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in subjects: "Hadrons"  
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Clonal theory of radiation carcinogenesis

Description: In some cases, usually involving high-LET radiations, the dose response at low doses follows a power function of dose with exponent less than one over a wide dose range. This type of response is of great interest since (a) it implies greater effect per unit dose at progressively smaller doses, and (b) it is not predicted by most models and theories of radiobiology. A theoretical framework is presented for responses having the above characteristics over a dose range extending over a factor of 10… more
Date: January 1, 1982
Creator: Baum, J.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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New fission-neutron-spectrum representation for ENDF

Description: A new representation of the prompt fission neutron spectrum is proposed for use in the Evaluated Nuclear Data File (ENDF). The proposal is made because a new theory exists by which the spectrum can be accurately predicted as a function of the fissioning nucleus and its excitation energy. Thus, prompt fission neutron spectra can be calculated for cases where no measurements exist or where measurements are not possible. The mathematical formalism necessary for application of the new theory within… more
Date: April 1, 1982
Creator: Madland, D.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiation standards and calibrations. FY-1981 annual report

Description: The research program encompasses: reviewing calibration standards, regulations, and handbooks; assuring that calibration procedures used are in agreement with technically accepted methods; maintaining basic radioactive sources and instruments that serve as radiological standards; and providing traceability to the National Bureau of Standards where possible. In addition, major efforts are being expended to upgrade the 318 calibration facility. This report focuses on major accomplishments during … more
Date: July 1, 1982
Creator: Roberson, P. L.; Yoder, R. C.; Fox, R. A.; Hooker, C. D.; Hogan, R. T.; Holbrook, K. L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Boron thermal/epithermal neutron capture therapy

Description: The development of various particle beams for radiotherapy represents an attempt to improve dose distribution, and to provide high LET radiations which are less sensitive to ambient physical and radiobiological factors such as oxygen tension, cell cycle, and dose rate. In general, a compromise is necessary as effective RBE is reduced in order to spread the dose distribution over the anticipated tumor volume. The approach of delivering stable non-toxic isotopes to tumor, and then activating thes… more
Date: January 1, 1982
Creator: Fairchild, R.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production of the doubly strange H dibaryon

Description: There is much current interest in the spectroscopy of multiquark states. Predictions abound for the existence of baryonium (Q/sup 2/ anti Q/sup 2/) and six-quark dibaryon (Q/sup 6/) resonances, for instance. In the strangeness S = -2 sector of Q/sup 6/, the MIT bag model predicts a dibaryon H with quantum numbers J/sup ..pi../ = 0/sup +/, isospin I = 0, and mass M/sub H/ approx. = 2150 MeV approx. = 2M/sub ..lambda../ -80 MeV. The H has quark composition uuddss, so all quarks can occupy the ls … more
Date: January 1, 1982
Creator: Aerts, A.T. & Dover, C.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Average neutronic properties of prompt fission products

Description: Calculations of the average neutronic properties of the ensemble of fission products producted by fast-neutron fission of /sup 235/U and /sup 239/Pu, where the properties are determined before the first beta decay of any of the fragments, are described. For each case we approximate the ensemble by a weighted average over 10 selected nuclides, whose properties we calculate using nuclear-model parameters deduced from the systematic properties of other isotopes of the same elements as the fission … more
Date: February 1, 1982
Creator: Foster, Jr. D. G. & Arthur, E. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-sensitivity transuranic waste assay by simultaneous proton and thermal-neutron interrogation using an electron linear accelerator

Description: Simultaneous photon and neutron interrogation from electron linear accelerator pulses is used as the basis for a unique assay technique for transuranics. Both prompt and delayed neutrons from the induced fissions are counted on a single detection system, and the contributions from each interrogating flux are resolved. Detection limits (3 sigma) for /sup 239/Pu were estimated to be 3 mg for prompt fission neutrons and 6 mg for delayed neutrons. The technique also provides a clear distinction bet… more
Date: January 1, 1982
Creator: Franks, L. A.; Pigg, J. L.; Caldwell, J. T.; Cates, M. R.; Kunz, W. E. & Noel, B. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production of. gamma. ,. pi. /sup 0/ and eta at large transverse momenta

Description: A measurement of direct photon production, as well as of ..pi../sup 0/ and eta meson production, has been performed at Fermilab. Data were taken for 200 GeV/c p and ..pi../sup +/ incident on Be, C and Al targets. The ratio of ..gamma../..pi../sup 0/ inclusive cross sections is presented for transverse momenta between 2 and 5 GeV/c.
Date: January 1, 1982
Creator: Biel, J.; Bromberg, C. & Brown, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sensitivity study of neutron transport through standard and rebar concrete

Description: An investigation is under way at ORNL to (1) develop a data base pertinent to the transport of neutrons through thick concrete shields, (2) use the data base in an energy group boundary selection and collapsing scheme, and (3) develop a simple methodology to access the data base to provide rapid solutions to practical shielding problems. This paper describes work carried out to fulfill objective (1), the work consisting of calculations of the transport of fission neutrons through 1- and 2-m-thi… more
Date: January 1, 1982
Creator: Bhuiyan, S. I.; Roussin, R. W. & Lucius, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experimental evaluation of the differential die-away pulsed-neutron technique for the fissile assay of hot irradiated fuel waste

Description: Hot irradiated fuel waste packages containing self neutron sources up to 10/sup 7/ n/s may be assayed successfully with a 25-mg /sup 239/Pu detection sensitivity using a differential die-away fissile assay system based on a Sandia-designed 14-MeV neutron generator. With a minor design change, our system can accommodate contact gamma dose rates up to 10/sup 4/ R/h with no loss of fissile assay sensitivity.
Date: January 1, 1982
Creator: Caldwell, J.T. & Kunz, W.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fate of corrosion products released from stainless steel in marine sediments and seawater. Part 3. Calcareous ooze

Description: The physicochemical forms and partitioning of corrosion products released from stainless steel upon exposure to selected environmental conditions is the subject of this investigation. This report describes the influence of calcareous sediment on the rate of release and fate of corrosion products produced when neutron-activated stainless steel specimens were exposed to a Globigerina ooze taken from the Northeast Pacific Ocean. The calcareous ooze used in this study consists largely of planktonic… more
Date: April 1, 1982
Creator: Schmidt, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Annual environmental monitoring report of the Lawrence Berkeley Laboratory, 1981

Description: Results for 1981 of the LBL Environmental Monitoring Program are given. Data include monitoring results for accelerator-produced radiation, airborne and waterborne radionuclides, and nonradioactive pollutants. Population doses resulting from LBL operations are given in terms of accelerator-produced and airborne radioactivities. Trends in the environmental impacts of LBL operations are discussed in terms of accelerator-produced, airborne, and waterborne radionuclides. (ERB)
Date: June 1, 1982
Creator: Schleimer, G.E. (ed.)
Item Type: Refine your search to only Report
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.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Number of detectable kaon decays at LAMPF II

Description: The maximum number of kaon decays detectable at LAMPF II is estimated for both in-flight and stopping decays. Under reasonable assumptions, the momentum of the kaon beam that optimizes the decay yield occurs at about 6 GeV/c and 600 MeV/c for in-flight and stopping decays, respectively. K/sup +/ decay yields are fo the order of 7 x 10/sup 7/ per 10/sup 14/ interacting with K/sup -/ yields being typically 5 times less. By measuring decays from such beams, a statistical limit of 10/sup -15/ on a … more
Date: April 1, 1982
Creator: Sanford, T.W.L.
Item Type: Refine your search to only Report
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 here combined with epidemiologic data from the A-bomb survivors and examined radiobiologically 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 i… more
Date: April 30, 1982
Creator: Dobson, R.L. & Straume, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Differential cross sections of the reaction /sup 4/He(t,n)/sup 6/Li between 8. 5 and 16. 5 MeV and the n-/sup 6/Li cross-section standard

Description: Differential cross sections of the reaction /sup 4/He(t,n)/sup 6/Li, including some data of the first and second excited states of /sup 6/Li, were measured and compared with an R-matrix analysis of previous data in the /sup 7/Li system. Excellent agreement is observed for the angular distribution at the 0.24-MeV resonance of n-/sup 6/Li, and the shape of the angular distribution for /sup 4/He(t,n/sub 1/)/sup 6/Li at 12.9 MeV is predicted qualitatively by the R-matrix analysis. However, for neut… more
Date: January 1, 1982
Creator: Drosg, M.; Drake, D.M.; Hardekopf, R.A. & Hale, G.M.
Item Type: Refine your search to only Report
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.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mechanism of light-particle emission

Description: A general overview of the field of high-energy nuclear collisions studied from light particle spectra, pions, kaons, lambdas, protons, deuterons, and light composite fragments is given. Specifically, the basic reaction mechanism that determines the main features of particle emission such as the energy and angular distributions, the multiplicity, the production rate, the projectile and target mass dependences, the beam-energy dependences, etc. are discussed. Very general features of high-energy … more
Date: February 1, 1982
Creator: Nagamiya, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mammary carcinogenesis in rats: basic facts and recent results in Brookhaven

Description: Some research results from experiments investigating neutron-induced mammary carcinogenesis in rats are presented. The additive effects of neutrons and 3-methylcholanthrene on mammary adenocarcinoma were determined. Synergism between diethylstilbestrol and neutrons was likewise studied. Differences in mammary neoplastic response between strains of laboratory rats was also investigated. (ACR)
Date: January 1, 1982
Creator: Shellabarger, C.J.; Stone, J.P. & Holtzman, s.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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