Flame Spectra of Vanadium, Niobium, Rhenium, Titanium and Molybdenum (open access)

Flame Spectra of Vanadium, Niobium, Rhenium, Titanium and Molybdenum

Abstract Line spectra of vanadium, niobium, titanium, molybdenum and rhenium of sufficient intensity to allow detection at the 1–10 p.p.m. level can be excited in fuel-rich, oxy-acetylene flames. For the strongest lines of tungsten, the sensitivity of detection is 90 p.p.m. Weak lines of zirconium, hafnium, osmium, tantalum and uranium are also observed in these flames. Recordings of the spectra are given along with wavelength tables of the strongest lines.
Date: July 23, 1962
Creator: Fassel, Velmer A.; Myers, Robert B. & Kniseley, Richard N.
System: The UNT Digital Library
Phase Diagram and Thermodynamic Properties of the Yttrium-Zinc System (open access)

Phase Diagram and Thermodynamic Properties of the Yttrium-Zinc System

Technical report. From Abstract : "Thermal, metallographic, and vapor pressure data were obtained to establish the phase boundaries and the standard free energy, enthalpy, and entropy of formation for the compounds in the yttrium-zinc system."
Date: July 27, 1962
Creator: Chiotti, P. & Mason, J. T.
System: The UNT Digital Library
Mass Systematics Involving Low-Lying Excited States (open access)

Mass Systematics Involving Low-Lying Excited States

Technical report. From Abstract : "A step phenomenon in the nuclidic mass excess surface associated with magic numbers N, Z = 8 and 20 is shown to exist, whereas only breaks occur at higher magic numbers. Excited states are included which reveals possible smooth trends within Shell-Model subshells."
Date: July 3, 1963
Creator: Everling, F.
System: The UNT Digital Library
Process Simulation on a Digital Computer Using Analog Methods (open access)

Process Simulation on a Digital Computer Using Analog Methods

Technical report. From Abstract : "A system has been developed to program a digital computer in much the same manner as an analog computer is programmed. Properties of a general purpose analog computer and a digital differential analyzer are combined to yield a program which employs, as input, standard data cards prepared from a diagram analogous to an analog computer diagram. The capacity of the system is much greater than that of most analog computers, making it applicable to large simulation problems. No scaling is required. The system is compatible with the Fortran symbolic language and may be used as part of a larger digital computer program. It may be applied to the more general types of boundary value problems arising in process simulation in addition to the initial value problems ordinarily solved on analog computers. It is particularly well adapted to non-linear problems and to control problems involving large transport delays. The program operates in basic machine language and, when used by itself, requires no compilation time."
Date: July 10, 1963
Creator: Farris, George J. & Burkhart, Lawrence E.
System: The UNT Digital Library
Internal Conversion Coefficients of the 2+-0+, E2 Transitions in Even-Even Sm152[over]90 and Gd152[over]88 (open access)

Internal Conversion Coefficients of the 2+-0+, E2 Transitions in Even-Even Sm152[over]90 and Gd152[over]88

From abstract: "To investigate the deviation of the internal conversion coefficients of E2 transitions from theoretical computations and their dependence on nuclear deformation, the total internal conversion coefficient of the 121.8-kev 2+-0+ transition in ellipsoidal Sm152[over]90 was measured to be 1.135 ± 0.010 with a high accuracy coincidence-sum method. The K-shell to total internal conversion ratio was determined to be 0.588 ± 0.003 with a [beta] spectrometer...The experiment revealed no deviation from theory nor indications of strong dependence on nuclear deformation; it therefore did not confirm recent beliefs in this regard. The details of the coincidence-sum method were described. The K electron to total electron capture ratio, from Eu152 to the 1.53 Mev state in Sm152 was also measured to be 0.79±0.02."
Date: July 17, 1961
Creator: Lu, D. C. & Schupp, G.
System: The UNT Digital Library
Relationships Between States of Nuclei With Constant Neutron Excess (open access)

Relationships Between States of Nuclei With Constant Neutron Excess

From introduction: "In order to locate systematic trends of states with a certain angular momentum and parity Jπ in nuclei having constant neutron excess, both the ground state and the level energies will be considered simultaneously: we plot the total nuclear binding energy or nuclidic mass excess of excited states, whereby the ground states appear as a special case. Such a natural correlation of level schemes has been employed before Inglis already in 1953."
Date: July 11, 1962
Creator: Everling, F.
System: The UNT Digital Library
The Hydrolysis of the Rare-Earth Carbides (open access)

The Hydrolysis of the Rare-Earth Carbides

From introductory paragraph: "This report concerns the hydrolysis of rare-earth dicarbides, sesquicarbides, solid solutions of carbon in rare-earth metals as well as rare-earth carbon alloys of varying compositions. Many of the carbide samples used in this study were those which had been studied by Gschneider (9)(7) and had been preserved in evacuated, sealed tubes. Some additional preparations of the sesquicarbides were made especially for these studies. The hydrolytic reactions were carried out in water and hydrochloric acid solutions of varying concentrations. Assay of the gaseous products was by mass spectrometry and gas chromatography. Both instruments were carefully calibrated with pure hydrocarbons and hydrogen and mixture thereof."
Date: July 2, 1962
Creator: Svec, Harry J. (Harry John), 1918-; Capellen, Jennings & Saalfeld, Fred E.
System: The UNT Digital Library
Magnetically Dilute Alloys, Rare-Earth Metals, and Superconductivity (open access)

Magnetically Dilute Alloys, Rare-Earth Metals, and Superconductivity

From introduction: "The basic interactions which give rise to the interesting magnetic properties of dilute alloys, such as cobalt in palladium, have received a great deal of attention both theoretically and experimentally. This problem has many facets which are peculiarly interrelated. For example, there is the problem of Curie points of the order of magnitude of 10°K for concentrations of 'magnetic' ions of 0.1%. It has been proposed that this problem involves virtual d-states (Friedel) which permit one to understand much of what is observed."
Date: July 16, 1962
Creator: Legvold, Sam
System: The UNT Digital Library
The Preparation and Properties of Distilled Yttrium (open access)

The Preparation and Properties of Distilled Yttrium

From abstract: "Distillation procedures used for purifying yttrium metal, producing metal containing less than 150 ppm oxygen and lower concentrations of most of the other common impurities, are discussed. Some of the physical and mechanical properties of the distilled yttrium indicate: (1) a melting point of 1510°C, (2) a solid state transformation at 1459°C obtained from high temperature resistivity data, (3) a Rockwell H hardness of 60 and (4) improved rolling and swagging characteristics."
Date: July 27, 1962
Creator: Habermann, C. E. & Daane, A. H. (Adrian Hill), 1919-
System: The UNT Digital Library