179 Matching Results

Search Results

Results: 1 - 24 next
open access

Bimetallic Casting

Description: "Uranium and zirconium were bonded by melting the two metals in contact with one another in a bimetallic casting process. Tensile tests of specimens containing the original zone of interface between the two metals showed that all failures were at locations other than the interface. The coefficients obtained for diffusion between molten uranium and molten zirconium varied from 2.13 cm squared per day at 3,380 degrees F. to 9.17 cm squared per day at 3,510 degrees F. the activation energy for th… more
Date: September 1, 1962
Creator: Poole, Thomas & Krashes, David
Partner: UNT Libraries Government Documents Department
open access

Bimetallic Casting

Description: "The purposes of the program being conducted under the present contract are: 1) To determine the feasibility of cladding zirconium on uranium by a direct casting process. 2) To investigate the diffusion of liquid metals in the fusion zone."
Date: March 29, 1961
Creator: Krashes, David
Partner: UNT Libraries Government Documents Department
open access

A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "The degree of equilibrium swelling of low density polyethylene by various di- and tri-functional monomers has been experimentally determined. Non-extractable portions of irradiated monomer-polymer and monomer-free-polymer samples have been determined by refluxing in a Soxhlet extractor. Irradiated, monomer-free polyethylene samples that give a non-extractable portion after Soxhlet, refluxing dissolve by direct immersion in the same hot solvent.
Date: 1961
Creator: Radiation Applications Incorporated
Partner: UNT Libraries Government Documents Department
open access

A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "Additional mixtures of polymers and multi-unsaturated monomers have been prepared, irradiated and the gel content determined. The gel content determination of crosslinked polyolefins has been investigated in detail. The multi-unsaturated monomers used and radiation conditions applied up to this time have not given significant gel contents for polypropylene. the polypropylene resin used has been characterized by differential extraction."
Date: November 22, 1960
Partner: UNT Libraries Government Documents Department
open access

A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "Polyvinyl chloride degrades quite badly under irradiation due to the ease of splitting out HC1. The incorporation of polyfunctional monomers, however, has been found to lower the radiation doses required for gelation below those which result in degradation. Thus, gelation of polyfunctional monomer-polyvinyl chloride mixtures has been achieved quite readily."
Date: 1961
Creator: Radiation Applications Incorporated
Partner: UNT Libraries Government Documents Department
open access

Computer description APPR-1 simulator

Description: The APPR-1 is a pressurized water reactor having a low specific heat fuel and a water primary coolant. The primary coolant loop delivers heat from the reactor to the steam generator. The secondary water in the steam generator is converted to steam and then taken to the turbine to drive an electrical generator. The simulation of this system is broken down into three primary areas: the neutron kinetics in the reactor which are necessary to generate the primary power function, the heat transfer… more
Date: December 15, 1958
Creator: RCA Service Company
Partner: UNT Libraries Government Documents Department
open access

Inelastic Proton-Proton Scattering At 1.3 Bev

Description: "The understanding of interactions between the elementary particles, which no number thirty, and range from the massless neutrino to the Е with a mass of approximately 1320 Mev, in a prerequisite to the knowledge of the structure of matter. Although the complex aggregate of elementary particles which constitute matter displays properties different from those of the basic building blocks, nevertheless it is impossible to gain a firm knowledge of the behavior of matter without first ascertaining… more
Date: May 1961
Creator: Hien, Nguyen Chi
Partner: UNT Libraries Government Documents Department
open access

Final Contract Report for September 1, 1959 to August 31, 1960 .

Description: "As presented in the original proposal the project consisted essentially of three parts: Phase I, Development and refinement of a radiochemical flow counting technique for the study of kinetics of reactions in solution ; Phase II, The application of this technique to the detailed study of the mechanism of solvolysis of sulfonium salts in mixed solvents ; Phase II, The further application of this kinetic technique, as a longer term aim, to other reacting systems of biochemical or other interest.… more
Date: October 31, 1961
Creator: Hyne, James B.; Abrell, J. W.; Gurst, J. E. & Jacobson, Ada L.
Partner: UNT Libraries Government Documents Department
open access

Atom Arrangements in Some Iron-Aluminum Solutions, Report No. 1

Description: "Short-range order coefficients were measured at 300 and 400°C for iron-aluminum alloys containing 14.8, 18.2, and 20.0 atomic per cent aluminum. These alloys exhibited a strong preference for unlike near neighbors. The short-range order was greater at the lower temperature and increased as the Fe 3Al composition was approached."
Date: July 12, 1962
Creator: Houska, C. R. & Averbach, B. L.
Partner: UNT Libraries Government Documents Department
open access

Fluoroscopic Crystal Investigation

Description: "An investigation was carried out on the possibility of increasing the light output of single crystals by applying an electric field throughout the crystal lattice. Pulses of frequency 2.5 x 10/sup 5/ cps were used with a voltage gradient of 10/sup 4/ volts/cm, and gamma radiation from Cs/sup 1//sup 3// sup 7/ and Co/sup 6//sup 0/ was used to excite the crystals. Tests were run on many types of scintillators. The visible light output was found to be increased by electric pulses for many of the … more
Date: 1961
Creator: Franklin, William A.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Vacuum Techniques

Description: "Activities in an investigation of basic phenomena associated with particle interactions at surfaces are reported. Development of components, which may be of interest to others working in ultrahigh vacuum research, for use in the research program is described. Work in development of components and techniques was directed toward investigations of non-refrigerated traps, a cryogenic pump using liquid He, and development of electron sources. Research on interaction of particles at surfaces was dev… more
Date: unknown
Creator: Fox, R. E.; Lange, W. J. & Singleton, J. H.
Partner: UNT Libraries Government Documents Department
open access

Progress Report on Project at (30-1)1018: Polar-Nonpolar or Amphipathic Inorganic Compounds

Description: "Results of molecular studies showed that, depending on the chemical composition, polyphosphates are either linear or branched flexible chain molecules. The branch points were easily destroyed by hydrolysis. Hydrolytic stability studies showed that the rate constants are much smaller for the splitting of internal bonds than for the hydrolysis near the chain ends, where both monomeric and trimeric rings are formed. The kinetic study of the degradation of sodium pentaphosphate was continued. Prel… more
Date: unknown
Creator: Strauss, U. P.
Partner: UNT Libraries Government Documents Department
open access

568 Report

Description: Final report for a grant contract documenting information about the scope of the project and results.
Date: 1960
Creator: Pollard, Ernest C. (Ernest Charles), 1906-1997
Partner: UNT Libraries Government Documents Department
open access

Investigations of Radioactive Fuel-Bearing Glasses

Description: "A series of glass compositions containing uranium oxide was investigated to determine fiberizability and physical properties of resultant fibers. The basic properties to be determined were the maximum U/sub 3/O/sub 8/ content in a fiberizable glass and the maximum service temperature of the fibers. Glasses containing 60 wt% U/sub 3/O/sib 8/ were fiberizable; the fibers had strengths of 100,000 psi at 1600 deg F. Fiber-forming equipment was installed at Moun Laboratory to produce glass fibers c… more
Date: July 31, 1961
Creator: Lockwood, P. A.
Partner: UNT Libraries Government Documents Department
open access

The Relation of Genome Numbers to Radiosensitivity

Description: "This approach to the problem of radiation damage was reported. A comparison of haploid males and diploid females with respect to their radio-sensitivity was made at various stages of embryonic and post-embryonic development. Differences in sensitivity were observed and taken to indicate that genetic damage is involved in the effects of x-rays upon development in Habrobracon juglandis."
Date: 1961
Creator: Clark, Arnold M.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Vacuum Techniques

Description: "Further experiments with the zeolite traps using both nude'' and tubulated ion gages indicates an appreciable amount of untrapped vapors passing through the unrefrigerated zeolite. The exact nature of this vapor was not determined. Investigations of the all stainless steel vacuum system indicate that the large source of desorbed H/sub 2/ is that adsorbed in the walls. Other work is reported on low temperature cathodes and construction of an ionization gage incorporating a SiC emitter and an el… more
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Vacuum Techniques

Description: "Investigations were continued with zeolite traps. Results indicate that certain gases are not trapped by zeolite and must be removed by ion pumping. In experiments to obtain a cold electron source ion gage, output electron currents of several milliamperes were obtained using SiC in conjunction with an electron multiplier. Fundamental surface reaction studies were continued on photodesorption of CO from W, O adsorption on W, H solubility in W, and inelastic collisions of electrons at surfaces."
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Vacuum Techniques

Description: "The use of SiC in conjunction with an electron multiplier was found to offer good possibilities for a cold electron ion gage. A helium cryopump with 50 1/sec pumping speed was developed that is capable of maintaining a static system at pressures below approximates 5 x 10/sup -11/ torr with only about one liter of liquid helium every 8 hr. Additional results are reported in photon desorption experiments from tungsten and glass, hydrogen absorption on tungsten, and oxygen adsorption on tungsten.… more
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Vacuum Techniques

Description: "Mass spectrometer monitoring of peaks upon flashing the target in measurement of CO photodesorption from W indicates bulk heating to be a main contribution to desorption. Study of auger electron ejection from absorption of O on W yields good agreement between calculated and measured values for electron ejection. Values for O adsorption on W are compared with other determinations, and wide variations in sticking probabilities are noted. Measurements of the conversion of O incident on W ribbons … more
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Vacuum Techniques

Description: "The photodesorption of gases from metals by uv photons has been studied with a high sensitivity mass spectrometer. A program to develop low-temperature cathodes is underway to study hydrogen interactions at various surfaces. Preliminary results on the degassing characteristics of an all metal system have been obtained."
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
open access

Ultrahigh Vacuum Techniques

Description: "Investigations were continued on the characteristics of zeolite traps and on a small cryopump. Studies of an all metal vacuum system indicated that this system is superior to glass systems when operated at elevated temperatures. The major contribution to the gas evolution is hydrogen. The characteristics of an electron multiplier operating under ultrahigh vacuum procedures were studied. The desorption of gas by photons is being investigated."
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
open access

Investigations of Radioactive Fuel-Bearing Glasses

Description: "A series of high urania-content glasses were fiberized and examined for high-temperature strength properties. One glass, RX360 containing 60% U/sub 3/O/ sub 8/ by weight, had better high-temperature tensile properties than any glass previously reported. It was observed that many of the glasses studied separated into immiscible phases and that the fiberizable glass phase had lower U/sub 3/O/ sub 8/ content than the base compositions. A physical analysis of crystal structures of the devitrificat… more
Date: June 30, 1962
Creator: Lockwood, P. A.
Partner: UNT Libraries Government Documents Department
open access

The Decontamination and Recovery of Precious Metals

Description: "This report is the third quarterly report under Contract AT(30-1)-2528 for the decontamination and recovery of precious metals from contaminated scrap. The results described in [2nd quarterly report] and expanded in this report confirm the statement that the method achieves not only the desired decontamination but also produces a product of high purity. In addition the relative simplicity of the method makes it particularly adaptable to large scale manipulation."
Date: 1961
Creator: Nuclear Materials and Equipment Corporation
Partner: UNT Libraries Government Documents Department
open access

The Decontamination and Recovery of Precious Metals

Description: "This is the second quarterly report under Contract AT(30-1)-2528 for the decontamination and recovery of precious metals from contaminated scrap. the emphasis on the analytical chemical techniques and methods was continued during this report period."
Date: 1960
Creator: Nuclear Materials and Equipment Corporation
Partner: UNT Libraries Government Documents Department
Back to Top of Screen