Accession Number : ADA118517

Title :   Long Range Materials Research. Supplement 2. Excitonic Emission from CsI(Na),

Corporate Author : STANFORD UNIV CA CENTER FOR MATERIALS RESEARCH

Personal Author(s) : Hsu,Olive Lee ; Bates,Clayton W , Jr

PDF Url : ADA118517

Report Date : Jan 1977

Pagination or Media Count : 71

Abstract : Photoluminescence in CsI(Na) was studied. This work used non-ionizing light sources and obtained the data from well-annealed, zone-refined specimens. A series of absorption excitation and emission spectra were measured at temperature between 300 K and 4.2 K. There are strong absorption bands on the long wavelength side of the fundamental absorption edge of the host CsI crystal. The excitation spectra are closely related to the absorption bands. The emission spectra consist of the characteristics blue emission and other low temperature emissions. The emission spectra were decomposed into the superposition of Gaussian peaks by computer. It is found for the first time that the characteristic emission consists of two bands, centered at 4200 A and 3700 A respectively. The latter one increased as the temperature decreased.

Descriptors :   *Cesium compounds, *Iodides, *Crystal structure, *Emission spectra, *Absorption spectra, Luminescence, Excitons, Excitation, Sodium chloride, Low temperature

Subject Categories : Nuclear Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE