Independent Yields of Isomeric Pairs in Nuclear Reactions (open access)

Independent Yields of Isomeric Pairs in Nuclear Reactions

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 mass 95 was made. A literature survey on experimental isomer ratios from fission was made. The yield ratio of Sc/sup 44// Sc/sup 44/ was measured in Sc/sup 45/ ( alpha , alpha n)Sc/sup 44/ reactions with helium ions of energies between 20 and 43 Mev and at 320 Mev. The Sc/sup 44m/Sc/ sup 44/ ratio was measured in K/sup 41/( alpha ,n)Sc/sup 44/ reactions at 10 and 43 Mev. The compound-nucleus model was used to calcalate the Sc/sup 44m/Sc/sup 44/ ratios produced by the reactions /sup n44/ and Sc/sup 45/(p,pn)Sc/sup 44/ at energies 0.4 Mev above threshold. Agreement between the experimental and calculated Sc/sup 44m/Sc/sup 44/ ratio was obtained for the K/sup 41/(l0-Mev alpha ,n)Sc/sup 44/ reaction. A classical knock-on …
Date: April 1, 1959
Creator: Bailey, S. M.
System: The UNT Digital Library
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 (open access)

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

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.
System: The UNT Digital Library
Thermal Conductivity and Viscosity of Gas Mixtures (open access)

Thermal Conductivity and Viscosity of Gas Mixtures

Correlations based upon empirical modified equations derived from kinetic theory were developed for the thermal conductivity and viscosity of gas mixtures. The conductivity equation was compared to 226 binary mixture conductivities in temperatures from 0 to 774 deg C from the literature and this work. The average deviation is 2.1%. In correlating conductivity data of mixtures of polyatomic molecules, the energy transport is considered in two parts, i.e., one protion transferred by collision and the other by diffusion. The proposed viscosity equation reproduces 103 binary data points with an average deviation of 1.3%. These equations are more consistent with experiment than existing correlations in the literature. the relation of the conductivity or viscosity to composition and temperature are discussed in the light of the proposed equations. It has been demonstrated that, at a given composition, the ratio of the measured conductivity to that calculated on the molar average basis for mixtures of most simple molecules and the ratio of the measured viscosity to that calculated on the molar average basis for mixtures of most gases should be nearly constant over a temperature range of 200 to 300 deg C. The thermal conductivity of ten gases and selected binary and ternary …
Date: April 1, 1958
Creator: Cheung, H.
System: The UNT Digital Library
Coincidence Nuclear Spectrometry With Applications to Europium-154 and Europium-155 (open access)

Coincidence Nuclear Spectrometry With Applications to Europium-154 and Europium-155

None
Date: April 1, 1957
Creator: Juliano, J. O.
System: The UNT Digital Library
Vacuum Flow of Gases Through Channels With Circular, Annular, and Rectangular Cross Sections (open access)

Vacuum Flow of Gases Through Channels With Circular, Annular, and Rectangular Cross Sections

None
Date: April 1, 1956
Creator: Dong, W.
System: The UNT Digital Library
Preparation of Metallic Titanium by Film Boiling (open access)

Preparation of Metallic Titanium by Film Boiling

None
Date: April 1, 1954
Creator: Petersen, A.W.
System: The UNT Digital Library