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Prospects for physics at e/sup +/e/sup -/ linear colliders

Description: The present thinking on high-energy e/sup /plus//e/sup /minus// linear colliders is reviewed, stressing those points that have consequences for detector design and physics analyses. Detector requirements are discussed. Experimental aspects of the physics that can be done at these colliders are discussed: first the general physics environment, then a standard process, W/sup /plus// W/sup /minus// detection, and finally four examples of the discovery potential of these colliders /emdash/ heavy qu… more
Date: March 1, 1988
Creator: Feldman, G. J.
Partner: UNT Libraries Government Documents Department
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Di-leptons at the Bevalac

Description: Recent results on the production of di-leptons measured by the Di-Lepton-Spectrometer (DLS) collaboration are discussed. Results are reported from observations made on p /plus/ Be collisions with proton beams from 1.0 to 4.9 GeV and on Ca collisions with calcium beams of 1.0 to 2.0 GeV/A. The shape of the distributions are similar to that at higher energies. The low mass cross section appears to be explained by ..pi..-..pi.. annihilation, but detailed calculations are needed to substantiate tha… more
Date: March 1, 1988
Creator: Matis, H.S.
Partner: UNT Libraries Government Documents Department
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Calculated hadronic transmission through iron absorbers

Description: The transmission of hadrons through iron absorbers is investigated for a variety of experimental configurations, and incident particle types (protons, and charged pions) and energies (0.8 GeV/c to 100 GeV). The results obtained are consistent with available experimental data.
Date: March 1, 1978
Creator: Gabriel, T. A. & Bishop, B. L.
Partner: UNT Libraries Government Documents Department
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Electron-positron physics at 1 TeV

Description: We discuss the motivation for TeV e/sup +/ e/sup )minus/) linear colliders, some aspects of their design, and the experimental consequences that follow from the design. After a brief discussion of the general physics environment, we consider the discovery potential of these colliders by examining three sample processes: the detection of new heavy leptons, standard Higgs bosons, and charged Higgs bosons. 13 refs., 22 figs., 5 tabs.
Date: March 1, 1988
Creator: Feldman, G. J.
Partner: UNT Libraries Government Documents Department
open access

FITPULS: a code for obtaining analytic fits to aggregate fission-product decay-energy spectra. [In FORTRAN]

Description: The operation and input to the FITPULS code, recently updated to utilize interactive graphics, are described. The code is designed to retrieve data from a library containing aggregate fine-group spectra (150 energy groups) from fission products, collapse the data to few groups (up to 25), and fit the resulting spectra along the cooling time axis with a linear combination of exponential functions. Also given in this report are useful results for aggregate gamma and beta spectra from the decay of… more
Date: March 1, 1980
Creator: LaBauve, R. J.; George, D. C. & England, T. R.
Partner: UNT Libraries Government Documents Department
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Proton decay: 1982

Description: Employing the current world average ..lambda../sub MS/ = 0.160 GeV as input, the minimal Georgi-Glashow SU(5) model predicts sin/sup 2/theta/sub W/(m/sub W/) = 0.214, m/sub b//m/sub tau/ approx. = 2.8 and tau/sub p/ approx. = (0.4 approx. 12) x 10/sup 29/ yr. The first two predictions are in excellent agreement with experiment; but the implied proton lifetime is already somewhat below the present experimental bound. In this status report, uncertainties in tau/sub p/ are described and effects of… more
Date: March 4, 1982
Creator: Marciano, William J.
Partner: UNT Libraries Government Documents Department
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Search for extreme states in nuclear matter (or looking for collective phenomena)

Description: After some introductory background material, the report discusses data from single-particle inclusive reactions with emission of nucleons and pions. The anomalous neutron-to-proton ratio is explained; pion data show a possible indication of a long-lived fireball. The other major topic is multiparticle correlations (noninclusive data). The energy dissipation in the target nucleus and the process of total disintegration (target explosion) leads over to pressure effects (bounce-off) in the heavy f… more
Date: March 1, 1980
Creator: Gutbrod, H.H.
Partner: UNT Libraries Government Documents Department
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Annual environmental monitoring report, January-December 1983

Description: Environmental monitoring results continue to demonstrate that environmental radiological impact due to SLAC operation is not easily distinguishable from natural environmental sources. During 1983, the maximum approximated neutron dose near the site boundary was 5 mrem. There have been no measurable increases in radioactivity in ground water attributable to SLAC operations since operation began in 1966. We have never found any evidence of radioactivity in ground water in excess of natural backgr… more
Date: March 1, 1984
Partner: UNT Libraries Government Documents Department
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Heavy quarks in hadronic collisions

Description: It is suggested that the presence of c anti c-pairs on the 1 to 2% level in the hadron Fock state decomposition (intrinsic charm) gives a natural description of the ISR data for charm hadron production. The theoretical foundations of the intrinsic charm hypothesis together with its consequences for lepton- and hadron-induced reactions are discussed in some detail. There is no contradiction with the EMC data on F/sub 2//sup c/ provided the appropriate threshold dependence is taken into account.
Date: March 1, 1982
Creator: Brodsky, S.J. & Peterson, C.
Partner: UNT Libraries Government Documents Department
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Calibration of an electron/proton monitor for the earth's radiation belt at 4 R/sub E/

Description: A charged particle dosimeter (the Burst Detector Dosimeter or BDD) was designed and fabricated and will be flown on certain of the Global Positioning Satellite (GPS) series of spacecraft. The BDD will monitor the dose received by the GPS spacecraft from the fluxes of electrons and protons in the Earth's radiation belt. The BDD uses absorbers in front of silicon sensors to determine the energy thresholds for measuring incident particle fluxes; and the magnitude of energy loss in a single sensor … more
Date: March 1, 1982
Creator: Higbie, P.R.; Belian, R.D.; Argo, H.V. & Baker, D.N.
Partner: UNT Libraries Government Documents Department
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Structural Changes Observed in (Mo /sub 6/Ru /sub 4/)/sub x/B/sub 1-x/ Amorphous Alloys Observed with Positron Annihilation

Description: Changes in the structure of (Mo /sub 6/Ru /sub 4/)/sub x/B/sub 1-x/ amorphous alloys were observed in positron annihilation analysis using both positron lifetime and Doppler broadening techniques. The changes were introduced into the alloy either by varying the boron fraction or by neutron irradiation. Similar results were observed both in the irradiated alloys and those with vacant boron sites. The positron annihilation data suggest that the modified structure contains regions of open volume a… more
Date: March 26, 1982
Creator: Howell, R. H. & Johnson, W. L.
Partner: UNT Libraries Government Documents Department
open access

Fast-neutron coincidence-counter manual

Description: The fast neutron counter (FNC) described in this report is a computer-based assay system employing fast-pulse counting instrumentation. It is installed below a glove box in the metal electrorefining area of the Los Alamos National Laboratory Plutonium Processing Facility. The instrument was designed to assay plutonium salts and residues from this process and to verify the mass of electrorefined metal. Los Alamos National Laboratory Groups Q-1, Q-3, and CMB-11 carried out a joint test and evalua… more
Date: March 1, 1982
Creator: Ensslin, N.; Atwell, T. L.; Lee, D. M.; Erkkila, B.; Marshall, R. S.; Morgan, A. et al.
Partner: UNT Libraries Government Documents Department
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Sawtooth oscillations in the flux of runaway electrons to the PLT limiter

Description: Increased fluxes of runaway electrons at the PLT limiter are observed in the few milliseconds following internal disruptions. These fluxes have an inverted (outside) sawtooth character. The time for the flux to reach a maximum after the disruption has been studied as a function of the plasma parameters for thousands of PLT discharges. One interpretation is that this delay represents the time for a perturbation to the runaway electron population to travel from the q = 1 region to the plasma boun… more
Date: March 1, 1982
Creator: Barnes, C.W. & Strachan, J.D.
Partner: UNT Libraries Government Documents Department
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Meson and baryon correlation studies using the PEP-TPC/2. gamma. Facility

Description: Results on vector meson, and strange and charmed-baryon production are presented for data taken during the period 1982--1986 using the TPC/2{gamma} detector at PEP. Vector mesons ({rho}{sup 0}, K{sup *} and {phi}) with 0, 1 and 2 strange quarks are used to obtain redundant measures of strange-quark suppression and of the vector to pseudoscalar ratio in hadronization. Measurements of the production rates of {Lambda}, {Xi}{sup {minus}}, {Omega} and {Xi}{sup *0} hyperons and for the {Lambda}{sub c… more
Date: March 1, 1991
Creator: Ronan, M.T.
Partner: UNT Libraries Government Documents Department
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Fast neutron gauging feasibility study. Final report

Description: A study was conducted to determine the ability of a collimated neutron beam to locate defects in polyurethane foam encapsulated between sintered-iron and stainless-steel jackets. Test results indicate that although a source can be used, an iron-filtered neutron beam provides the greatest sensitivity. Voids having a diameter of 0.2 cm, an effective area of 1 cm/sup 2/, and a volume of 0.14 cm/sup 3/ were successfully detected.
Date: March 1, 1978
Creator: Heckman, R.V.
Partner: UNT Libraries Government Documents Department
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A 3 TeV on 3 TeV proton-proton dedicated collider for Fermilab

Description: The Fermilab Dedicated Collider proposed in May 1983 is a 2 TeV on 2 TeV p)bar p) collider. The expected luminosity is )approximately) 10/sup 31/ cm/sup (minus/2)sec/sup )minus/1) and the estimated cost is )approximately) $362M (FY-83 dollars). Since 1983 both the superconducting magnet and the particle detector technologies have advanced and the countenance of physics, hence the desired characteristics of new facilities have also altered somewhat. We want to show here that with the new magnet … more
Date: March 30, 1988
Creator: Teng, L.C.
Partner: UNT Libraries Government Documents Department
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Energy transfer and utilization in biological systems. Final report, September 1, 1967--September 15, 1976. [Fluorescence studies of photosynthesis]

Description: In fluorescence studies of the photosynthetic process it was shown that the photosynthetic rate and light loss via chlorophyll fluorescence are strictly complementary. The exciplex state of matter responsible for most photochemistry was discovered and a wide variety of information about the state gained from studies of indole exciplexes. In addition to the nature of the bonding, degree of stability and general excited state behavior of indole exciplexes, their ability to lose electrons in a hig… more
Date: March 1, 1978
Creator: Lumry, R.W.
Partner: UNT Libraries Government Documents Department
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CDF: Recent results and future prospects

Description: We present recent results from the Collider Detector at Fermilab. Searches for the top quark have established a lower bound of M{sub top} > 91 GeV/c{sup 2} (at 95% confidence level). A measurement of B{sup o}{bar B}{sup o} mixing has been obtained from b{bar b} {yields} e{mu}, ee events. Measurements of b-quark production have been obtained from e + X events and J/{psi} + K events. The mass of the W boson has been determined to be M{sub W} = 79.91 {plus minus} 0.39 GeV/c{sup 2}. In searching fo… more
Date: March 3, 1992
Creator: Yeh, G.P.
Partner: UNT Libraries Government Documents Department
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Dark matter and cosmology

Description: The cosmological dark matter problem is reviewed. The Big Bang Nucleosynthesis constraints on the baryon density are compared with the densities implied by visible matter, dark halos, dynamics of clusters, gravitational lenses, large-scale velocity flows, and the {Omega} = 1 flatness/inflation argument. It is shown that (1) the majority of baryons are dark; and (2) non-baryonic dark matter is probably required on large scales. It is also noted that halo dark matter could be either baryonic or n… more
Date: March 1, 1992
Creator: Schramm, D. N.
Partner: UNT Libraries Government Documents Department
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Muon fluence measurements at the site boundary for 1985

Description: Muon fluence (muons cm/sup -2/) was measured downstream of the experimental area beamlines, just beyond the Fermilab site boundary at Route 38. The purpose of these measurements was to obtain an estimate of the yearly off-site radiation exposure to the general population due to accelerator-produced muons during the 1985 800 GeV run.
Date: March 1, 1986
Creator: Elwyn, A.J.
Partner: UNT Libraries Government Documents Department
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Cancer risks and neutron RBE's from Hiroshima and Nagasaki

Description: The new radiation dose estimates for Hiroshima and Nagasaki are radiobiologically examined for compatability with other human and experimental data. The new doses show certain improvements over the original T65 doses. However, they suggest for chronic granulocytic leukemia, total malignancies, and chromosome aberrations, at neutron doses of 1 rad, RBEs in excess of 100, higher than expected from other findings. This and other indications suggest that either there are unrecognized systematic pro… more
Date: March 25, 1982
Creator: Dobson, R.L. & Straume, T.
Partner: UNT Libraries Government Documents Department
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Positron-annihilation studies of molybdenum irradiated by protons, neutrons, or electrons

Description: Annealed molybdenum was irradiated at room temperature by energetic protons or neutrons and the fluence and recoil energy dependence of two traps was measured. Comparison of trapping rates with calculations of damage energy correlates high energy recoils with the short lifetime trap and low energy recoils with the longer lifetime.
Date: March 26, 1982
Creator: Howell, R.H.
Partner: UNT Libraries Government Documents Department
open access

Effects of multiple ion species on two-dimensional trapped-electron modes

Description: Previous calculations for the two-dimensional spatial structure of drift and trapped-electron modes in tokamaks are generalized to include an arbitrary number of ion species. Thus, it is possible to determine the influence of light or heavy impurity ions, and of multiple hydrogen isotopes, on these instabilities. As an example, results are presented for the case of a single light impurity species. Here the effect is found to be either stabilizing or destabilizing, depending on specific paramete… more
Date: March 1, 1980
Creator: Rewoldt, G.; Tang, W.M. & Frieman, E.A.
Partner: UNT Libraries Government Documents Department
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Lunar radionuclide records of average solar-cosmic-ray fluxes over the last ten million years

Description: Because changes in solar activity can modify the fluxes of cosmic-ray particles in the solar system, the nature of the galactic and solar cosmic rays and their interactions with matter are described and used to study the ancient sun. The use of cosmogenic nuclides in meteorites and lunar samples as detectors of past cosmic-ray variations are discussed. Meteorite records of the history of the galactic cosmic rays are reviewed. The fluxes of solar protons over various time periods as determined f… more
Date: March 21, 1980
Creator: Reedy, R. C.
Partner: UNT Libraries Government Documents Department
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