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The mean free paths and effective collision cross sections of neutral atoms of Li, Na, K, Rb and Cs were measured in H 2 , D 2 , He, Ne and A by the method of molecular beams. The beams were sufficiently narrow and the scattering gas was confined to a region sufficiently small that a resolution...
A band system has been observed when light is absorbed by lead vapor heated to about 1400°C. The same band system has also been found in emission. Some ninety band heads have been located between the wavelengths of 4600 and 5200A. The bands are degraded toward the red. The vibrational analysis...
The infrared absorption spectrum of solid hydrogen chloride has been studied in the region of 3.7 μ with the aid of an echellette grating. The band is composed of a series of fairly broad lines, and if the center is taken to be the line at 2669 cm - 1 the remaining lines taken in pairs can be...
The theory of two-electron systems involves both the electrostatic interaction between the electrons and the magnetic interaction between the spin and orbital moments of each electron. The inclusion of this latter effect requires the knowledge of the matrix of a 1 l 1 · s 1 + a 2 l 2 · s 2 ....
Since the 1934 report, asymmetries have been studied by the coincidence counter method at several stations in Mexico and in Colorado so that the completed survey now includes data at high (4300 m), low (sea level) and intermediate elevations at the geomagnetic equator, in the intermediate...
The spark spectrum of silver has been photographed and measured in the region from 500 to 3000A. To assist in the identification of Ag III lines, the spectrum of silver from the hollow cathode discharge in an atmosphere of helium was photographed from 500 to 2600A. A spark gap placed in series...
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