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The Nuclear Spins and Magnetic Moments of Certain Gold and Silver Isotopes

Description: An atomic-beam magnetic-resonance apparatus operating on the flop-in principle was used to measure the nuclear spins and hyperfine-structure separations of the /sup 2/S/sub 1/2, electronic ground state for several radioactive isotopes of silver and gold. The results of these experiments, together with calculated values of the nuclear magnetic-dipole moments, are given (auth)
Date: June 1, 1959
Creator: Ewbank, W. B.
Partner: UNT Libraries Government Documents Department
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Manipulator Cable With Constant Stress

Description: A manipulator or mechanical arm involves an upper and a lower arm, with a variable angle between them. Cables used to transmit motion and force from the upper to the lower arms pass over a pulley at the joint or elbow. A pulley, axiaily fixed with respect to the joint, imposes a change in length of the cable as the angle between the arms varies. Manipulation design requires a cable of constant length during this variation; this constant length may be achieved by guiding the center of the pulley… more
Date: November 1, 1959
Creator: Grimson, J. H.
Partner: UNT Libraries Government Documents Department
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Some Nuclear Properties of Bi206, Tl200, Tl201, Tl202, In109, In110m, and In111 : the Nuclear Spins of Bi206, Tl200, Tl201, and Tl202 ; the Nuclear Spins, Magnetic Dipole, and Electric Quadrapole Interaction Constants of In209, In110m, and In111

Description: The atomic-beam magnetic-resonance flop-in technique using radioactive detection was employed to measure the nuclear spins doff B/sup 206/ , Ti/sup 200/ , Tl/sup 201/ Tl/sup 202, In/sup 09. ln/sup 110m/ and In/sup 111/. In addition the magnetic-dipole and constatns of In/sup 109/, In/sup 110m/, ined. the signs of the In/sup 110m/ con-, stants were not determined. Results, theory, procedure, and data reduction are given. (auth)
Date: April 1, 1959
Creator: Marino, L. L.
Partner: UNT Libraries Government Documents Department
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A Proposal for Determining the Electro-Magnetic Form Factor of the Pion

Description: The possibility of measuring the electromagnetic form factor of the pion by extrapolation of the cross section for e/sup -/ + p 1100 deg C are n + The effects of /sup +/ + e/sup -/ was investigated. The method is based on the existence of a pole in the electropionproduction scattering amplitude as a function of the invariant momentum-transfer of the nucleon. The residue of this pole is the pion form factor multiplied by a known coefficient. Since the pole lies slightly outside the physical regi… more
Date: February 1, 1959
Creator: Frazer, William Robert
Partner: UNT Libraries Government Documents Department
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Independent Yields of Isomeric Pairs in Nuclear Reactions

Description: The Cd/sup 115m/ and Cd/sup 115/ isomers produced in 12- to 340Mev proton bombardments of U/sup 238/ were isolated by radiochemical methods. The cumulative yield ratios of Cd/sup 115/Cd/sup 115m/Cd/ were determined. In the 45- Mev heliumion flssion of uranium, an estimation of the independentyield ratio of Pm/sup 148/ (5.3-day) to Pm/sup 148/ (43-day) was made. In the deuteron fission of uranium at about 20 Mevs an estimate of the independent-yield ratio of Nb/sup 95m/ to the total niobium of m… more
Date: April 1, 1959
Creator: Bailey, S. M.
Partner: UNT Libraries Government Documents Department
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Charged-Particle-Induced Fission: A Mass Spectrometric Yield Study

Description: The products from the flssion of U induced by charged particles were studied in a mass spectrometer. Both U/sup 238/ and U/sup 235/ were bombarded with 45.7- and 24-Mev helium ions, and U/sup 238/ was also bombarded with 730-Mev protons and 100-Mev carbon ions. Tbe total chain-yields in the region of the rare-earth elemerts (mass 140 to mass 155) for most of the above bombardments and a thermal-neutron bombardment of U/sup 235/ were studied by using the isotopicdilution technique. Independent y… more
Date: November 1, 1959
Creator: Chu, Y. Y.
Partner: UNT Libraries Government Documents Department
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Control Aspects of Very High Flux Research Reactors

Description: Submitted to Rensselaer Polytechnic Inst. The computation of reactor characteristics over a fuel cycle in a way suitable to the investigation of the control aspects of the reactor problem is considered. The dynamic problem including as independent variables the neutron energy, the spaces and time was studied. An additional condttion of versatility in the method used to obtain the solutions is necessary to explore the control aspects of the problem. The normal possibilities of the analog compute… more
Date: May 1, 1959
Creator: Vianna, Antonio C. Didier B.
Partner: UNT Libraries Government Documents Department
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Complete Determination of Polarization for a High-Energy Deuteron Beam

Description: please delete the no. 17076<><DSN>13:017077<ABS>The P/sub 1/ multigroup code was written for the IBM-704 in order to determine the accuracy of the few- group diffusion scheme with various imposed conditions and also to provide an alternate computational method when this scheme fails to be sufficiently accurate. The code solves for the spatially dependent multigroup flux, taking into account such nuclear phenomena is slowing down of neutrons resulting from elastic and inelastic scattering, the r… more
Date: May 1, 1959
Creator: Button, J.
Partner: UNT Libraries Government Documents Department
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Research in Photosynthesis

Description: The determination of the specific radioactivities of the chlorophylls and carotenoids of algae after photosynthesis with C/sup 14/O/sub 2/ is a formidable task, due to the extreme lability of these compounds. The whole success of the method depends on adequate chromatographic separations of the pigments from the colorless contaminants which are closely associated with them, and yet the time involved for such separations is sufficient for marked decomposition of the pigments to occur. It is sugg… more
Date: September 1, 1959
Creator: Anderson, Joan Mary
Partner: UNT Libraries Government Documents Department
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The Kinetics and Stability of Fast Reactors With Special Considerations of Nonlinearities

Description: The dynamic behavior of a fast reactor, when the neutron flux is considered as a function of time, is considered. The kinetics of a fast reactor can be grouped into three distinct areas of interest; the first being the normal operating conditions where all the changes are brought about in a slow manner. and the resulting flux changes being small in comparison with the steady stuff flux. Since the available reactivity and the power density of most large thermal reactors is so small, and the heat… more
Date: June 1, 1959
Creator: Sandmeier, H. A.
Partner: UNT Libraries Government Documents Department
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Thermodynamic Properties of Dilute Aqueous Hydrochloric Acid Solutions at Elevated Temperatures From Electromotive Force Measurements

Description: BS>Results of a study of thermodynamic properties of aqueous hydrochloric acid solutions are presented. A hydrogen electrode was used against a silver-silver chloride electrode at 25 to 275 deg C using hydrogen pressure of about 1 atm. and hydrochloric acid concentrations of 0.005 to 1.0 M. Electromotive measurement techniques are described and resulting data are tabulated. (J.R.D.)
Date: May 1, 1959
Creator: Greeley, R. S.
Partner: UNT Libraries Government Documents Department
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Hydrodynamic Aspects of Boiling Heat Transfer

Description: A study concerned with the determination of the limiting hydrodynamic conditions which characterize nucleate and transitional boiling was conducted. The critical heat flux and the minimum heat flux are derived from these hydrodynamic limits. Results of investigations of nucleate boilin g are discussed and the theory of bubble growth is extended to include the effect of non-uniform temperature fields. An equation is derived for the product bubble diameter times frequency of bubble emission, and … more
Date: June 1, 1959
Creator: Zuber, N.
Partner: UNT Libraries Government Documents Department
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Nuclear Spin and Hyperfine-Structure Measurements on the Radioactive-Iodine and Astatine Isotopes

Description: Atomic-beam magnetic resonance techniques were used to measure the nuclear spins of I/sup 123/, I/sup 124/, I/sup 126/, I/sup 130/, I/sup 132/, I/ sup 133/, I/sup 135/, and At/sup 211/. Also, measurements of the magnetic-dipole interaction constant, and the electroquadrupole interaction constant, and the electroquadrupole interaction constant for I/sup 131/ and I/sup 132/ are reported. The design of the atomic-beam apparatus is described. Experimental methods and sample preparation are discusse… more
Date: August 1, 1959
Creator: Garvin, H. L.
Partner: UNT Libraries Government Documents Department
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Range and Range Straggling of Heavy Recoil Atoms

Description: The range and range straggling of 96.8-kev Ra/sup 224/ recoil atoms produced by alpha decay of Th/sup 228/ have been measured in H/sub 2/, D/sub 2/, He, N/sub 2/, Ne, and Ar by a charged, parallelplate, collection technique. The range and range straggling of 725-kev Th/sup 226/ recoii atoms produced by bombardments of Ra/sup 226/ with 41.6-Mev helium ions have been measured in D/sub 2/, He, N/sub 2/, and Ar by this same technique. Experimental results seem to indicate that the range-energy rela… more
Date: November 1, 1959
Creator: Valyocsik, E. W.
Partner: UNT Libraries Government Documents Department
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