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Heavy-Ion Elastic Scattering

Description: The elastic scattering of C/sup 12/ ions from Ar, Fe, Ni, Ag/sup 107/ In, and Ta was measured as a function of angle, at a laboratory-system energy of 124.5 Mev with the Berkeley heavy-ion linear accelerator. The experimental equipment and techniques are discussed. The angular distributions show the same general behavior as previous heavy-ion elastic scattering experiments. The experimental data were analyzed with the semiclassical Blair model as modified by McIntyre. Very good agreement with experiment was obtained. The measurements were taken with 1% statistics in order to study the structure of the angular distributions in greater detail, because only by fitting the details in the structure was it possible to obtdin unambiguous sets of parameters. The parameters indicated a nuclear radius of 1.45A/sup 1/3/ x 10/sup -13/ cm, and a nearly constant surface thick ness of 1.6 x 10/sup -13/ cm. Total reaction cross sections were obtained. A rainbow-model analysis by Goldman of the data is given. Existing alpha - and heavy-ion scattering data were analyzed with the McIntyre model and compared with previous optical-model analyses of the same data. It was found that, by independent analysis, the two models give the same imaginary phase shifts for all partial waves. The real phase shifts are identical above a certain lth partial wave, but differ widely below this 1 value. It is shown that in the region of disagreement the real part of the phase shifts is irrelevant to the calculation of the cross section. (auth)
Date: April 17, 1961
Creator: Alster, Jonas
Partner: UNT Libraries Government Documents Department
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THE Epsilon*/Lambda BRANCHING RATIO OF Y*1

Description: Recently a T = 1 resonance in the {Lambda}{pi} system called Y*{sub 1} has been observed with a mass of 1385 Mev. Two types of resonances have been predicted that might relate this observation to other elementary-particle interactions: (1) P 3/2 resonances in the {Lambda}{pi} and {Sigma}{pi} systems predicted by global symmetry corresponding to the (3/2, 3/2) resonance of the {pi}N system; (2) a spin-1/2 Y-{pi} resonance resulting from a bound state in the KN system. The position and width of the observed Y*{sub 1} resonance agree with both theories, but since the spin and parity have not yet been determined, it is impossible at present to distinguish between the two theoretical interpretations.
Date: April 25, 1961
Creator: Alston, Margaret H.; Alvarez, Luis W.; Eberhard, Philippe; Good,Myron L.; Graziano, William; Ticho, Harold K. et al.
Partner: UNT Libraries Government Documents Department
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EVIDENCE FOR A T = 0 RESONANCE IN THE V * SYSTEM

Description: In previous letters the authors have reported a {Sigma}{pi} resonance observed through the study of the interaction of 1.15-Bev/c K{sup -} meons in hydrogen in the Lawrence Radiation Laboratory 15-in. bubble chamber. They now wish to report the results of the study of the three reactions: (1) K{sup -} + p {yields} {Sigma}{sup +} + {pi}{sup -} + {pi}{sup -} + {pi}{sup +}; (2) K{sup -} + p {yields} {Sigma}{sup -} + {pi}{sup +} + {pi}{sup +} + {pi}{sup -}; and (3) K{sup -} + p {yields} {Sigma}{sup 0} + {pi}{sup 0} + {pi}{sup +} + {pi}{sup -}. Although reactions (1) and (2) are readily identified and measured, reaction (3) cannot be identified unambiguously. Accordingly, they discuss first the results pertaining to reactions (1) and (2). Nineteen events of type (1) and 13 events of type (2) were observed, corresponding to cross sections of 0.19 {+-} .06 and 0.12 {+-} .05 mb, respectively. In a search for possible {Sigma}{pi} resonances, they have plotted in Figure 1 histograms of the invariant masses of the {Sigma} and each of the three pions in reactions (1) and (2). Figure 1b refers to the {Sigma} and pion of like charge; Figure 1a to the {Sigma} and each of the pions of unlike charge. Since there are two unlike-charged pions in each event, twice as many points appear in Figure 1a as in Figure 1b. The plotted curves are mass distributions expected on the basis of a uniform phase-space population. The histogram of Figure 1b agrees with the phase-space curve, but the {Sigma} and unlike-charged pion distribution appears to exhibit an anomaly, suggesting a concentration of events with a ({Sigma}{pi}) mass of about 1405 Mev. To explore this anomaly in more detail, they use the following representation of the data. Since, according to Figure 1b, …
Date: April 28, 1961
Creator: Alston, Margaret H.; Alvarez, Luis W.; Eberhard, Philippe; Good,Myron L.; Graziano, William; Ticho, Harold K. et al.
Partner: UNT Libraries Government Documents Department
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Southwest Retort, Volume 13, Number 8, April 1961

Description: This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community. Published monthly during long academic semesters.
Date: April 1961
Creator: American Chemical Society. Dallas/Fort Worth Section.
Partner: UNT Libraries
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Air blast studies with animals. Part II.

Description: Goats under Nembutal and mice were exposed in a shock tube modified to give longer-duration overpressures and equipped with ports for photography. Except for ear damage, displacement still seemed to be the major cause of injury in goats in the 4-foot section of the tube. However, it was found that mice were killed, apparently by pure blast, in a particular position in a particular type of side chamber attached to the higher-pressure, smaller-diameter, section of the tube. The relation between maximum velocity of displacement and the distance animals were thrown was fairly regular. The probability of injury over different terrains is discussed. (auth)
Date: April 1, 1961
Creator: Anderson, R. S.; Stemler, F. W. & Rogers, E. B.
Partner: UNT Libraries Government Documents Department
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PHYSICS ANALYSIS OF PROPOSALS FOR EBWR CORE 2

Description: Two concepts were investigated as possibilities for the next loading of EBWR. One is a light water spiked plutonium recycle system; the second is a conventional uniformly loaded system with the option of different enrichments in two radial zones. It is concluded that the plutonium recycle scheme is not feasible in EBWR at 100 Mw, and recommendation for a two-enrichment loading for various burnups is made. (auth)
Date: April 1, 1961
Creator: Avery, R. & Kelber, C.N.
Partner: UNT Libraries Government Documents Department
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RECOVERY OF Np-237 BY AN OXIDATION-REDUCTION FLUORIDE PRECIPITATION METHOD

Description: Several hundred grams of Np/sup 237/ in nitric acid solution was approximately 95% recovered as NpO/sub 2/ of >99.5% purity. The remaining 5% was recovered as a nitric acid solution of 99.95% purity. The neptunium was oxidized to the soluble +6 state with sodium bromate, and Pu(IV), thorium, and other impurities in the solution were precipitated as fluorides. The neptuninum was then reduced to Np(IV)) with sulfur dioxide and precipitated as KH/sub p/F/sub 5/ , dissolved in nitric acid, precipitated as neptunium oxalate, and calcined to the oxide. The recovered material balance was 99.91% with a process loss of 0.09%. (auth)
Date: April 1, 1961
Creator: Baybarz, R.D.
Partner: UNT Libraries Government Documents Department
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Gamma-ray scanning techniques for fast breeder reactor safety studies

Description: A radiation scanning device was constructed to observe meltdown of fast breeder reactor fuel elements in the TREAT reactor by means of self gamma emission. Although the original desired specification was to view natural uranium pins with a space resolution of 0.1 in. and a time resolution of 1 millisecond, the system was designed to give the above space resolution, but the time resolution would be 5 milliseconds or longer depending on the signal intensity. The system failed to give satisfactory pictures because of low signal strength which gave poor contrast against high-strength background from the container required for safety reasons. Measurements indicated that a Mark III system could be constructed to view enriched pins in the standard container with a space resolution of 0.15 in. horizontally and 0.75 in. vertically with a time resolution of 5 milliseconds. (auth)
Date: April 1, 1961
Creator: Beach, L. A.; Pieper, A. G. & Young, M. P.
Partner: UNT Libraries Government Documents Department
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Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement

Description: Report discussing variations in comparative tests of portland cements that could lead to the rejection of a material fully conforming to specification requirements, or the acceptance of a material with undesirable chemical or physical properties. Many of the causes for variation in chemical analyses and physical test results are listed in this discussion, and remedies for some of the more frequently encountered deficiencies in apparatus and methods are suggested.
Date: April 27, 1961
Creator: Bean, B. Leonard & Dise, John R.
Partner: UNT Libraries Government Documents Department
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Runaway Analysis for a Gas Cooled Reactor

Description: From abstract: "This report presents an IBM digital computer program that solves numerically and simultaneously the equations that describe gross reactor behavior under runaway conditions."
Date: April 1961
Creator: Becker, Richard A.
Partner: UNT Libraries Government Documents Department
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Observations on the Response of a Lithium-Drifted Detector Protons

Description: The response of a lithium-drifted solid state detector was measured for protons and found to be linear up to the highest energy observed, 13.2 Mev. The resolution observed for these protons is 0.81% with a bias of 500 volts and 0.65% with a bias of 250 volts. (auth)
Date: April 18, 1961
Creator: Benveniste, J.; Booth, R. & Mitchell, A. C.
Partner: UNT Libraries Government Documents Department
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Summary of the APDA Fuel Development Programs

Description: Report issued by the APDA over fuel development programs. Designs for fast breeder reactors, safety tests, and methods are presented and discussed. This report includes tables, illustrations, and photographs.
Date: April 1961
Creator: Blessing, W. G.; Busch, J. S.; Duffy, J. G.; Hennig, R. J.; Jens, W. H.; Knight, F. W. et al.
Partner: UNT Libraries Government Documents Department
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Summary of the Apda Fuel Development Programs

Description: A summary is presented of the development status, through 1960, of work done on: Core A, the U--10 wt.% Mo fuel and U--3 wt.% Mo blanket, and Core B, the U0/sub 2/--SS cermet and the UO/sub 2/ axial blanket for the Fermi Fast Breeder Reactor; advanced fast reactor fuels; and paste fuels. (B.O.G.)
Date: April 1, 1961
Creator: Blessing, W. G.; Busch, J. S.; Duffy, J. G.; Hennig, R. J.; Jens, W. H.; Knight, F. W. et al.
Partner: UNT Libraries Government Documents Department
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Brookhaven National Laboratory Annual Report: 1960

Description: Report issued by the Brookhaven National Laboratory discussing the work conducted by the lab during the fiscal year of 1960. As stated in the introduction, "the progress and trends of the research program are presented together with a description of the operational, service, and administrative activities of the Laboratory" (p. vii). This report includes tables, illustrations, and photographs.
Date: April 1961
Creator: Brookhaven National Laboratory
Partner: UNT Libraries Government Documents Department
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gem-Bis(disubstitutedphosphinyl)alkanes. II. Extraction Properties of Bis(di-n-hexlphosphinyl)methane

Description: From abstract: "Bis(di-n-hexylphosphinyl)methane, HDPM, [(C6H13)2P(O)]2CH2, has been studied as an extractant for a variety of metals. HDPM was evaluated as an extractant for uranium(VI) and compared with tri-n-octylphosphine oxide, TOPO, (C8H13)3PO. In nonpolar solvents, HDPM forms a polymeric-like substance with compounds of uranium(VI). Viscosity measurements indicate that the molecular weight of this polymeric-like substance is about 100 times greater than the corresponding complex with TOPO. Polymer formation occurs only when nonpolar solvents are used as diluents for HDPM and is easily avoided by using polar solvents such as 1,2-aichlorobenzene. HDPM forms 1:1 and 2:1 complexes with uranium(VI) nitrate. Equilibrium constants for these complexes as well as that for the 2:1 TOPO complex were calculated and it was shown that the over-all constant is at least ten times larger for the HDPM complex than for the TOPO complex. The effect of concentration of various mineral acids, extractant concentration, temperature, and diluents on the extraction of uranium are discussed."
Date: April 11, 1961
Creator: Burke, Keith E.; Sakurai, Hiroshi; O'Laughlin, Jerome W. & Banks, Charles V.
Partner: UNT Libraries Government Documents Department
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Experimental Evaluation of the Radiation Protection Provided by an Earth- Covered Shelter

Description: against fall-out radiation provided by an earth-covered shelter. The study indicated that the shelter offered excellent protection from fall-out radiation deposited on and around the shelter. This study also added additional data to the research in radiation shielding provided by various structures which is being conducted by the Civil Effects Test Operations, Division of Biology and Medicine, U. S. Atomic Energy Commission. A fall-out radiation field was simulated by pumping, at constant speed, a sealed Co/sup 60/ source through a long length of tubing which was evenly distributed over an area. Radiation measurements were made inside the shelter by dose-integrating ionization chambers. In general, the results indicated that the protection factor (ratio of the open- field exposure dose rate to the exposure dose rate in the structure) was approximately 5000 in the center of the shelter, increasing to 10,000 to 15,000 along the sides, and decreasing to about 3000 near the ends. Directly below vents the protection factor was found to be approximately 2500 at the 3-ft level. The shelter was a halfround corrugated-steel structure covered by a minimum of approximately 2 ft of earth on the top and 5 to 7 ft of earth on the sides. (auth)
Date: April 1, 1961
Creator: Burson, Z. & Borella, H.
Partner: UNT Libraries Government Documents Department
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PCCF flow analysis -- DR Reactor

Description: This report contains an analysis of PCCF tube flow and Panellit pressure relations at DR reactor. Supply curves are presented at front header pressures from 480 to 600 psig using cold water and the standard 0.236 inch orifice with taper down stream and the pigtail valve (plug or ball) open. Demand curves are presented for slug column lengths of 200 inches to 400 inches using 1.44 inch O.D. solid poison pieces (either Al or Pb-Cd) and cold water with a rear header pressure of 50 psig. Figure 1 is a graph of Panellit pressure vs. flow with the above supply and demand curves and clearly shows the effect of front header pressure and charge length on flow.
Date: April 26, 1961
Creator: Calkin, J. F.
Partner: UNT Libraries Government Documents Department
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In-tank solidification of intermediate-activity wastes

Description: Solidification of intermediate-activity wastes is a major goal of the CPD Waste Management Program. Plans are to reduce the wastes, by evaporation, to salt cakes in existing tanks, thereby insuring safe, long-term storage of contained fission products regardless.of tank integrity. Initiation of these plans at an early date is necessary to offset the expected increase in tank failures and to provide space for future wastes. Major decisions of the program relate to selection of the evaporative method to be employed. The requirements of in-tank solidification were therefore reviewed to determine if the choice of evaporative systems can be made at this time. The relative potential of Bentube evaporation and submerged combustion for meeting these requirements were analyzed on the basis of available information, including actual performance of the Bentube facility at the Savannah River Plant (SRP).
Date: April 3, 1961
Creator: Campbell, B. F.
Partner: UNT Libraries Government Documents Department
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Production test IP-350-C, E-N demonstration load at H Reactor (Part 2, Flattened zone striped loading)

Description: The objective of this production test is to demonstrate the feasibility of a Hanford reactor operating economically as a plutonium-tritium producer to increase the over-all conversion ratio and diversify the useful product output.
Date: April 4, 1961
Creator: Carter, R. D.
Partner: UNT Libraries Government Documents Department
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Cesium-137 Research Irradiator

Description: Abstract: A 12,000 curie cesium-137 research irradiator has been designed and installed on the Georgia Tech campus. The evaluation of the physical characteristics of the irradiator has been completed.
Date: April 20, 1961
Creator: Carter, R. W.; Palmer, R. C. & Willis, W. V.
Partner: UNT Libraries Government Documents Department
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