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The spectra of four new ions have been added to the sequence of spectra isoelectronic with Ca I. A vacuum spark produced the radiation, which was analyzed in a vacuum spectrograph with a concave grating set for grazing incidence. The transitions observed were those between the ground...
The phase angle of pure dry rocksalt, measured through the range of 1 to 1000 kilocycles, is found to be less than 0.0001. Moisture increases the power factor greatly, especially at the lower frequencies. Traces of surface contamination with certain organic substances may cause rocksalt to have...
In the study of complex atomic spectra by the methods of Slater and Condon, it is desirable that one have a complete set of orthogonal wave functions more nearly correct than the hydrogenic ones. A set of variable-scale wave functions is described in this paper and applied to some simple cases....
For systems containing polar molecules it has been found that there is a wave-length region in which the dielectric constant decreases with increasing frequency. This wave-length region, dependent upon the size of the orienting molecule and the viscosity of the medium, determines a time of...
The range of the α -particles from thorium has been measured by the methods used by one of the authors previously. At 0°C and 760 mm the extrapolated numberdistance range is 2.72±0.03 cm. This range is derived from 300 tracks. It is pointed out that the great deviation of this range from that...
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