Now showing items 11-20 of 69
The Depth Dependence of Earth Conductivity Upon Surface Potential Data
(The American Institute of Physics, 1942-03)
The problem of determining electrical earth conductivity from the surface, in the case where it is a function of the depth only, is solved by a perturbation method, which formally at least, allows the unperturbed functions ...
The Infra‐Red Absorption Spectra of Ethylene and Tetra‐Deutero‐Ethylene under High Resolution
(The American Institute of Physics, 1942-02)
The fine structure of several infra‐red absorption bands of C2H4 and C2D4 have been resolved. From the rotational constants so found, the C☒C and C☒H distances in this molecule were calculated to be 1.353 and 1.071A, and ...
Electronic Structure and Stability of Hydrogen Halides and of Complex Ions XO4
(The American Institute of Physics, 1942-07)
(1) It is shown that in the hydrogen halide molecules (internuclear distance r0) the proton penetrates the electronic shell of the anion to a depth which for the simplified case of spherical symmetry can be characterized ...
Thermodynamic Properties of the Internal Rotator. Double Minimum with Repulsive Forces
(The American Institute of Physics, 1948-04)
The basis for calculating the thermodynamic properties of the unsymmetrical internal rotator from energy levels derived from the old quantum theory is described, and a method is outlined for calculations with a potential ...
The Analysis of Multicomponent Mixtures of Hydrocarbons in the Liquid Phase by Means of Infra‐Red Absorption Spectroscopy
(The American Institute of Physics, 1946-03)
This is a general method of applying infra‐red absorption spectroscopy to the analysis of multicomponent hydrocarbon mixtures in the liquid phase. The procedure is calibrated by measuring optical densities of synthetic ...
The Calculation of the Contribution of Freely Rotating Groups to Electron Scattering by Gases
(The American Institute of Physics, 1945-04)
The contribution from freely rotating atoms to the intensity of electron scattering by gaseous molecules is obtained by means of an asymptotic evaluation of an integral, using the saddle point method. It is possible now ...
The Infra‐Red Absorption Spectrum of Mono‐Deutero‐Ethane under High Resolution
(The American Institute of Physics, 1949-02)
The infra‐red spectrum of C2H5D has been investigated under high resolution. As expected, the bands corresponding to degenerate vibrations of C2H6 are split into two components with oscillations in the symmetry plane and ...
The Infra‐Red Absorption Spectrum of Methyl Amine
(The American Institute of Physics, 1940-03)
The parallel type methyl amine band at 10μ has been resolved. Its center is at 1045.27 cm—1, and the very regular structure of its P and R branches indicates a close approximation to axial symmetry. The mean of the two ...
Force Constant of the Association Bond in the Formic and Acetic Acid Dimers
(The American Institute of Physics, 1946-06)
The entropies of the formic and acetic acid dimers are used to find a minimum value for the force constant of the association bond. With the aid of a normal coordinate treatment the probable value is found to be 4×104 ...
Restricted Rotator Thermodynamic Properties from the Old Quantum Theory
(The American Institute of Physics, 1947-09)
Accurate partition functions and free energies are calculated for the hindered internal rotator from the old quantum theory based upon the quantization rule of Wilson and Sommerfeld. The description of the system is ...