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Fieldable computer system for determining gamma-ray pulse-height distributions, flux spectra, and dose rates from Little Boy

Description: Our system consists of a LeCroy 3500 data acquisition system with a built-in CAMAC crate and eight bismuth-germanate detectors 7.62 cm in diameter and 7.62 cm long. Gamma-ray pulse-height distributions are acquired simultaneously for up to eight positions. The system was very carefully calibrated and characterized from 0.1 to 8.3 MeV using gamma-ray spectra from a variety of radioactive sources. By fitting the pulse-height distributions from the sources with a function containing 17 parameters,… more
Date: January 1, 1984
Creator: Moss, C. E.; Lucas, M. C.; Tisinger, E. W. & Hamm, M. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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BGO in several satellite-borne applications. [Bismuth germanate scintillator]

Description: An experiment is being prepared to be flown on a NASA/NOAA TIROS satellite. Named DOEE-1 (Department of Energy Experiment), it will carry a segmented 2.7'' x 3'' BGO (Bismuth Germanate) scintillator. Sufficient telemetry will be provided to evaluate the performance exhaustively during a long exposure in space. Another instrument including a BGO scintillator, named SEE (Spectrometer for Energetic Electrons), has been operating at synchronous altitude since 1979, providing measurements of electro… more
Date: January 1, 1982
Creator: Klebesadel, R.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Kinetics of formation of the A-15 phase in the Nb--Al--Ge system

Description: A study has been made of the time and temperature dependence of the growth of the A-15 phase and its grains in the Nb-Al-Ge system. In addition, changes in the microstructure and composition of the A-15 phase have been studied using an EDAX analysis. The data obtained have been plotted and compared with theory. The results have been used to explain the variations in the superconducting properties of this system as observed in earlier work. Consequently, areas for further study towards optimizin… more
Date: May 1, 1977
Creator: Kannatey-Asibu, E. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lasers for isotope separation. Progress report, January 1, 1976--September 30, 1976

Description: The proposed research associated with this contract is divided roughly into three parts: first, the study of Raman spin-flip devices and associated semiconductor physics; second, the free-electron laser; and finally, work related to specific isotope-separation processes. The hot-electron properties of InSb irradiated by 10.6 ..mu..M CO/sub 2/ laser radiation and the anomalous transmission of the InSb device have been analyzed. In related work hot-electron effects were studied both in Ge and in … more
Date: September 1976
Creator: Scully, Marian O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Amorphous germanium as an electron or hole blocking contact on high-purity germanium detectors

Description: Experiments were performed in an attempt to make thin n/sup +/ contacts on high-purity germanium by the solid phase/sup 1)/ epitaxial regrowth of arsenic doped amorphous germanium. After cleaning the crystal surface with argon sputtering and trying many combinations of layers, it was not found possible to induce recrystallization below 400/sup 0/C. However, it was found that simple thermally evaporated amorphous Ge made fairly good electron or hole blocking contacts. Excellent spectrometers hav… more
Date: October 1, 1976
Creator: Hansen, William L. & Haller, Eugene E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CHEMICAL TECHNOLOGY DIVISION, CHEMICAL DEVELOPMENT SECTION C, PROGRESS REPORT ON SEPARATIONS CHEMISTRY AND SEPARATIONS PROGRESS RESEARCH FOR JANUARY-JUNE 1963

Description: Cesium Recovery from Ores. Adaptation of the phenol extraction (Phenex) process to the recovery of cesium from ore leach liquors continued to show promise. In roast-leach tests, 98 to 99% of the cesium was dissolved from pollucite ore by roasting the ore at 800 deg C with 1.8 parts of Na/sub 2/CO/sub 3/ plus 1.2 parts of NaCl and leaching with water. More than 99% of the cesium was recovered from the leach liquor and separated from other alkali metals by extracting with 4-sec-butyl-2-( alpha -m… more
Date: October 25, 1963
Creator: Brown, K.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-energy neutron irradiation of superconducting compounds

Description: The effect of high-energy neutron irradiation (E greater than 1 MeV) at ambient reactor temperatures on the superconducting properties of a variety of superconducting compounds is reported. The materials studied include the A-15 compounds Nb$sub 3$Sn, Nb$sub 3$Al, Nb$sub 3$Ga, Nb$sub 3$Ge and V$sub 3$Si, the C-15 Laves phase HfV$sub 2$, the ternary molybdenum sulfide Mo$sub 3$Pb$sub 0$.$sub 5$S$sub 4$ and the layered dichalcogenide NbSe$sub 2$. The superconducting transition temperature has bee… more
Date: January 1, 1975
Creator: Sweedler, A.R.; Snead, C.L.; Newkirk, L.; Valencia, F.; Geballe, T.H.; Schwall, R.H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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METALLURGY DIVISION SEMIANNUAL PROGRESS REPORT FOR PERIOD ENDING APRIL 10, 1954

Description: Transformation kinetics studies were started on Ag - Zr alloys. Tensile properties of Th alloys with additions of 2 and 4% Ti and varving C content were determined. The production of U - Al alloys by reduction of UO/sub 2/F/sub 2/ in a cryolite slag was demonstrated. Dynamic corrosion experiments including impact tests on commercial-purity titanium samples exposed to oxygen-preseurized UO/sub 2/SO/sub 4/ periods in excess of 500 hr indicated that no change in impact behavior occurred. Similar t… more
Date: August 1, 1954
Creator: Bridges, W.H. ed.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid-helium scintillation detection with germanium photodiodes

Description: Special high-purity germanium photodiodes have been developed for the direct detection of vacuum ultraviolet scintillations in liquid helium. The photodiodes are immersed in the liquid helium, and scintillations are detected through one of the bare sides of the photodiodes. Test results with scintillation photons produced by 5.3-MeV ..cap alpha.. particles are presented. The use of these photodiodes as liquid-helium scintillation detectors may offer substantial improvements over the alternate d… more
Date: May 1, 1982
Creator: Luke, Paul N.; Haller, E. E. & Steiner, Herbert M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Feasibility studies for high pressure neutron powder diffraction experiments

Description: We recently performed two neutron powder diffraction experiments on very small samples on the High Intensity Powder Diffractometer (HIPD). These were done to determine the feasibility of performing in situ high pressure/high temperature neutron diffraction experiments on HIPD at pressures which would exceed the previous limit of {approximately}50 kbar achievable in a neutron diffraction experiment. The first experiment consisted of examining the product from a high pressure preparation done at … more
Date: January 1, 1990
Creator: Von Dreele, Robert B. & Parise, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scaling of Zirconium and Zirconium Alloys. Technical Progress Report No. 1

Description: Zirconium-base binary alloys were prepared using the elements Mo, Fe, Co, Cr, Ni. Cu, Ag, Ta, Nb, Bt. Pa, Os, Ir, Rh, Ru, V, Si, Mn, Sn, Pb, W, Sb, Ge, Al, Ti, Mg, Zn, La, and Ba. Also, Zr-base ternary alloys were prepared using the elements Cu, Ni, Nb, Ta, V, Sn, Sb, and W. The maximum total alloy content of the alloys was five per cent. The Zr used was low-Hf sponge,and the alloys were prepared-by arc melting in an Ar atmosphere. The alloys were tested for scaling resistance at the temperatur… more
Date: August 1, 1957
Creator: Burka, J. A.; Crouse, C. S. & Swift, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The GALLEX Project

Description: The GALLEX collaboration aims at the detection of solar neutrinos in a radiochemical experiment employing 30 tons of Gallium in form of concentrated aqueous Gallium-chloride solution. The detector is primarily sensitive to the otherwise inaccessible pp-neutrinos. Details of the experiment have been repeatedly described before. Here we report the present status of implementation in the Laboratori Nazionali del Gran Sasso (Italy). So far, 12.2 tons of Gallium are at hand. The present status of de… more
Date: January 1, 1989
Creator: Kirsten, T. (Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany, F.R.))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Semiclassical aspects of transfer reactions

Description: Semiclassical analysis of heavy ion induced transfer reactions are discussed for the quasielastic region. Some unique aspects of these reactions are shown, the variety of features which can be understood semiclassically is demonstrated, and some open problems are indicated. 28 refs., 16 figs. (LEW)
Date: January 1, 1985
Creator: Bond, P.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ion implantation of boron in germanium

Description: Ion implantation of /sup 11/B/sup +/ into room temperature Ge samples leads to a p-type layer prior to any post implant annealing steps. Variable temperature Hall measurements and deep level transient spectroscopy experiments indicate that room temperature implantation of /sup 11/B/sup +/ into Ge results in 100% of the boron ions being electrically active as shallow acceptor, over the entire dose range (5 x 10/sup 11//cm/sup 2/ to 1 x 10/sup 14//cm/sup 2/) and energy range (25 keV to 100 keV) i… more
Date: May 1, 1985
Creator: Jones, K. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Superconductivity and atomic ordering in neutron-irradiated Nb/sub 3/Ge

Description: The effects of high energy (E > 1 MeV) neutron irradiation on the properties of Nb/sub 3/Ge prepared by chemical vapor deposition have been studied. Irradiation to a fluence of 3.4 x 10/sup 19/ n/cm/sup 2/ produces a decrease in the superconducting transition temperature T/sub c/ from 20.9 to 4.4 K and in the long-range order parameter S from 0.86 to 0.46, and an increase in the lattice parameter a/sub 0/ from 5.142 A to 5.174 A. For a fluence of 6.5 x 10/sup 19/ n/cm/sup 2/, most of the Nb/sub… more
Date: January 1, 1979
Creator: Cox, D. E.; Sweedler, A. R.; Moehlecke, S.; Newkirk, L. R. & Valencia, F. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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