Accession Number : AD0259662

Title :   SOME LUMINESCENT PROPERTIES OF THE MIXED PHENYL- AND P-BIPHENYLYL-SUBSTITUTED SILANES UNDER ULTRA-VIOLET, GAMMA AND BETA EXCITATION

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : WEIS,CARL GRAHAM

Report Date : MAR 1961

Pagination or Media Count : 1

Abstract : Luminescent properties of triphenyl-p-biphenylylsilane (silane I), biphenyl-di-p-biphenylylsilane (silane II) and phenyl-tri-p-biphenylylsilane (silane III) have been investigated. In comparing these phosphors with anthracene the following results were obtained: (a) Silane I is 8% less effective than anthracene in its gamma detecting ability. (b) The pulse height of the silanes is about 40% - 45% that of anthracene. (c) Each of the silanes is about 70% as efficient a beta detector as anthracene. Fluorescence spectra for each of the silanes under ultraviolet and beta stimulation are reported. Peak emission wave-lengths are 400, 400, and 450 millimicrons for Silane I, II, and III respectively. Fluorescence decay constants of 2.53-2.54, 2.62-2.63 and 3.29-3.31 nanoseconds were found for Silane I, II, and III. (Author)

Descriptors :   *LUMINESCENCE, *PHENYL RADICALS, *RADIATION MEASURING INSTRUMENTS, *SILICON COMPOUNDS, ANTHRACENES, BETA COUNTERS, BETA PARTICLES, EXCITATION, FLUORESCENCE, GAMMA COUNTERS, PHOSPHORESCENT MATERIALS, PULSE HEIGHT ANALYZERS, SCINTILLATION COUNTERS, SILANES, ULTRAVIOLET RADIATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE