RESEARCH ON SOLID STATE RADIATION-INDUCED PHENOMENA
Abstract
Self-activated semiconductivity in CdS single crystals: The semiconductivty produced by selfactivation in cadmium sulfide zinc crystals is investigated. It can be ascribed to the formation of Frenkel and Schottky defects. Nonelectrical method for keeping the level of liquid nitrogen in a dewar vessel constant: A cooling technique is described which provides for keeping the temperature of a cooled sample constant within 1/10 degree. The sample is dipped into a dewar vessel which has a pipe coming out at the level where the liquid nitrogen should be maintained. Closing the dewar top provides automatic self-control of the liquid level when liquid nitrogen is pumped into the vessel via a syphon pipe. Simultaneous conductivity and luminescence measurements on ZnS (Cu) powder: A.C. Impedance measurements were used to determine the photoconductivity of a ZnS:Cu phosphor. To obtain homogeneous excitation, long wavelength irradiation (blue and green light) was used. Even with this type of excitation (activator absorption only) some inhomogeneity exists. Temperature effects: The gamma-ray induced fluorescence of a series of deoxygenated solution of p-terphenyl in o-xylene is measured as a function of increasing temperature. Quenching is greatest in the absence of solute. Dilution of the solvent by a non-transferring liquid does not affect the degree of quenching.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1962
- Accession Number
- AD0277734
Entities
People
- Hartmut Kallmann