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A removable ferromagnetic core is used to increase the trapped flux in a multiply‐connected superconductor. This original trapped flux is then compressed by a superconducting piston so as to produce an intense magnetic field within a relatively large volume. Additional experiments are described...
When a single crystal is used in an x‐ray spectrometer to display the continuous spectrum of an x‐ray tube by Bragg diffraction, absorption edges characteristic of the atomic species in the crystal may be observed. The change in diffracted power across an edge is fundamentally due to a change...
Measurements are made of the wavelengths, linewidths, and fluorescent efficiencies of the fluorescent R 1 and R 2 lines in ruby, in the temperature range 300° to 500°K. The results are used to explain the degradation of ruby optical maser performance at elevated temperatures.
The five independent elastic constants of hexagonal CaMg 2 have been determined by the ultrasonic pulse‐echo technique over the temperature range, 100–300°K. In keeping with normal metallic behavior, the measured elastic constants do not fit the Cauchy relations. The degree of elastic...
The phase diagram for the Bi 2 Te 3 ☒Sb 2 Te 3 pseudo‐binary system is of the solid‐solution type, where the distribution coefficient k is equal to unity at 33.3 and 66.7 mole % Sb 2 Te 3 . The c lat tice parameter remains essentially constant across the diagram at 30.49 Å for both slowly...
So‐called front‐wall cells have been produced from CdS by inwards diffusion and subsequent selective etching away of the metal (Cu, Ag, Ni) producing the barrier layer. In particular, measurements were carried out of the dark current as a function of the voltage applied at different...
The classical scattering for repulsive potentials is treated approximately by a matching method. The matching potential is a cut‐off potential which matches the value and the slope of the actual potential at the distance of closest approach. The method is thought to be successfully applicable...
Fine rod and whisker‐type crystals of undoped CdS whose dark conductivity was of the order of 10 −10 (Ω‐cm) −1 were bombarded with 100‐keV electrons. Following bombardment dark conductivity of the order of 10 −3 (Ω‐cm) −1 was observed. Heat treatment to about 200°C reduced the...
The transient response of a three‐level optical maser is calculated for a density of homogeneously broadened atoms coupled to one homogeneously broadened cavity mode. The atoms are treated in terms of the density matrix and the cavity mode is treated classically. Solutions are found...
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