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in subjects: "Kev Range 100-1000"

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Fast-neutron total and scattering cross sections of elemental palladium

Neutron total cross sections of palladium are measured from approx. = 0.6 to 4.5 MeV with resolutions of approx. = 30 to 70 keV at intervals of less than or equal to 50 keV. Differential neutron elastic- and inelastic-scattering cross sections are measured from 1.4 to 3.85 MeV at intervals of 50 to 100 keV and at 10 to 20 scattering angles distributed between approx. = 20 and 160/sup 0/. The experimental results are compared with respective quantities given in ENDF/B-V and used to deduce an opt… more

Date: June 1, 1982

Creator: Smith, A. B.; Guenther, P. T. & Whalen, J. F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Modeling studies on the precipitation of Kr after implantation into metals

A rate-theory approach is applied to interpreting observations on the precipitation of Kr injected into Ni at temperatures between 25 and 560/degree/C. At temperatures of 400/degree/C or higher, the implanted Kr precipitates evolve into a bi-modal size distribution containing small solid precipitates and an additional population of larger, faceted bubbles. The calculations explore the dependence of the observed bi-modal distribution on the maximum size of the solid Kr precipitates and the effec… more

Date: February 1, 1988

Creator: Rest, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Dependence of secondary ion emission from organic material on the energy loss of the impacting heavy ion

Samples of the amino acid valine were irradiated by 2.5 MeV-Ar, 0.8 MeV-Kr and 1.0 MeV Xe beams from the Argonne Dynamitron accelerator in order to study the energy distributions of ejected secondary ions. For Kr and Xe the nuclear stopping power exceeded the electronic stopping power by a factor 2 or 3, respectively, but the functional shape of the energy distributions and the mean ejection energies (0.9--1.4 eV) indicated that the molecular ions (M{plus minus}H){sup {plus minus}} are desorbed… more

Date: January 1, 1991

Creator: Hunt, J.E. (Argonne National Lab., IL (United States)) & Wien, K. (Technische Hochschule Darmstadt (Germany). Inst. fuer Kernphysik)

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Linear Accelerator Project. Annual Technical Report, October 1, 1971-- September 30, 1972

No Description Available.

Date: December 31, 1972

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Hyper filter-fluorescer spectrometer for x rays above 120 keV

An apparatus utilizing filter-fluorescer combinations is provided to measure short bursts of high fluence x-rays above 120 keV energy, where there are no practical absorption edges available for conventional filter-fluorescer techniques. The absorption edge of the prefilter is chosen to be less than that of the fluorescer, i.e., E/sub PRF/ < E/sub F/, contrary to the prior art technique E/sub PRF/ > E/sub F/. In this way, the response function is virtually zero between E/sub PRF/ and E/sub F/ a… more

Date: July 7, 1981

Creator: Wang, C. L.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

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Surface damage of molybdenum and TZM alloy under D/sup +/ impact

The surface damage of polycrystalline molybdenum and TZM alloy under 40-, 60-, and 120-keV D/sup +/ impact has been investigated for irradiation in both pulsed and continuous mode for total doses varying from 1.7 x 10/sup 17/ to 2.2 x 10/sup 19/ ions/cm/sup 2/ and for target temperatures verying from ambient temperature to 400/sup 0/C. Analysis by scanning electron microscopy of the MO samples held at ambient temperatures during D/sup +/ irradiations in both pulsed and continuous modes revealed… more

Date: January 1, 1977

Creator: Das, S.K.; Kaminsky, M. & Dusza, P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Neutralization of H/sup -/ beams with gas jets

A test facility was constructed to create a compact curtain-shaped gas jet as a first-generation operational neutralizer for the 150 keV H/sup -/ beam. Different gases and vapors were considered, their optimum target thicknesses and neutralization efficiencies with respect to beam energies were explored. Two techniques of gas jet formation were compared. Multiparallel-channel effusive jets of CO/sub 2/ and H/sub 2/ were selected as test candidates.

Date: January 1, 1977

Creator: Lam, C. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Evaluation of resonance parameters for neutron interaction with iron isotopes for energies up to 400 keV

The evaluation of the resolved resonance parameters of iron isotopes 54, 56, and 57 in the neutron energy region below 400 keV is documented. Estimates of the uncertainties in the resonance parameters and correlation between the partial widths GAMMA/sub n/ and GAMMA/sub ..gamma../ are given when significant. Some details about the procedures used to evaluate the resonance parameters, their uncertainties, and correlations are reported. This evaluation was performed for the general-purpose file o… more

Date: September 1, 1980

Creator: Perey, C.M. & Perey, F.G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Summary of the working group on the construction and demonstration of a Siberian Snake

It was recognized as long ago as the 1977 Ann Arbor Meeting on Higher Energy Polarized Proton Beams that a ''Siberian Snake'' should be built and tested in an operating accelerator. A program to accomplish this at Argonne National Laboratory (ANL) was part of a proposal to DOE to construct a small R and D accelerator at ANL. This was never implemented and between then and now many theory papers have been written but no Proof of Principle Experiment (POPE) has been done. The present Ann Arbor wo… more

Date: January 1, 1985

Creator: Ratner, L. G. & Raylman, R. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Fast neutron capture cross sections of /sup 169/Tm, /sup 191/Ir, /sup 193/Ir, and /sup 175/Lu for 3 less than or equal to E/sub n/ less than or equal to 2000 keV

Fast neutron capture cross sections of /sup 169/Tm, /sup 191/Ir, /sup 193/Ir, and /sup 175/Lu, and the /sup 6/Li(n,..cap alpha..)/sup 3/H cross sections to which they are normalized are presented in tabular form for neutron energies between 3 and 2000 keV.

Date: November 1, 1977

Creator: Macklin, R.L.; Drake, D.M. & Malanify, J.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Defect structures in YBa/sub 2/Cu/sub 3/O/sub 7-x/ produced by electron irradiation

Defect structures in YBa/sub 2/Cu/sub 3/O/sub 7-x/ produced by electron irradiation at 300/sup 0/ K were investigated by transmission electron microscopy. Threshold energies for the production of visible defects were determined to be 152 keV and 131 keV (+- 7 keV) in directions near the a and b (b > a) axes (both perpendicular to c, the long axis in the orthorhombic structure), respectively. During above threshold irradiations in an electron flux of 3 x 10/sup 18/ cm/sup -2/ s/sup -1/, extended… more

Date: December 1, 1987

Creator: Kirk, M.A.; Baker, M.C.; Liu, J.Z.; Lam, D.J. & Weber, H.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Curium-245 and curium-247 neutron cross sections between 10 keV and 10 MeV

The optical model code 2PLUS and the statistical model codes COMNUC and CASCADE were used to compute neutron cross sections for Cm-245 and Cm-247 between 10 keV and 10 MeV. Cross sections for elastic and inelastic scattering, radiative capture, fission, and the (n,2n) reactions were computed. The parameters for the fission model were selected to yield agreement with the cross sections from the Physics-8 bomb shot. Pu-239 cross sections were calculated and compared with existing cross section ev… more

Date: July 1, 1982

Creator: Clifford, L.R. & McCrosson, F.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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BNL RFQ

A brief outline of the theoretical design has been presented at the Symposium. Particular emphasis has been placed on the rf design of the main cavity, end cells, and power feed. The relevance of the design has been considered with respect to the tuning and operating characteristics of the structure.

Date: January 1, 1983

Creator: Giordano, S.T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Evaluated fast neutron cross sections of uranium-238. [0. 045 to 20. 0 MeV]

An evaluated fast neutron data file of /sup 238/U is presented in the ENDF/B format. The incident energy range extends from 0.045 to 20.0 MeV. The content consists of: (1) neutron total cross sections, (2) fission cross sections, neutron emission spectra and associated properties, (4) neutron radiative-capture cross sections, (5) (n;2n') and (n;3n') processes, and (6) photon-production cross sections and spectra. The methodology of the file derivation is outlined. File content is graphically il… more

Date: October 1, 1977

Creator: Poenitz, W.; Pennington, E.; Smith, A. & Howerton, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Compact heavy ion RFQ preaccelerator for use at the CERN Linac I

This paper describes the LBL contribution to a project designed to provide fully-stripped oxygen beams for acceleration in the CERN PS complex. A preaccelerator for Linac I, consisting of an ECR ion source, an RFQ linac, and rf matching cavities, is being assembled as part of a collaborative arrangement among LBL, GSI, and CERN. The RFQ, designed and built at LBL, will accept analyzed oxygen +6 beam from the ECR at 5.6 keV/amu, and accelerate it to 139.5 keV/amu, the injection energy required f… more

Date: May 1, 1985

Creator: Gough, R.A.; Staples, J.; Caylor, R.; Howard, D.; MacGill, R. & Tanabe, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Neutron total and scattering cross sections of /sup 6/Li in the few MeV region

Neutron total cross sections of /sup 6/Li are measured from approx. 0.5 to approx. 4.8 MeV at intervals of approx.< 10 keV. Neutron differential elastic-scattering cross sections are measured from 1.5 to 4.0 MeV at approx.> 10 scattering angles and at incident-neutron intervals of approx.< 100 keV. Neutron differential inelastic-scattering cross sections are measured in the incident-energy range 3.5 to 4.0 MeV. The experimental results are extended to lower energies using measured neutron total… more

Date: February 1, 1980

Creator: Smith, A.; Guenther, P. & Whalen, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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RFQ development at LBL

LBL's interest in RFQ accelerators goes back to 1978. We have developed, constructed and operated a heavy ion machine that is the central part of an upgrade project in which our old proton injector linac is converted to a light ion injector system. We are now designing a second heavy ion RFQ linac which will be used at CERN for the injection of light ions into the PS complex. Other RFQ accelerators are under study for possible additional projects. LBL has pioneered new techniques, such as the v… more

Date: January 1, 1984

Creator: Staples, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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FXR one-nanosecond-jitter switch

A switching system using low-jitter spark gaps has been designed for a 20 MeV Flash X-Ray (FXR) linear induction accelerator that is being built at the Lawrence Livermore National Laboratory. The accelerator, which is now under construction, will consist of 54 modules connected in tandem. Each module will contribute up to 400 keV of energy to the electron beam traversing it. The experimental work included a test of one accelerator module designed to produce 400 keV. Of particular concern was th… more

Date: January 1, 1980

Creator: McFarlane, H.B. & Kihara, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Low energy electron capture by multicharged ions from hydrogen

In order to systematically investigate the behavior of low energy electron capture cross sections, the cross sections were measured for Xe/sup 2 +/ - Xe/sup 12 +/, Ar/sup 2 +/ - Ar/sup 9 +/, and Fe/sup 5 +/ - Fe/sup 6 +/ in H and H/sub 2/ for 3 < E < 26 keV/charge, and for C/sup 3 +/ - C/sup 5 +/ in H/sub 2/ for 0.15 < E < 0.45 keV/charge. (GHT)

Date: January 1, 1980

Creator: Phaneuf, R.A.; Crandall, D.H. & Meyer, F.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Titanium-II: an evaluated nuclear data file. [E < 20. 0 MeV]

A comprehensive evaluated nuclear data file for elemental titanium is outlined including definition of the data base, the evaluation procedures and judgments, and the final evaluated results. The file describes all significant neutron-induced reactions with elemental titanium and the associated photon-production processes to incident neutron energies of 20.0 MeV. In addition, isotopic-reaction files, consistent with the elemental file, are separately defined for those processes which are import… more

Date: June 1, 1977

Creator: Philis, C.; Howerton, R. & Smith, A. B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Low-energy nuclear fusion data and their relation to magnetic and laser fusion

The accuracy of the basic fusion data for the T(d,n)/sup 4/He, /sup 3/He(d,p)/sup 4/He, T(t,2n)/sup 4/He, D(d,n)/sup 3/He, and D(d,p)T reactions was investigated in the 10- to 100-keV bombarding energy region, and the effects of inaccuracies on the design of fusion reactors were assessed. The data base for these reactions (particularly, the most critical T(d,n)/sup 4/He reaction) rests on 25-year-old experiments the accuracy (often assumed to be +- 5%) of which has rarely been questioned: yet, … more

Date: April 1, 1980

Creator: Jarmie, N.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Michigan State Cyclotron Laboratory Annual Report: 1972

No Description Available.

Date: November 1972

Creator: Michigan State University. Cyclotron Laboratory.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Comparison of detector materials for time-of-flight positron tomography

Knowledge of detection efficiency and timing resolution is essential when comparing detector materials for time-of-flight positron tomography. We present results of Monte Carlo calculations of the detection efficiency of plastic, lead loaded plastic, NaI(T1), liquid xenon, bismuth germanate (BGO), CsF, BaF/sub 2/, Ge, and HgI/sub 2/ for 511 keV photons. We also use recently published values of timing resolution for these detector materials to tabulate the quantity (efficiency)/sup 2//(time reso… more

Date: June 1, 1982

Creator: Derenzo, S.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Dislocation sweeping of defects in neutron- and electron-irradiated niobium

The glide of dislocations in a (441)-oriented Nb single crystal irradiated at 325 K with 5.5 x 10/sup 21/ neutrons/m/sup 2/ (E > 0.1 MeV) is shown for increasing time of tensile elongation (2 x 10/sup -4/ mm/s) in the High Voltage Electron Microscope at Argonne National Laboratory. The dimensions of the tensile specimen in the guage length were approximately 2 mm x 0.5 mm x 0.0001 mm. An electron energy of 900 keV was used during the simultaneous deformation and TEM observation.

Date: October 1, 1983

Creator: Loomis, B. A. & Otero, M. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department