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TWENTY-FIVE GROUP REACTOR NUCLEAR DATA TAPE NEUTRON CROSS SECTIONS

Description: A compilation is presented, in the twenty-five group Reactor Nuclear Data Tape format, of neutron cross sections for elements of major interest for GE- ANPD reactor analysis. The tabulated data are a reproduction of neutron cross section information contained on the Reactor Nuclear Data Tape, which was recently prepared. A brief outline of methods used in processing of the cross sections is also included. (auth)
Date: June 13, 1961
Creator: Zwick, J. W. & Kostigen, T. J.
Partner: UNT Libraries Government Documents Department
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Two gauge boson physics at future colliders

Description: Electroweak unification suggests that there should be WW and ZZ physics analogous to {gamma}{gamma} physics. Indeed, WW and ZZ collisions will provide an opportunity to search for the Higgs boson at future high energy colliders. Cross sections in the picobarn range are predicted for Higgs boson production at the proposed 40-TeV SSC. While other states may be produced by WW and ZZ collisions, it is the Higgs boson that looms as the most attractive objective. 31 refs., 5 figs.
Date: May 13, 1988
Creator: Cahn, Robert N.
Partner: UNT Libraries Government Documents Department
open access

Interim Report on Fuel Cycle Neutronics Code Development.

Description: As part of the Global Nuclear Energy Partnership (GNEP), a fast reactor simulation program was launched in April 2007 to develop a suite of modern simulation tools specifically for the analysis and design of sodium cooled fast reactors. The general goal of the new suite of codes is to reduce the uncertainties and biases in the various areas of reactor design activities by enhanced prediction capabilities. Under this fast reactor simulation program, a high-fidelity deterministic neutron transpor… more
Date: May 13, 2008
Creator: Rabiti, C; Smith, M. A.; Kaushik, D. & Yang, W. S.
Partner: UNT Libraries Government Documents Department
open access

A brief review of the intensity of lines 3C and 3D in neon-like Fe XVII

Description: X-ray emission from neon-like Fe XVII has been measured with high-resolution spectrometers from laboratory or celestial sources for nearly seven decades. Two of the strongest lines regularly identified in these spectra are the {sup 1}P{sub 1} {yields} {sup 1}S{sub 0} resonance, and {sup 3}D{sub 1} {yields} {sup 1}S{sub 0} intercombination line, known as 3C and 3D, respectively. This paper gives a brief overview of measurements of the intensities of the lines 3C and 3D from laboratory and celest… more
Date: June 13, 2007
Creator: Brown, G V
Partner: UNT Libraries Government Documents Department
open access

Multiplicities in high energy interactions

Description: This paper reviews the data on multiplicities in high energy interactions. Results from e/sup +/e/sup -/ annihilation, from neutrino interactions, and from hadronic collisions, both diffractive and nondiffractive, are compared and contrasted. The energy dependence of the mean charged multiplicity, <n/sub ch/>, as well as the rapidity density at Y = 0 are presented. For hadronic collisions, the data on neutral pion production shows a strong correlation with <n/sub ch/>. The heavy particle fracti… more
Date: May 13, 1985
Creator: Derrick, M.
Partner: UNT Libraries Government Documents Department
open access

Nuclear structure calculations for astrophysical applications

Description: Here we present calculated results on such diverse properties as nuclear energy levels, ground-state masses and shapes, {beta}-decay properties and fission-barrier heights. Our approach to these calculations is to use a unified theoretical framework within which the above properties can all be studied. The results are obtained in the macroscopic-microscopic approach in which a microscopic nuclear-structure single-particle model with extensions is combined with a macroscopic model, such as the l… more
Date: March 13, 1992
Creator: Moeller, P.; Kratz, K.L. (Mainz Univ. (Germany). Inst. fuer Kernchemie) & Nix, J.R. (Los Alamos National Lab., NM (United States))
Partner: UNT Libraries Government Documents Department
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Preliminary evaluation of neutron capture cross sections for /sup 144/Sm, /sup 145/Sm and /sup 145/Pm

Description: We have made preliminary neutron-capture cross-section calculations of the Hauser-Feshbach type for the isotopes /sup 144/Sm, /sup 145/Sm, and /sup 145/Pm to investigate the production of radioactive /sup 145/Pm by neutron capture on the stable isotope /sup 144/Sm. The calculations were made for incident neutron energies from 2.5 MeV to about 1/sup -4/ or 10/sup -5/ MeV, wherever the first unbound resonance was estimated to occur in each case. At that energy, the calculated value was reduced by… more
Date: February 13, 1986
Creator: Gardner, D. G. & Gardner, M. A.
Partner: UNT Libraries Government Documents Department
open access

Report of the QCD Working Group

Description: We discuss some current problems associated with the applications of QCD to event rates in high energy collisions. Emphasis is given to the current ambiguities and uncertainties that exist in estimates of signals and backgrounds. The production of jets and isolated photons at hadron colliders is discussed in some detail. The problems of jet definition are addressed. Some features of the events underlying the hard scattering process are discussed. 72 refs., 32 figs., 3 tabs.
Date: January 13, 1989
Creator: Hinchliffe, I. & Shapiro, M. D.
Partner: UNT Libraries Government Documents Department
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Charged-hadron production in e/sup +/e/sup -/ collisions at PEP with the TPC

Description: We have studied hadron production in e/sup +/e/sup -/ annihilation at 29 GeV center of mass energy. We have measured the particle fractions and particle separated differential cross sections using the PEP-4 (Time Projection Chamber) detector. The particles were identified by measuring their ionization energy loss (dE/dx). The pion fraction decreases from above 90% at 400 MeV/c to 55% at 6 GeV/c. Our results for kaon production require that a large number of kaons are produced by strange quarks … more
Date: May 13, 1983
Creator: Hadley, N.J.
Partner: UNT Libraries Government Documents Department
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Heavy Flavor Production at Fixed Target and Collider Energies

Description: A review is presented of heavy quark production in /bar p/p, p, and pp interactions at fixed target and collider energies. Calculations of total cross sections are described including contributions through next-to-leading order in QCD perturbation theory. Comparisons with available data on charm and bottom quark production show good agreement for reasonable values of charm and bottom quark masses and other parameters. Open issues in the interpretation of results are summarized. A discussion is … more
Date: October 13, 1988
Creator: Berger, E. L.
Partner: UNT Libraries Government Documents Department
open access

Phenomenology of Heavy Flavor Production

Description: A review is presented of heavy quark in /bar p/p, p, and pp interactions at fixed target and collider energies. Calculations of total cross sections are described, including contributions through next-to-leading order in QCD perturbation theory. Comparisons with available data on charm and bottom quark production show good agreement for reasonable values of charm and bottom quark masses and other parameters. Open issues in the interpretation of results are summarized. A discussion is presented … more
Date: October 13, 1988
Creator: Berger, E. L.
Partner: UNT Libraries Government Documents Department
open access

Nuclear metallurgy lectures: Chapter 1

Description: The purpose of this course is two-fold. It should serve as a review for the metallurgist of the classical metallurgical concepts applied to such metals as uranium, thorium, plutonium, and zirconium. These metals are relatively unfamiliar to the metallurgist, but the concepts are still the same ones applied to familiar metals. The second purpose is to acquaint the non-metallurgist with the reasons for selection, advantages, and disadvantages of the various fuels and structural materials used in … more
Date: April 13, 1955
Creator: Bush, S. H.
Partner: UNT Libraries Government Documents Department
open access

Nuclear structure calculations for astrophysical applications

Description: Here we present calculated results on such diverse properties as nuclear energy levels, ground-state masses and shapes, {beta}-decay properties and fission-barrier heights. Our approach to these calculations is to use a unified theoretical framework within which the above properties can all be studied. The results are obtained in the macroscopic-microscopic approach in which a microscopic nuclear-structure single-particle model with extensions is combined with a macroscopic model, such as the l… more
Date: March 13, 1992
Creator: Moeller, P.; Kratz, K. L. & Nix, J. R.
Partner: UNT Libraries Government Documents Department
open access

Surrogate Nuclear Reactions and the Origin of the Heavy Elements

Description: An innovative method for indirectly determining reaction cross sections via Surrogate Nuclear Reactions is presented. Exploring indirect approaches for obtaining reaction cross sections is important since a large number of nuclear reactions relevant to astrophysics cannot be measured with currently available techniques. A program is outlined for developing a comprehensive framework for planning and interpreting experiments that can yield the cross sections of interest. The applications will foc… more
Date: July 13, 2004
Creator: Escher, J; Ahle, L; Bernstein, L; Church, J; Dietrich, F; Forssen, C et al.
Partner: UNT Libraries Government Documents Department
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J/(ps) Production via Initial State Radiation in e+e- ----&gt; (m)+(m)-y at an e+e- Center-of-Mass Energy near 10.6 GeV

Description: The authors have used a study of the process e{sup +}e{sup -} {yields} {mu}{sup +}{mu}{sup -} {gamma} at a center-of-mass energy near the {Upsilon}(4S) resonance for a {mu}{sup +}{mu}{sup -} invariant mass range near the J/{psi} mass to extract the cross section {sigma}(e{sup +}e{sup -} {yields} J/{psi}{gamma} {yields} {mu}{sup +}{mu}{sup -}{gamma}). The data set, corresponding to an integrated luminosity of 88.4 fb{sup -1}, was collected using the BABAR detector at the PEP-II collider. They me… more
Date: November 13, 2003
Creator: Wright, D & Collaboration, T B
Partner: UNT Libraries Government Documents Department
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kt-factorization for Hard Processes in Nuclei

Description: Two widely proposed kt-dependent gluon distributions in the small-x saturation regime are investigated using two particle back-to-back correlations in high energy scattering processes. The Weizsacker-Williams gluon distribution, interpreted as the number density of gluon inside the nucleus, is studied in the quark-antiquark jet correlation in deep inelastic scattering. On the other hand, the unintegrated gluon distribution, defined as the Fourier transform of the color-dipole cross section, is … more
Date: September 13, 2010
Creator: Dominguez, Fabio; Xiao, Bo-Wen & Yuan, Feng
Partner: UNT Libraries Government Documents Department
open access

Multiplicity and charged particle emission in relativistic heavy ion collisions. [Cross sections, statistical thermodynamic models]

Description: Single-particle inclusive cross sections of precisely identified fragments are studied together with associated multiplicities of fast charged particles. Neon and argon projectiles are made to bombard uranium, calcium, and aluminium. It is found that all the observed fragment spectra are structureless and more or less exponentially decaying throughout the range of studied fragment masses. A catalogue of experimentally found qualitative features is given and the applicability of simple statistic… more
Date: June 13, 1977
Creator: Gutbrod, H. H.; Gosset, J.; Meyer, W. G.; Poskanzer, A. M.; Sandoval, A.; Stock, R. et al.
Partner: UNT Libraries Government Documents Department
open access

Measurements of the Total Charge-Changing Cross Sections for Collisions of Fast Ions with Target Gas Using High Current Experiment

Description: The sum of ionization and charge-exchange cross sections of several gas targets (H2, N2, He, Ne, Kr, Xe, Ar, and water vapor) impacted by 1MeV K+ beam are measured. In a high current ion beam, the self-electric field of the beam is high enough that ions produced from the gas ionization or charge exchange by the ion beam are quickly swept to the sides of accelerator. The flux of the expelled ions is measured by a retarding field analyzer. This allows accurate measuring of the total charge-changi… more
Date: April 13, 2009
Creator: Covo, Michel Kireeff; Molvik, Arthur W.; Kaganovich, Igor D.; Shnidman, Ariel & Vujic, Jasmina L.
Partner: UNT Libraries Government Documents Department
open access

Contrasting Supersymmetry and Universal Extra Dimensions at the CLIC Multi-TeV e+e- Collider

Description: Universal extra dimensions and supersymmetry have rather similar experimental signatures at hadron colliders. The proper interpretation of an LHC discovery in either case may therefore require further data from a lepton collider. In this paper we identify methods for discriminating between the two scenarios at the linear collider. We study the processes of Kaluza-Klein muon pair production in universal extra dimensions in parallel to smuon pair production in supersymmetry, accounting for the ef… more
Date: July 13, 2005
Creator: Battaglia, Marco; Datta, AseshKrishna; De Roeck, Albert; Kong, Kyoungchul & Matchev, Konstantin T.
Partner: UNT Libraries Government Documents Department
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Cometary X-ray emission: theoretical cross sections following charge exchange by multiply charged ions of astrophysical interest

Description: The CTMC method is used to calculate emission cross sections following charge exchange collisions involving highly charged ions of astrophysical interest and typical cometary targets. Comparison is made to experimental data obtained on the EBIT machine at Lawrence Livermore National Laboratory (LLNL) for O{sup 8+} projectiles impinging on different targets at a collision energy of 10 eV/amu. The theoretical cross sections are used together with ion abundances measured by the Advanced Compositio… more
Date: February 13, 2007
Creator: Otranto, S; Olson, R E & Beiersdorfer, P
Partner: UNT Libraries Government Documents Department
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Studies in Low-Energy Nuclear Science

Description: This report presents a summary of research projects in the area of low energy nuclear reactions and structure, carried out between March 1, 2006 and October 31, 2009 which were supported by U.S. DOE grant number DE-FG52-06NA26187.
Date: January 13, 2010
Creator: Brune, Carl R. & Grimes, Steven M.
Partner: UNT Libraries Government Documents Department
open access

POINT 2007: A Temperature Dependent ENDF/.B-VII.0 Data Cross Section Library

Description: This report is one in the series of ''POINT'' reports that over the years have presented temperature dependent cross sections for the then current version of ENDF/B. In each case I have used publicly available nuclear data (the current ENDF/B data, available online at the National Nuclear Data Center, Brookhaven National Laboratory http://www.nndc.bnl.gov/) and publicly available computer codes (the current PREPRO codes, available on-line at the Nuclear Data Section, IAEA, Vienna, Austria http:… more
Date: February 13, 2007
Creator: Cullen, D E
Partner: UNT Libraries Government Documents Department
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Enhancement of REBUS-3/DIF3D for Whole-Core Neutronic Analysis of Prismatic Very High Temperature Reactor (VHTR).

Description: Enhancements have been made to the REBUS-3/DIF3D code suite to facilitate its use for the design and analysis of prismatic Very High Temperature Reactors (VHTRs). A new cross section structure, using table-lookup, has been incorporated to account for cross section changes with burnup and fuel and moderator temperatures. For representing these cross section dependencies, three new modules have been developed using FORTRAN 90/95 object-oriented data structures and implemented within the REBUS-3 c… more
Date: October 13, 2006
Creator: Lee, C. H.; Zhong, Z.; Taiwo, T. A.; Yang, W. S.; Khalil, H. S. & Smith, M. A.
Partner: UNT Libraries Government Documents Department
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