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A term analysis of the solid‐state spectra of trivalent neodymium and erbium has been made and this has allowed terms to be assigned to most of the observed levels of these ions. The complete spin‐orbit matrices, with the addition of the electrostatic interaction energies, corresponding to...
The refractive index of pure liquid benzene has been measured in the 2‐to 21‐μ region to an accuracy of about ±0.003 using an interferometric technique developed by Kagarise and Mayfield. A general relation is derived between the refractive index and integrated absorption coefficients of a...
By using purely classical mechanics, the amount of energy Δ E vib transferred to an harmonic oscillator molecule in a head‐on molecular collision of velocity v 0 is calculated. In the classical limit for small transition probabilities, the quantum‐mechanical probability per collision of...
A method is described for the measurement of microwave line widths and integrated intensities with Stark‐modulation spectrometers. The method makes use of a property that the peak intensity α max,meas , measured at a given Stark field E, depends, under certain conditions, only on the...
A solid state electrochemical technique has been used to obtain thermodynamic information on uraniathoria solid solutions of compositions U y Th 1− y O 2+ x U y Th 1 − y O 2 + x with values of y of 0.9 to 0.3 and values of x of 0.02 to 0.16. The electrochemical cells were of the type...
In the present investigation the authors have determined the electric dipole values for twenty‐three organic solutes according to Higasi's method. Except for two substances, viz., iodoform and ethylene dibromide, the dipole values so obtained agree fairly well with those obtained by usual...
Ion‐molecule reactions of low energy (0–0.15 ev) CHN + and CH 3 N + are shown conclusively to follow a hydrogen atom abstraction mechanism of the type, XH + +YH→XH 2 + +Y. These reactions are presumably bimolecular being first order with respect to each reactant over the pressure range 10...
A method is given for constructing the best hybrid orbitals for a molecule M—(X 1 ⋅⋅⋅X k ) from a set of n atomic orbitals of M, based on the principle of maximum overlap. To illustrate the theory, hybrid orbitals for ClF 3 are constructed from the chlorine 3 s, 3 p, and 3 d atomic orbitals.
The molecular structure of gaseous isobutylene has been investigated by the sector‐microphotometer method of electron diffraction. The major internuclear distances found, in terms of center of gravity parameters, r g , were C☒H (methyl)=1.113±0.003 A (assumes ethylenic hydrogens have...
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