Scintillations in the Diphenylpolyenes and Related Compounds

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Abstract
Scintillations in two series of structurally related organic compounds were investigated. One series was composed of the symmetrical diphenyl derivatives of ethane, ethylene, and acetylene. The other series consisted of the diphenyl polyenes from diphenyl to diphenyl octatetraene. In the first series it was found that the wavelength of the emission spectra ranged from 3550 to 4030A and the counting efficiency increased with the number of π-electrons in the system. In the second series the emission spectra wavelengths ranged from 3400A to 6000A and increased as one went up the series, whereas the counting efficiency went through a maximum at diphenyl butadiene. The results were interpreted in terms of the ``metallic'' model for conjugated compounds.

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