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Trafficability of Soils: A Summary of Trafficability Studies Through 1955

Description: Summary of trafficability studies conducted by the Waterways Experiment Station. It includes information about phase I tests related to "Soil Classification and Trafficability Data" as a sub-project of "Trafficability of Soils as Related to the Mobility of Military Vehicles" (published 1947-1955). It also includes initial results of phase II, "Soils Trafficability Predictions."
Date: December 1956
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department

Geography, Geology, and Water Resources of the National Reactor Testing Station, Idaho : Part 2, Geography and Geology

Description: Geologic factors in the physical environment of the National Reactor Testing Station control the amount and availability of the water supply, the methods and efficiency of obtaining water, and the behavior of waste materials that are disposed on the ground or beneath the land surface.
Date: 1956
Creator: Nace, R. L.
Partner: UNT Libraries Government Documents Department

Review of Soils Design, Construction, and Prototype Analysis: Blakely Mountain Dam, Arkansas

Description: This report provides a review of the design and performance of the embankment and foundation of Blakely Mountain Dam in Arkansas. "This study is one of a series of similar studies of the foundation and soil mechanics features of earth dams [...] In these studies field experience is analyzed and performance of the completed structures is compared with design predictions to provide information for use in the design and construction of future projects" (p. 1).
Date: October 1956
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department

Performance of Relief Wells Along Missouri River Levees: 1951-1952 Floods

Description: "The purpose of this report is to present the results of a study of the performance of the three relief well systems [along the Missouri River] during the July 1951 and April 1952 floods, and to compare their performance with design predictions. [...] The report includes observed uplift and well-flow data, descriptions of relief well operations during the floods, and an analysis of the effectiveness of the well systems together with discussion and comments on several experimental and test wells" (p. 2).
Date: December 1956
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department


Description: The applicability of the gas centrifuge to the separation of the isotopes of the elements from Ti through U was examined. The suitable elsments were determined, and their effects on required centrifuge characteristics were surveyed. The performance of cascades of various aires with different gages was explored, and the cost of a pilot plant program to develop basic separation data was estimated. (F.S.)
Date: September 30, 1956
Creator: Barker, J.J.
Partner: UNT Libraries Government Documents Department


Description: Methods are described for metallographic preparation of binary U alloys having small percentages of Mo, Nb, or Si. Details are given of mounting, attack- polish technique, and electrolytic etching. Photornicrographs are shown of sintered specimens of U--Mo and U--Nb and of a cast specimen of U--Si. (auth)
Date: February 15, 1956
Creator: Gross, J.
Partner: UNT Libraries Government Documents Department


Description: Argonne National Lab. Annealing experiments of highpurity C --U alloys in the gamma region in an Ar atmosphere show that the metal is subject to decarbinization. Fourteen binary U--Pd alloys were prepared and examined. Pd solubility in gamma U is less than 1 wt.% at 890 deg C. Seventeen binary alloys of U-Ru were prepared and examined in the as-cast condition. The corrosion resistance after irradiation of U--Si alloys was tested. Homogeneous U- -Ta alloys have not been obtained. Th-rich U alloys were found to be more stable under irradiation than the best U alloys. The effect of heat treatment on microstructure is being studied as part of the effort to understand the effect of alloying on corrosion resistance in Ti--U alloys. Crystal and corrosion studies on U--Zr alloys are reported. Armour Research Foundation. Small ternary additions were found to greatly affect the transformation characteristics of U-- Nb alloys, and a hardness change was noted for this alloy. Preliminary data for U--Nb--Zr alloy demonstrated a relationship between the strained matrix and the physical properties of the alloy. Battelle Memorial Institute. Phase relationships between the intermediate delta phases of the U--Mo and U--Ti systems were conducted. U--Zr, U--Mo, and U--Nb alloys were evaluated for use as high-temperature reactor fuels. The kinetics of the betato-epsilon decomposition of Zr--U alloys are being investigated. The mechanism of aqueous U corrosion is being studied. Mallinckrodt Chemical Works. In the production of Nb--U alloy by co-reduction there was an indication of insufficient heat. Thermal boosters and a redesigned bomb for improving heat conservation will be investigated. National Bureau of Standards. Experimental work on the U-- Pt system is completed. Thermal analyses on U--Pd alloys did not show the U transformations present. Metallographic examination revealed an apparently singlephase structure. Thermal analysis data were collected for U--Ru and ...
Date: November 1, 1956
Creator: Epremian, E. ed.
Partner: UNT Libraries Government Documents Department

General Geology of Central Cochise County, Arizona

Description: From abstract: This report describes the comprising the western two-thirds of the Pearce quadrangle and the eastern two-thirds of the Benson quadrangle of the Geological Survey's Topographic Atlas of the United States and includes about 1,400 square miles in the west-central part of Cochise County, Arizona.
Date: 1956
Creator: Gilluly, James
Partner: UNT Libraries Government Documents Department

The Catalysis of Nuclear Reactions by mu Mesons

Description: In the course of a recent experiment involving the stopping of negative K mesons in a 10-inch liquid hydrogen bubble chamber, an interesting new reaction was observed to take place. The chamber is traversed by many more negative {mu} mesons than K mesons, so that in the last 75,000 photographs, approximately 2500 {mu}{sup -} decays at rest have been observed. In the same pictures, several hundred {pi}{sup -} mesons have been observed to disappear at rest, presumably by one of the ''Panofsky reactions''. For tracks longer than 10 cm, it is possible to distinguish a stopping {mu} meson from a stopping {pi} meson by comparing its curved path (in a field of 11,000 gauss) with that of a calculated template. In addition to the normal {pi}{sup -} and {mu}{sup -} stoppings, we have observed 15 cases in which what appears (from curvature measurement) to be a {mu}{sup -} meson comes to rest in the hydrogen, and then gives rise to a secondary negative particle of 1.7 cm range, which in turn decays by emitting an electron. (A 4.1-Mev {mu} meson from {pi} - {mu} decay has a range of 1.0 cm.) The energy spectrum of the electrons from these 15 secondary particles looks remarkably like that of the {mu} meson. There are four electrons in the energy range 50 to 55 Mev, and none higher; the other electrons have energies varying from 50 Mev to 13 Mev. The most convincing proof that the primary particle actually comes to rest, and does not--for example--have a large resonant cross section for scattering at a residual range of 1.7 cm, is the following: In five of the 15 special events, there is a large gap between the last bubble of the primary track and the first bubble of the secondary track. This gap ...
Date: December 10, 1956
Creator: Alvarez, L.W.; Bradner, H.; Crawford Jr, F.S.; Crawford, J.A.; Falk-Vairant, P.; Good, M.L. et al.
Partner: UNT Libraries Government Documents Department

Example of an Antiproton-Nucleon Annihilation

Description: The existence of antiprotons has recently been demonstrated at the Berkeley Bevatron by a counter experiment. The antiprotons were found among the momentum-analyzed (1190 Mev/c) negative particles emitted by a copper target bombarded by 6.2-Bev protons. Concurrently with the counter experiment, stacks of nuclear emulsions were exposed in the beam adjusted to 1090 Mev/c negative particles in an experiment designed to observe the properties of antiprotons when coming to rest. This required a 132 g/cm2 copper absorber to slow down the antiprotons sufficiently to stop them in the emulsion stack. Only one antiproton was found in stacks in which seven were expected, assuming a geometric interaction cross section for antiprotons in copper. It has now been found that the cross section in copper is about twice geometric, which explains this low yield.
Date: February 27, 1956
Creator: Chamberlain, O.; Chupp, W.W.; Ekspong, A.G.; Goldhaber, G.; Goldhaber, S.; Lofgren, E.J. et al.
Partner: UNT Libraries Government Documents Department

Experiences with the Bevatron

Description: The Bevatron is still undergoing a process of gradual improvement to increase both the magnitude of the beam and the reliability. The operating conditions for optimum adjustment at the present stage of development are summarized.
Date: April 5, 1956
Creator: Lofgren, Edward J.
Partner: UNT Libraries Government Documents Department

Metabolism of Thioctic Acid in Algae

Description: Thioctic acid labeled with sulfur-35 has been prepared and i t s metabolism b y algae has been studied. It i s converted by the algae into a number of forms, all of which upon hydrolysis yield either the disulfide o r i t s sulfoxide. One of these constituted the major portion of the labeled material in the chloroplasts. Aerobic metabolism for some minutes i s required to produce this form. Preliminary studies of the chemical nature of this form suggest i t to be esterified on the carboxyl group with a moiety of very high lipid solubility.
Date: April 17, 1956
Creator: Grisebach, Hans; Fuller, R.C. & Calvin, M.
Partner: UNT Libraries Government Documents Department

The Electron Spin Resonance Spectrum of Dibenzene ChromiumCation

Description: The electron spin paramagnetic resonance of dibenzene chromium cation h a s been observed. I t s c e n t e r is a t a valhe of g = 1.98. I t shows eleven hyperfine components s e p a r a t e d by 3.5 gauss. These a r e i n t e r p r e t e d to b e eleven of the thirteen components expected to r e s u l t f r o m the interaction of the twelve equivalent protons with the unpaired electron.
Date: December 20, 1956
Creator: Feltham, Robert D.; Sogo, Power & Calvin, Melvin
Partner: UNT Libraries Government Documents Department

Notes on Quadrupole Focusing

Description: No abstract prepared.
Date: February 9, 1956
Creator: McMillan, Edwin M.
Partner: UNT Libraries Government Documents Department

Production of a Theta Degree Particle Without an AssociatedHyperon in a Pi-P Collision

Description: An event is described that is interpreted as evidence for the simultaneous production of a {theta}{sup 0} and a {bar {theta}}{sup 0} according to the scheme of Gell-Mann and Pais. This interpretation assumes the production of a normal {theta}{sup 0} and a K{sup 0} with no associated hyperon, where the {theta}{sup 0} is observed and the K{sup 0} is inferred from the rule of associated production of heavy unstable particles. The event was obtained by exposing a high-pressure diffusion cloud chamber to a 4. 5-Bev/c {pi}{sup -} meson beam from the Bevatron.
Date: February 29, 1956
Creator: Fowler, William B.; Maenchen, George; Wilson, Powell M.; Saphir,George & Wright, Robert W.
Partner: UNT Libraries Government Documents Department

K Interactions in Hydrogen

Description: No abstract prepared.
Date: November 14, 1956
Creator: Alvarez, Luis W.; Bradner, Hugh; Falk-Vairant, Paul; Gow, J.Donald; Rosenfeld, Arthur H.; Solmitz, Frank T. et al.
Partner: UNT Libraries Government Documents Department

Liquid Hydrogen Bubble Chambers

Description: After the first hydrocarbon bubble chambers were built by Donald Glaser in 1952, work was started at Chicago and Berkeley to find if liquid hydrogen could be used as the working fluid in a bubble chamber. In the fall of 1953, it was found by the Chicago group that superheated liquid hydrogen could be made to boil under the influence of ionizing radiation, but no tracks were observed. The observation of tracks at Berkeley a few months later completed the proof that hydrogen was a usable bubble chamber liquid. (Irradiated liquid nitrogen boils when superheated, but as of spring 1956 no one has seen tracks in liquid nitrogen.) In the past two years, the Chicago group has built several all-glass hydrogen chambers, the most recent of which is approximately 5.5 by 5.5 by 20 cm inside dimensions. Their chambers have been of the so-called clean variety (like Glaser's eariy ones), in which no boiling takes place unless ionizing particles aze present. They have used their latest chamber in an extensive study of the scattering of low-energy pions by protons.
Date: April 4, 1956
Creator: Alvarez, Luis W.
Partner: UNT Libraries Government Documents Department

Hindered Diphenoquinones: Diradicals of Oxygen

Description: Attempts were made to prepare a diphenoquinone having substituents in 2,2'-positions in order to prevent the planarity of the molecule and get a diradical of oxygen. The 2,2'-dimethyl-5,5'-di-t-butyldiphenoquinone was prepared and was shown to be in equilibrium with a small amount of diradical. This compound slowly polymerizes.
Date: July 10, 1956
Creator: Bourdon, Jean & Calvin, Melvin
Partner: UNT Libraries Government Documents Department

Spallation-Fission Competition in Heaviest Elements; Helium IonInduced Reactions in Plutonium Isotopes

Description: Excitation functions have been determined for the spallation and fission reactions induced in plutonium isotopes by 20 to 50 Mev helium ions. The method employed consisted of cyclotron bombardments of plutonium oxide followed by the chemical isolation and alpha or beta counting of radioactive reaction products. Formation cross sections are given where possible for the curium and americium spallation products corresponding to ({alpha},n), ({alpha},2n), ({alpha},3n), ({alpha},4n), ({alpha}5n), ({alpha},p), ({alpha},pn or d), ({alpha},p2n or t), and ({alpha},p3n) reactions in Pu{sup 238} , Pu{sup 239}, and Pu{sup 242}. Fission yield curves and fission cross sections for Pu{sup 238} and Pu{sup 239} serve to define the characteristics of the ({alpha},f) reaction for plutonium isotopes. Chemical procedures are outlined for the separation of both spallation and fission product elements in a sequence of operations performed on the entire dissolved target.
Date: June 1, 1956
Creator: Glass, Richard A.; Carr, Robert J.; Cobble, James W. & Seaborg,Glenn T.
Partner: UNT Libraries Government Documents Department

Sites of Azaserine Inhibition During Photosynthesis byScenedesmus

Description: The success attending the use of azaserine as a specific inhibitor of one atage in the metabolic pathway leading to the synthesis of inosinic acid in pigeon liver prompted us to use this antibiotic in a similar attack on purine synthesis in Scenedesmus. However, investigation of the products produced during photosynthesis by suspensions of these algae in the presence of azaserine showed that a more widespread interference with metabolism had occurred. The purpose of this communication is to describe the nature of these effects and to attempt to assess their importance in a general picture of the metabolic effects of azaserine.
Date: May 8, 1956
Creator: Barker, S. Alan; Bassham, James A.; Calvin, M. & Quarck, Ursula C.
Partner: UNT Libraries Government Documents Department

Absorption Spectra of Aromatic Disulfides

Description: The effect of solvents and temperature on the optical absorption spectrum of a number of substituted aromatic disulfides is reported. The problems offered by the disulfide link and the exchange reactions between disulfides, and between disulfides and thiols, are receiving increasing attention. Recently the base-catalyzed exchange between various alkyl disulfides and the corresponding thiols was studied by means of a radioactive-tracer technique. Our initial purpose was to extend these investigations to a large number of compounds in a variety of experimental conditions using a spectrophotometric technique that, if applicable, would have been incomparably faster.
Date: October 31, 1956
Creator: Fava, Antonio & Calvin, Melvin
Partner: UNT Libraries Government Documents Department