Bismuth (open access)

Bismuth

This report provides a broad and in depth discussion of bismuth, discussing the properties of bismuth--including physical, electrochemical, and chemical properties. It then discusses the processes by which bismuth is detected and how bismuth can be separated and isolated, with discussions of dissolution, precipitation, and extraction.
Date: 1960
Creator: Fritz, James S.
System: The UNT Digital Library
The Crystal Structure of LiCuCl3-2H2O* (open access)

The Crystal Structure of LiCuCl3-2H2O*

This report undertakes research to study LiCuCl3-2H2O is from a structural standpoint, revealing the oxygen positions. The study uses the Levy-Bussing anisotropic temperature factor treatment and least squares program to determine a discrepancy factor for the visually determined intensities. The structure of the molecule is also found to have interesting magnetic properties which has inspired a new study at Brookhaven.
Date: 1960
Creator: Vossos, Peter H.; Fitzwater, D. R. & Rundle, R. E.
System: The UNT Digital Library
An Electrical Pass-Through for Clean, High Vacuum Use (open access)

An Electrical Pass-Through for Clean, High Vacuum Use

This report describes the method and research that led to the development of a "new type of mechanical seal for a high-voltage, vacuum pass-through...for use in a general utility 60º sector mass spectrometer." (From introductory paragraph)
Date: 1960
Creator: Jackson, Don M.; Wells, Garry & Soseman, Donald
System: The UNT Digital Library
Mass Transfer Coefficients and Interfacial Area in a One Stage Pulse Column (open access)

Mass Transfer Coefficients and Interfacial Area in a One Stage Pulse Column

From abstract: "Over-all mass transfer coefficients were determined by considering the operation of the pulse column to be a stage-wise process. The area for mass transfer was obtained by direct photographic measurements...The mass transfer coefficient was found to increase when the interfacial tension was reduced..."
Date: November 1960
Creator: Konopik, Alvin Eugene & Burkhart, Lawrence
System: The UNT Digital Library
Microwave Measurements of Hall Mobilities in Semiconductors (open access)

Microwave Measurements of Hall Mobilities in Semiconductors

From abstract: "The Hall mobilities of germanium single crystals were measured with a microwave frequence of 9000 Mc/sec over the temperature range 30°K to 300°K. A rectangular sample occupied the central part of the wall of a rectangular cavity, which was doubly generate in the TE101 mode and in the TE011 mode at a single resonance microwave frequency. The external magnetic field and microwave field associated with one of the two modes gave rise to the other mode of oscillation, owing to excitation by the microwave Hall field. The theoretical analysis was verified by measurements on an n-type sample having a room temperature resistivity of 0.40 ohm cm. The measured Hall mobility at microwave frequencies (with a size correction) was compared with the D.C. Hall mobility between 30°K to 300°K. The maximum discrepancy was 15%. The estimated experimental error in the microwave measurement was 16%. The magnetic field dependence of the microwave Hall mobility in a p-type sample, having a room temperature resistivity of a 0.77 ohm cm, was in qualitative agreement with the D.C. results obtained by Willardson et al."
Date: November 1960
Creator: Nishina, Yuichiro & Danielson, G. C.
System: The UNT Digital Library
Photoproduction of Beryllium-7 (open access)

Photoproduction of Beryllium-7

From abstract: "The nuclide Be7 has been produced by photoactivation of Be9, B and C12 using the bremsstrahlung beam of an electron synchrotron operated at 45 Mev. Integrated cross sections for the formation of Be7 have been estimated by comparison with the Ta181([gamma],n)Ta180m reaction. The reaction C12([gamma],2p3n)Be7 has also been observed in irradiations at 30, 35 and 40 Mev maximum energy. Its yield has been compared with that of the C12([gamma],n) reaction at 45 Mev. The reaction A127([gamma],2p3n)Na22 was observed at 45 Mev."
Date: 1960
Creator: Foster, M. S. & Voigt, A. F.
System: The UNT Digital Library
Seebeck Effect in Magnesium Silicide (open access)

Seebeck Effect in Magnesium Silicide

From abstract: "The Seebeck coefficient (thermoelectric power) has been measured from 7°K to 1000°K for both n-type and p-type single crystals of Mg2Si...The phonon contribution, Sp, was obtained from the measured Seebeck coefficient by subtracting off the electron diffusion term, Se, which was calculated with the aid of the measured Hall coefficient. The magnitude of Sp was observed to be proportional to T-3 and to show the dependence on sample size and on carrier concentration predicted by the theory of C. Herring..."
Date: November 1960
Creator: Heller, Marvin William & Danielson, G. C.
System: The UNT Digital Library