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Selected problems in experimental intermediate energy physics

Description: The objectives of this research program are to: investigate forefront problems in experimental intermediate energy physics; educate students in this field of research; and, develop the instrumentation necessary to undertake this experimental program. Generally, the research is designed to search for physical processes which cannot be explained by conventional models of elementary interactions. This includes the use of nuclear targets where the nucleus provides a many body environment of strongl… more
Date: September 1, 1990
Creator: Mayes, B.W.; Hungerford, E.V. & Pinsky, L.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dose measurements and calculations in the epithermal neutron beam at the Brookhaven Medical Research Reactor (BMRR)

Description: The characteristics of the epithermal neutron beam at BMRR were measured, calculated, and reported. This beam has already been used for animal irradiations. We anticipate that it will be used for clinical trials. Thermal and epithermal neutron flux densities distributions, and dose rate distributions, as a function of depth were measured in a lucite dog-head phantom. Monte Carlo calculations were performed and compared with the measured values. 2 refs., 4 figs., 1 tab.
Date: January 1, 1990
Creator: Fairchild, R. G.; Greenberg, D.; Kamen, Y.; Fiarman, S.; Benary, V.; Kalef-Ezra, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Introduction and overview to some topics in perturbative QCD and their relationship to non-perturbative effects

Description: The main thrust of this talk is to review and discuss various topics in both perturbative and non-perturbative QCD that are, by and large, model independent. This inevitably means that we shall rely heavily on the renormalization group and asymptotic freedom. Although this usually means that one has to concentrate on high energy phenomena, there are some physical processes even involving bound states which are certainly highly non-perturbative, where one can make some progress without becoming … more
Date: January 1, 1990
Creator: West, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of a Drum Chopper for Use on a New Small Angle Diffractometer at IPNS

Description: Light-weight drum choppers rotating at 15 Hz have been in use on the IPNS powder diffractometers for several years, where they serve to eliminate the delayed-neutron background from much of the spectral region of interest. Monte Carlo simulations indicate that a similar chopper operated at 15 Hz should do an excellent job of delayed-neutron removal in the new small-angle diffractometer being designed at IPNS. The simulations also show that when the same chopper is operated at 7.5 Hz it performs… more
Date: January 1, 1990
Creator: Crawford, R.K.; Epperson, J.E.; Thiyagarajan, P. & Carpenter, J.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experiments with Fermilab polarized proton and antiproton beams

Description: We summarize activities concerning the Fermilab polarized beams. They include a brief description of the polarized-beam facility, measurements of beam polarization by polarimeters, asymmetry measurements in the {pi}{degree} production at high p{sub {perpendicular}} and in the {Lambda} ({Sigma}{degree}), {pi}{sup {plus minus}}, {pi}{degree} production at large x{sub F}, and {Delta}{sigma}{sub L}(pp, {bar p}p) measurements. 20 refs., 5 figs.
Date: January 1, 1990
Creator: Yokosawa, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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What (if anything) can few-body strange systems teach us about quark-gluon hadronic substructure

Description: We discuss expectation, relevant to the proposed ({pi},K) program at PILAC, for the effects of hadronic quark-gluon substructure on the physics of few-body strangeness {minus}1 systems, in the context of QCD-inspired models used previously to describe the hadron spectrum and short distance nucleon-nucleon scattering. 50 refs., 2 tabs.
Date: January 1, 1990
Creator: Maltman, K. (Toronto Univ., ON (Canada). Dept. of Physics Los Alamos National Lab., NM (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proton rapidity distributions from 60 GeV/n sup 16 O+Au collisions

Description: An analysis of the proton rapidity distribution in central {sup 16}O+Au collisions at 60 GeV/n measured in the NA35 streamer chamber detector at the CERN SPS is presented. The charge excess of positive particles over negative particles was measured. The rapidity distribution of the charge excess which can be associated with the primordial protons in the collision is studied in terms of the nuclear stopping power and is compared to the predictions of various models. 7 refs., 2 figs.
Date: May 1, 1990
Creator: Baechler, J.; Hoffman, M.; Runge, K.; Schmoetten, E. (Freiburg Univ. (Germany, F.R.). Fakultaet fuer Physik); Bartke, J.; Gladysz, E. (Institute of Nuclear Physics, Cracow (Poland)) et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experimental investigation of the production of glueballs and meson resonance states

Description: We have made striking and considerable progress in our AGS program which is searching for a Quark-Gluon Plasma or other new phenomena at the AGS. We are employing a TCP Tracking Magnetic Spectrometer that has handled up to {approx}100 tracks, the maximum observed in 14.5 GeV/c {times} A Si ions incident on Au and Cu. In essence the TPC covers more than the forward half hemisphere in the nucleon-nucleon cms (i.e. {ge} 2{pi}) and thus allows tracking, momentum and angular analysis of the charged … more
Date: December 19, 1990
Creator: Lindenbaum, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutron measurements in search of cold fusion

Description: We have conducted a research for neutron emission from cold fusion systems of the electrochemical type and, to a lesser extent, the high-pressure gas cell type. Using a high-efficiency well counter and an NE 213 scintillator, the experiments were conducted on the earth's surface and in a shielded cave approximately 50 ft underground. After approximately 6500 h of counting time, we have obtained no evidence for cold fusion processes leading to neutron production. However, we have observed all th… more
Date: January 1, 1990
Creator: Anderson, R. E.; Goulding, C. A.; Johnson, M. W.; Butterfield, K. B.; Gottesfeld, S.; Baker, D. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Enriched vs non-enriched vs non-fissile targets for pulsed spallation neutron sources

Description: Numerous options exist among alternatives for target material and design of the neutron producing target in pulsed spallation neutron sources. This report surveys the advantages, disadvantages and limitations of some of the alternatives, including discussions of neutron yields, delayed neutron backgrounds, source pulse widths, source-to-moderator coupling, materials performance, fabrication problems, safeguards and security and hazards questions. 5 refs., 5 figs., 2 tabs.
Date: January 1, 1990
Creator: Carpenter, J.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutral kaon and lambda production in electron-positron annihilation at 29 GeV and the Z boson resonance

Description: The production of K{sup 0} and {Lambda} in the hadronization of q{bar q} events from e{sup +}e{sup {minus}} collisions at 29 GeV and the Z{sup 0} resonance is studied using the Mark II detector as upgraded for running at the Stanford Linear Collider. Hadronization processes cannot presently be calculated with Quantum Chromodynamics; instead, hadronization models must be used in comparisons with data. In these models, hadronization occurs at local energy scales of a few GeV, a level at which sma… more
Date: October 1, 1990
Creator: Fordham, C.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solid-state proton conductors

Description: The purpose of this program was to survey the field of solid-state proton conductors (SSPC), identify conductors that could be used to develop solid-state fuel cells suitable for use with coal derived fuel gases, and begin the experimental research required for the development of these fuel cells. This document covers the following topics: the history of developments and current status of the SSPC, including a review of proton conducting electrolyte structures, the current status of the medium … more
Date: December 1, 1990
Creator: Jewulski, J. R.; Osif, T. L. & Remick, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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(Particle physics)

Description: This report briefly discusses the following topics: rare and forbidden eta meson and muon decays to test the standard model; tests of charge symmetry and isospin invariance; studies of baryon resonances; and exploratory investigations in support of the previous programs. (LSP)
Date: July 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiobiology of boron neutron capture therapy: Problems with the concept of relative biological effectiveness

Description: The radiation dose delivered to cells in vitro or vivo during boron neutron capture therapy (BNCT) is a mixture of photons, fast neutrons and heavy charged particles from the interaction of neutrons with nitrogen and born. The concept of relative biological effectiveness (RBE) had been developed to allow comparison of the effects of these radiations with the effects of standard photon treatments such as 250 kVp x-rays or {sup 60}Co gamma rays. The RBE value for all of these high linear energy t… more
Date: January 1, 1990
Creator: Coderre, J.A. & Makar, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Soudan 2 honeycomb calorimeter

Description: Soudan 2 is an 1100-ton honeycomb tracking calorimeter which is being constructed to search for nucleon decay. The detector consists of finely segmented iron instrumented with long drift tubes, and records three spatial coordinates and dE/dx for every gas crossing. Excellent event reconstruction capability, particle identification and muon sign and direction determination give superior rejection of the neutrino background to nucleon decay in many modes. The first 620 tons of Soudan 2 are now in… more
Date: December 1, 1990
Creator: Garcia-Garcia, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Is there a hard gluonic contribution to the first moment of g sub 1

Description: We show that the size of the hard gluonic contribution to the first moment of the proton's spin-dependent structure function g{sub 1} is entirely a matter of the convention used in defining the quark distributions. If the UV regulator for the spin-dependent quark distributions respects the gauge invariance of Green's functions (allows shifts of loop momenta) and respects the analyticity structure of the unregulated distributions, then the hard gluonic contribution to the first moment of g{sub 1… more
Date: December 19, 1990
Creator: Bodwin, G.T. (Argonne National Lab., IL (USA)) & Qiu, Jianwei (State Univ. of New York, Stony Brook, NY (USA). Inst. for Theoretical Physics)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Report of the CEBAF PAC4 Subcomittee on STAR

Description: This report discusses the following topics: the symmetric toroidal array (STAR) spectrometer facility; investigation of the N {yields} {Delta} transition; Hyperon production in the (e, e{prime}k) reactions; investigation of few-body systems with the (e, e{prime}p) reaction; nuclear structure studies with the (e,e{prime}pp) reaction; Measurement of G{sub Em} in a recoil polarimetry measurement; parity violation measurements; and STAR design and performance.
Date: August 8, 1990
Creator: Barnes, P. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Gamma-ray induced displacement in D20 reactors

Description: Gamma-ray damage to tank walls is typically more severe in D{sub 2}O than in H{sub 2}O moderated lattices because of the much higher ratios of slow-to-fast neutron flux. To estimate this effect it was first necessary to develop energy dependent gamma-ray displacement cross sections for iron. These, along with coupled neutron-gamma-ray transport computations, provided a measure of displacement damage from this source in SRS reactor tank walls. Gamma-ray displacements originating from high energy… more
Date: May 1, 1990
Creator: Baumann, N.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Research accomplishments and future goals in particle physics

Description: This document presents our proposal to continue the activities of Boston University researchers in eight projects in high energy physics research: Colliding Beams Physics; Accelerator Design Physics; MACRO Project; Proton Decay Project; Theoretical Particle Physics; Muon G-2 Project; and Hadron Collider Physics. The scope of each of these projects is presented in detail in this paper.
Date: January 5, 1990
Creator: Whitaker, J.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MCNP S(. alpha. beta. ) detector scheme

Description: An approximate method to allow S({alpha},{Beta}) thermal collision contributions to point detectors and DXTRAN by Prael has been implemented in MCNP4. The method is described and test results are presented, including some results that indicate inadequacies in the NJOY processing of the nuclear data. 9 refs., 53 figs., 6 tabs.
Date: October 1, 1990
Creator: Hendricks, J.S. & Prael, R.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advantages of polarization experiments at RHIC

Description: We point out various spin experiments that could be done if the polarized beam option is pursued at RHIC. The advantages of RHIC for investigating several current and future physics problems are discussed. In particular, the gluon spin dependent structure function of the nucleon could be measured cleanly and systematically. Relevant experience developed in conjunction with the Fermilab Polarized Beam program is also presented. 8 refs., 2 tabs.
Date: January 1, 1990
Creator: Underwood, D.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mechanistic Understanding of Irradiation-Induced Corrosion of Zirconium Alloys in Nuclear Power Plants: Stimuli, Status, and Outlook

Description: Failures in the basic materials used in nuclear power plants continue to be costly and insidious, despite increasing industry vigilance to catch failures before they degrade safety. For instance, the overall costs to the US industry from materials problems could amount to as much as $10 billion annually. Moreover, estimates indicate that the cost of a pipe failure in a nuclear plant is one hundred times greater than the cost of a similar failure in a coal-fired plant. There are important practi… more
Date: May 1, 1990
Creator: Johnson, A. B., (Jr.); Ishigure, K.; Nechaev, A. F.; Reznichenko, E. A.; Cox, B.; Lemaignan, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent results and future prospects for the polarized beam at Fermilab

Description: We summarize activities concerning the Fermilab polarized beams. They include a brief description of the polarized-beam facility, measurements of beam polarization by polarimeters, asymmetry measurements in the {pi}{degree} production at high p{sub {perpendicular}} and in the {Lambda} ({Sigma}{degree}), {pi}{sup {plus minus}}, {pi}{degree} production at large x{sub F}, and {Delta}{sigma}{sub L}(pp, {anti p}p) measurements (Fermilab E-704). In the future we plan to investigate the proton-spin cr… more
Date: January 1, 1990
Creator: Yokosawa, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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