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Progress with the superHILAC

Description: No Description Available.
Date: March 1, 1973
Creator: Ghiorso, A.
Partner: UNT Libraries Government Documents Department

Curium-244 heat source fabrication

Description: No Description Available.
Date: January 1, 1973
Creator: Lamb, E.; Albertson, D.G. & Brown, P.
Partner: UNT Libraries Government Documents Department

Utilization of integral experiments and related data in LMFBR designs

Description: From IAEA conference on physics of fast reactors; Tokyo, Japan (16 Oct 1973). Detailed analyses of plate versus pin measurements of reactivity, sodium void, reaction rate ratio, and doppler effect are presented. The measurements were performed in pin and plate environments of nearly identical composition in ZPPR-2 and ZPR-6-7. An improved capability for calculating plate versus pin effects will improve the applicability of plate critical assembly data in LMFBR design. (JWR)
Date: January 1, 1973
Creator: Dyos, M.W. & Paik, N.C.
Partner: UNT Libraries Government Documents Department

A$sub 1$, A$sub 2$, and A$sub 3$ production in $pi$$sup -$p $Yields$ $pi$$sup -$$pi$$sup -$$pi$$sup +$p at 25 and 40 GeV/c

Description: A sample of ~70,000 fitted events of the reaction pi /sup -/p yields pi /sup -/ i/sup -/ pi /sup +/p at 25 and 40 GeV/c was obtained with the CERN-WEP Boson Spectrometer at the Serpukhov Accelerator. A partial-wave analysis shows that: A/sub 1/ and A/sup 3/ cannot be described by a Breit--Wigner amplitude; the A/sub 2/ can be well described by a Breit--Wigner amplitude; although A/sup 1/, A/ sup 3/, and A/sup 2/ have different properties, the e nergy dependence of their production cross section is similar. (auth)
Date: January 1, 1973
Creator: Antipov, Yu.M.; Ascoli, G.; Busnello, R.; Kienzle-Focacci, M.N.; Kienzle, W.; Klanner, R. et al.
Partner: UNT Libraries Government Documents Department

Compact cyclotron neutron dosimetry

Description: No Description Available.
Date: January 1, 1973
Creator: Laughlin, J.S.; Canada, T.R.; Simpson, L.D.; McDonald, J.C.; Kuo, T.Y.T. & Mittleman, A.
Partner: UNT Libraries Government Documents Department

Multinucleon transfer reactions

Description: The development of higher energies and better resolution in heavy-ion beams has led to a resurgence of interest in transfer reactions at energies well above the Coulomb barrier. Direct reactions with heavy ions are discussed in some detail. Heavy-ion reactions open up the possibility of new methods of spectroscopy, e.g., elastic transfer. Differential cross sections for heavy-ion ' transfer reactions are often featureless; however, some data show diffractive effects. The high angular momenta associated with recoil effects in heavy-ion reactions can be exploited to perform selective spectroscopy on light nuclei. Although most heavy-iontransfer data suggest that reactions proceed in a direct fashion, recent experiments indicate the presence of second-order multistep processes. Correlated nucleon transfer and transfer of many nucleons (e.g., (12C, alpha )) are also being investigated. (20 figures, 3 tables, 93 references) (RWR)
Date: August 1, 1973
Creator: Scott, D.K.
Partner: UNT Libraries Government Documents Department

Research applications of synchrotron radiation. Proceedings of a study- symposium held at Brookhaven National Laboratory, September 25--28, 1972

Description: The conference covers biological diffraction, x-ray diffraction in biology, protein structure determination by diffraction, x-ray microscopy, uv absorption studies on biophysical systems, biological responses to ionizing radiations, holography, far ultraviolet photochemistry, free atoms and molecules, x-ray astronomy. (JFP)
Date: June 1, 1973
Creator: Watson, R.E. & Perlman, M.L. (eds.)
Partner: UNT Libraries Government Documents Department

Californium-252: neutron source for industry and medicine

Description: From eleventh conference on radioisotopes; Tokyo, Japan (13 Nov 1973). The history, production, and availability of /sup 252/Cf and its many potential uses are discussed. Applications in life sciences, education chemical analysis, exploration for natural resources, industrial process control, neutron radiography, nondestructive inspection, and neutron flux enhancement are described. (TFD)
Date: January 1, 1973
Creator: Reinig, W.C.; Permar, P.H. & Cornman, W.R.
Partner: UNT Libraries Government Documents Department

HTGR fuel performance in the Peach Bottom Reactor

Description: From conference on reactor operating experience; Myrtle Beach. South Carolina, USA (5 Aug 1973). The Peach Bottom Reactor has operated very reliably with the Core 2 loading since startup in July 1970. High temperature operation of test elements containing fuel for larger HTGR plants has been an important part of Peach Bottom operation. Details of the Core 2 and test element performance are presented. (14 references) (auth)
Date: July 1, 1973
Creator: Turner, R.F.; Burnette, R.D. & Scheffel, W.J.
Partner: UNT Libraries Government Documents Department

Electron-beam-controlled lasers: discussion from the engineering viewpoint. Part I. Design of the 1 kJ and 10 kJ CO$sub 2$ lasers

Description: The Los Alamos Scientific Laboratory (LASL) CO/sub 2/ laser program was organized to design, fabricate, and evaluate highenergy, short-pulse CO/sub 2/ lasers for use in fusion studies. A general discussion of electron-beam- controlled lasers is included, along with details of component designs. This includes a discussion of the high-voltage pulsers, electron guns, pumping chamber vessels, timing, and operational experience with the 1-kJ CO/sub 2/ laser system components. In addition, the general design of the 10-kJ C0/sub 2/ laser system is presented. (auth)
Date: January 1, 1973
Creator: Stapleton, R.E.; Riepe, K.B.; Jolly, E.L. Jr.; Weinbrecht, J.; Hayden, J.J.; Ferdinand, E.O. et al.
Partner: UNT Libraries Government Documents Department

Calculation of fission barriers

Description: No Description Available.
Date: August 1, 1973
Creator: Moeller, P. & Nix, J.R.
Partner: UNT Libraries Government Documents Department

Talk to be presented at Gordon Conference, Tilton, N.H., August 22, 1973, Garching Lab., Germany, Lemiel Lab., France, and Culham Lab., England, September 1973

Description: From Gordon Conference; Tilton. New Hampshire, USA (22 Aug A brief discussion of magnetic field generation in laser-pellet interactions is given. Proposed target experiments to study these interactions are described in detail. Some data from typical laser--pellet interactions are theoretically derived. The data are given for various experimental parameters. (MOW)
Date: July 30, 1973
Creator: Bodner, S.E.
Partner: UNT Libraries Government Documents Department

Fusion reactors as future energy sources

Description: From conference on energy policies and the international system; New, Delhi, India (4 Dec 1973). The need is now apparent for a global energy policy with the following characteristics: Compatibility with environmental and economic factors; large fuel resources, the recovery and exploration of which have minimal environmental impact and which do not introduce disturbing factors into the world political situation. Fusion power in this context is discussed, including assessments of its potential and of the problems yet to be solved in achieving its realization. The proposition is advanced that fusion should be considered as the ultimate source of energy, and that other sources of energy, including conventional nuclear power, should be considered as interim sources. (auth)
Date: January 1, 1973
Creator: Post, R.F. & Ribe, F.L.
Partner: UNT Libraries Government Documents Department

Portal monitor for diversion safeguards

Description: Two prototype doorway monitors to deter the diversion of special nuclear materials have been designed and constructed. One prototype utilizes plastic scintillators while the other contains NaI (Tl) detectors. Both prototypes utilize a unique digital, sliding interval, warning logic module. Features of these two systems are described and their sensitivity for detection of /sup 235/ U, /sup 239/Pu and /sup 238/U are presented. (auth)
Date: January 1, 1973
Creator: Sampson, T.E.; Fehlau, P.E.; Worth, G.M. & Henry, C.N.
Partner: UNT Libraries Government Documents Department

Measured chromium distributions resulting from cooling tower drift

Description: Useful data concerning the distribution of drift from a mechanical draft cooling tower were derived from field measurements despite the non-ideal conditions which were encountered. Observed chromium fluxes ranged from about 1 mg (m/sup 2/hr)/sup -1/ at a distance of 30 m from the tower to about 1% of that value at a kilometer. Air concentrations of chromium were fairly constant at about 50 ng m/sup -3/ to a distance of about 200 m downwind of the tower, apparently due to thorough mixing in the wake of the tower and a lack of lateral dilution of the effiuent from a crosswind line source. A simplified droplet trajectory model appears capable of estimating drift deposition flux within an order of magnitude. Neither that model nor the experimental data are sufficiently detailed to permit definitive assessment of cooling tower drift. The proper assessment of cooling tower drift deposition for general application would require a comprehensive investigation centered on an isolated cooling lower whose operational characteristics are well-defined and subject ulo cont rol. Documentation of the drift droplet spectrum and properties of the buoyant plume and the adjacent atmosphere are essential to such an effont. (auth)
Date: January 1, 1973
Creator: Alkezweeny, A.J.; Glover, D.W.; Lee, R.N.; Sloot, J.W. & Wolf, M.A.
Partner: UNT Libraries Government Documents Department

Detection systems for the low-level radiochemical analysis of iodine-131, iodine-129, and natural iodine in environmental samples

Description: A procedure based on chemicsl separation techniques and activation anslysis was developed for the sequential analysis of low levels of /sup 131/I, / Sup 129/I, and natural iodine in environmental samples. The iodine is first separated from the samples by oxidation. The separated iodine is then counted by low-level, beta-gated gamma spectrometry for the measurement of /sup 131/I. The chemical yield for the separation is measured by means of /sup 125/I tracer. Activation analysis is used for measurement of the separated natural iodine (/sup 127/I) and /sup 129/I. The natural iodine is estimated from either the /sup 126/ I or /sup 128/I activity produced in the sample; the induced /sup 130/I is used to estimate the /sup 129/I concentration. The measurement of /sup 130/I at low levels requires specialized counting methods. Interfering activities that may be present in the irradiated sample include /sup 125/I, /sup 126/I, short-lived fission-product iodine activities produced by activation of uranium impurities, and /sup 82/Br from bromine impurities. Since /sup 130/I decays with several coincident gamma rays, multiple gamma coincidence counting techniques can be used to reduce background and discriminate against interfering activities. Severail three- and four-segmented NaI(Tl) detectors were used for these measurements and compared with other detector systems. The sensitivities for different coincidence counting modes were compared for several of the detector systems. Detection sensitivities achieved for /sup 131/I and /sup 129/I are 0.02 dpm and 10/sup -6/ dpm, respectively. Meaeurements have been made of iodine radioactivity in the environment at concentrations below the limits established for radiation protection purposes. (auth) Twelve papers were presented at the symposium and separate abstracts have been prepared for seven of them. Five of the papers were previously abstracted for NSA and appeared as 26: 25164,
Date: October 26, 1973
Creator: Brauer, F.P. & Kaye, J.H.
Partner: UNT Libraries Government Documents Department

Experiments with laser-produced plasmas: electrons, ions, and neutrons

Description: From third workshop on laser interaction and related plasma phenomena; Troy, New York, USA (13 Aug 1973). Experimental re sults, particularly x-ray bremsstrahlung and ion time-of-flight measurements, obtained from plasmas generated with a 10 J, 25 psec Nd:YAG-Nd:glass (1.06 mu m) laser delivering focal spot intensities of greater than 10/sup 16/ W/cm/sup 2/ are reviewed. Preliminary experiments with a 10 J, 1 nsec C0/sub 2/ (10.6 mu m) laser delivering ~ 10/sup 14/ W/cm/sup 2/ to a target are briefly discussed. Both sets of experiments yield high-energy (tens of keV) electrons and ions. Experimental evidence indicates that neutron emission can be explained by electron heating and a consequent ion acceleration. Therefore, neutron production in laser-produced plasmas can be a delusive diagnostic. (auth)
Date: January 1, 1973
Creator: Godwin, R.P.
Partner: UNT Libraries Government Documents Department