 0.5 and 0.7. An indication of a possible A-dependence of R has been found which would result in large differences among sigma/sup A//sigma/sup d/, F/sub 2//sup A//F/sub 2//sup d/ and F/sub 1//sup A//F/sub 1//sup d/. 7 references, 4 figures.
Date: January 1, 1985
Creator: Gomez, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The classical EMC effect from few-body systems to nuclear matter: Can binding effects explain it

Description: It is shown that if the effects of nucleon binding on deep inelastic scattering are considered within many-body realistic descriptions of nuclei which include nucleon-nucleon correlations, the EMC effect in light and medium weight nuclei and nuclear matter can be accounted for in the region 0.2 {le} x {le} 0.5, but a systematic discrepancy between theory and experiment remains to be explained for 0.5 {le} x {le} 0.9.
Date: May 14, 1991
Creator: Ciofi degli Atti, C. & Liuti, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Emittances and Brightnesses of High-Intensity Negative Ion Sources

Description: The emittances of high-intensity ion beams extracted from cesium sputter negative ion sources equipped with cylindrical and ellipsoidal solid tungsten and spiral-wound tantalum (General Ionex Corporation, Model 860), and cesium surface ionizers have been measured for several ion species, including /sup 12/C/sup -/, /sup 28/Si/sup -/, /sup 58/Ni/sup -/, and /sup 197/Au/sup -/. While certain sets of data from the ellipsoidal and cylindrical geometry ionizer sources suggest a moderate growth in em… more
Date: January 1, 1987
Creator: Alton, G. D. & McConnell, J. W.
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Partner: UNT Libraries Government Documents Department
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Emittance growth, tune shift, and the bunched-beam, bunched-beam interaction

Description: While it is understood that the main limitation of beam lifetime in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven is the emittance growth due to intra-beam scattering, it is important to evaluate and understand both the emittance growth and nature of the tune shift due to multiple beam-beam crossings of the bunched-beams of heavy ions. We note within RHIC, fully stripped /sup 197/Au ions (charge 79e/sup +/) will survive up to ten hours in the collider, with six beam crossings per rev… more
Date: January 1, 1989
Creator: Rhoades-Brown, M.J. & Tepikian, S.
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Partner: UNT Libraries Government Documents Department
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The heavy ion injection scheme for RHIC (Relativistic Heavy Ion Collider)

Description: The Relativistic Heavy Ion Collider (RHIC) at Brookhaven has a multi-component injection system. The Collider requires very heavy ions such as /sub 79//sup 197/Au to be injected fully stripped of atomic electrons, at a kinetic energy of approximately 10 GeV/nucleon. However, the heavy ions are produced initially at a negative ion source and accelerated first in a 15 MV Tandem. These partially stripped ions have a kinetic energy of approximately 1 MeV/nucleon on leaving the Tandem. In order to a… more
Date: January 1, 1989
Creator: Rhoades-Brown, M.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The data base of the standards and related cross sections after ENDF/B-VI

Description: A brief description is given of the procedure used in the global evaluation of the standards and other important cross sections for ENDF/B-VI. The results of the evaluation are compared with new or revised experimental data.
Date: January 1, 1992
Creator: Poenitz, W.P. (Argonne National Lab., IL (United States)) & Carlson, A.D. (National Inst. of Standards and Technology, Washington, DC (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The classical EMC effect from few-body systems to nuclear matter: Can binding effects explain it?

Description: It is shown that if the effects of nucleon binding on deep inelastic scattering are considered within many-body realistic descriptions of nuclei which include nucleon-nucleon correlations, the EMC effect in light and medium weight nuclei and nuclear matter can be accounted for in the region 0.2 {le} x {le} 0.5, but a systematic discrepancy between theory and experiment remains to be explained for 0.5 {le} x {le} 0.9.
Date: May 14, 1991
Creator: Ciofi degli Atti, C. & Liuti, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Volume-corrected isomer shifts on transition metal atoms: charge flow and electronegativity scales in alloys

Description: It is shown that once volume effects are suitably accounted for, the isomer shifts of /sup 57/Fe, /sup 99/Ru, /sup 181/Ta, /sup 193/Ir, /sup 195/Pt, and /sup 197/Au display common behavior. 9 references. (JFP)
Date: January 1, 1977
Creator: Watson, R. E. & Bennett, L. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Resonance Integrals and Self-Shielding Factors for Detector Foils

Description: >Effective activation resonance integrals for thin and thick foils in an isotropic neutron flux were measured by a cadmium ratio method. Gold was used as a standard. Values obtained for dilute resonance integrals in barns, not including 1/v capture, were: Au/sup 197/, 1390 plus or minus 40 (Reference); U/ sup 238/ capture, 280 plus or minus 10; Cu/sup 63/, 3.17 plus or minus 0.18; Cu/sup 65/, 1.39 plus or minus 0.22; Mo/sup 98/, 9.9 plus or minus 1.1; Mo/sup 100/, 4.06 plus or minus 0.23; W/… more
Date: January 1, 1963
Creator: Baumann, N. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis Of Activation Measurements Of Th$sup 232$ Resonance Captures In The Peach Bottom (40-MW(E) Prototype HTGR) Critical Assembly

Description: Measurements of thorium resonance-capture activations relative to those of Au/sup 197/, which were made in the Peach Bottom (HTGR) critical assembly, are analyzed and compared with thorium resonance activations calculated from tabulated values of the resonance parameters. The new vanadium-subtraction method that was applied is shown to measure thorium resonance captures relative to those of Au/sup 197/ to within several per cent in this geometry. The measurements show that the lowest several re… more
Date: September 14, 1962
Creator: Sampson, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical Engineering Division fast-neutron dosimetry annual report, July 1975--June 1976

Description: One of the objectives of the Dosimetry and Damage Analysis Center is to provide standardized dosimetry technology for materials-study programs within the ERDA Division of Magnetic Fusion Energy. Current efforts have included characterization of neutron environments in terms of fluence and spectral distribution for materials experiments conducted at the Lawrence Livermore Laboratory's (LLL) Rotating Target Neutron Source and at the LLL-Davis Cyclograaff. Environment characterization efforts… more
Date: January 1, 1976
Creator: Heinrich, R R; Greenwood, L R; Kennerley, R J; Chellew, N R; Popek, R J; Malewicki, R L et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ENDF/B dosimetry file for version V

Description: Version V of the ENDF/B dosimetry tape will include updates to the majority of isotopes in the file. Work done toward this end at Brookhaven National Laboratory is reported. (GHT)
Date: January 1, 1976
Creator: Magurno, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heavy Residue Spectra in the Interaction of 85 A MeV 12C with197Au

Description: We have measured the heavy residue differential range distributions in the interaction of 85 MeV/nucleon {sup 12}C with {sup 197}Au. The range distributions were converted to energy spectra using known range-energy relationships. The mean residue energies range from 15 keV/nucleon (A = 189) to 314 keV/nucleon (A = 131). Longitudinal momenta of the heavy residues have been deduced (<p{sub {parallel}} > /p{sub cn} = 0.27). The mean spectral energies and the shapes of the residue spectra are… more
Date: December 1, 1988
Creator: Aleklett, K.; Johansson, M.; Lihver, L.; Loveland, W.; Groening, H.; McGaughey, P. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron Transfer Processes in Collisions of Highly Charged Energetic (0.1 to 1.0 MeV/nucleon) Ions with Helium Atoms

Description: We have investigated charge transfer in collisions of energetic (0.1 - 1 MeV/nucleon) highly charged ions with helium atoms with the principal aim clarifying the nature of two-electron processes. The sensitivity of partial charge-changing cross sections (i.e., single- and double-charge transfer, transfer ionization (TI), and single and double ionization) to core configuration and scaling rules for one- and two-electron processes were investigated with iodine ions (q = 5+ ..-->.. 26+) and uraniu… more
Date: January 1, 1987
Creator: Datz, S.; Hippler, R.; Andersen, L. H.; Dittner, P. F.; Knudsen, H.; Krause, H. F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Study of heavy element structure with in-beam. cap alpha. /sup -/,. beta. /sup -/ and. gamma. -ray spectroscopy

Description: We describe our in-beam superconducting conversion electron spectrometer and its use in a (t,p) proton-conversion electron coincidence mode. Several examples of completed and on-going investigations are presented. These include: E0 strength from the /sup 238/U fission isomer; electromagnetic properties of the J/sup ..pi../ = 6/sup +/ and 8/sup +/ states of /sup 210/Pb; single particle and cluster states of /sup 213/Fr; the J/sup ..pi../ = 21/2/sup +/ isomer in /sup 197/Au and /sup 199/Au; and t… more
Date: May 10, 1984
Creator: Meyer, R. A.; Decman, D. J.; Henry, E. A.; Hoff, R. W.; Mann, L. G.; Struble, G. L. et al.
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Partner: UNT Libraries Government Documents Department
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The liquid to vapor phase transition in excited nuclei

Description: For many years it has been speculated that excited nuclei would undergo a liquid to vapor phase transition. For even longer, it has been known that clusterization in a vapor carries direct information on the liquid-vapor equilibrium according to Fisher's droplet model. Now the thermal component of the 8 GeV/c pion + 197 Au multifragmentation data of the ISiS Collaboration is shown to follow the scaling predicted by Fisher's model, thus providing the strongest evidence yet of the liquid to vapor… more
Date: May 8, 2001
Creator: Elliott, J. B.; Moretto, L. G.; Phair, L.; Wozniak, G. J.; Beaulieu, L.; Breuer, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron cooling for RHIC

Description: Electron cooling of completely stripped gold ions {sup 197}Au{sup 79+} in RHIC is considered for the store energy, {gamma} = 108. The optimal parameters of the required electron storage ring are discussed and proposed. The cooling time is calculated as 15 minutes, which would allow not only to avoid the beam loss due to the intra-beam scattering, but also reduce the transverse emittance and increase the luminosity several times.
Date: September 25, 1998
Creator: Burov, A., FNAL,
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A method for neutron dosimetry in ultrahigh flux environments

Description: A method for neutron dosimetry in ultrahigh flux environments is developed, and devices embodying it are proposed and simulated using a Monte Carlo code. The new approach no longer assumes a linear relationship between the fluence and the activity of the nuclides formed by irradiation. It accounts for depletion of the original ``foil`` material and for decay and depletion of the formed nuclides. In facilities where very high fluences are possible, the fluences inferred by activity measurements … more
Date: October 1, 1996
Creator: Ougouag, A. M.; Wemple, C. A. & Rogers, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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