Results of torsion tests to determine the shear properties of plutonium are presented. Data on torsion properties are tabulated. (J.R.D.)

The effect of temperature on the unnotched and notched Charpy impact properties of plutonium was studied in the alpha, beta, gamma, and delta phases encompassing a temperature range of -43 to 330 deg C. Impact energies for unnotched specimens generally increased with increasing test temperature in the alpha and beta phases. Brittle failures were obtained in these phases. The specimen tested in the gamma phase did not fracture but bcnt in ofi U-shape and pulled through the anvil. lmpact energies for the Charpy V-notched specimens were much lower than for the unnotched spcc(mens.dt corresponding temperatures. Brittle failures were obtained in the alpha and beta phases; some ductility was evidenced in the gamma phase while the specimen tested in the delta phase did not fracture but bent in a U-shape. It was concluded that the beta phase is quite sensitive to both strain rate and notch effects. Fracture appearance in the alpha and beta phase is discussed from the standpoint of grain boundary effects and microcracking. (auth)

This report talks about the Application of Biometrical Genetic Techniques to Irradiated and Non- Irradiated Populations of Corn to Provide Information on Nature of Gene Action Involved in the Inheritance of Quantitative Traits and in Heterosis.

This is part of a series of reports that cover the study of 202 sites throughout the world providing data on rock and soil to a depth of 100 feet and on climatic conditions. This volume discusses locations in Europe, the U.S.S.R. and Southwest Asia.

Progress reports are presented for the following tasks: physical and mechanical metallurgy; plutonium fuels development; and special fabrication of plutonium and other radioactive materials.

None

The general and analytical chemistry of Ir are reviewed and applications to the radiochemistry of Ir are discussed. Topics covered include dissolution of samples containing Ir, counting techniques for radioactive Ir isotopes, radiochemical procedures for Ir radionuclides, and safety practices. A list is included of the radioactive nuclides of Ir. 106 references. (C.H.)

: : 7 : ; : = : : 9 ; 8 : ; / he use of organic liquids as reactor moderator-coolants is presented. A major part of the study was devoted to the mechanism of radiolytic damage to coolants. A mathematical treatment for handling information on the relative reactivity of different positions on an aromatic ring was developed in some detail. Determinations on products from the radiolysis of terphenyls, biphenyl, and mixtures of these with benzene indicate that free radicals may be the main reactive species generated but that others are present. Comparison of the data with reactions of chemically or photochemically generated free radicals shows that the radiolysis is not random, especially at 300 deg C, but that meta radicals are more frequently formed. Attack by the active species on another molecule is favored in the para position and repressed at the ortho position compared to the meta. The distribution of isomers found indicates that H/sub 2/ abstraction by the free radicals and isomerization reactions do not occur to an appreciable extent. New analytical methods were developed. Chromatography on a solid salt column using LiCl proved to be a very satisfactory method for quaterphenyls and most hexaphenyls. …

None

None

From Abstract: "This treatise is a source document containing information on helium resources, production, conservation, thermodynamic properties, liquefaction and refrigeration techniques, transportation and storage of liquid and safety requirements. It also contains a discussion of uses for liquid and cold gas in cryoelectronics, superconductivity, bubble chambers, cryopumping and missile and space systems."

Abstracts were prepared on 26 of 28 papers presented at the Conference on the Physics of Breeding held at Argonne National Laboratory on October 19 to 21, 1959. (C.J.G.)

None

None

None

None

None

None

None

None

None

None

Progress is reported in 26 papers on radioactive waste disposal, ecologicah research, radiation physics and dosimetry, internal dosimetry, and health physics technology. Twenty-five separate abstracts were prepared. One paper was previously abstracted for NSA. (M.C.G.)

Thirty-three papers presented at the Thorium Fuel Cycle symposium are given. Topics covered include fuel-cycle technology, raw materials, reactor physics, and reactor concepts. Separate abstracts were prepared for each of the papers. (M.C.G.)