本文系统地研究了对联三苯蒸气的荧光特性,测量了其吸收光谱、荧光光谱和荧光量子效率及其对温度、浓度,特别是激励波长的依赖关系,纠正了文献[2]报道的克分子消光系数值.本文提出了“脱宠子一内旋转效应”,借此能较合理地解释以对联三苯为代表的有机闪烁体蒸气的反常荧光特性.鉴于荧光量子效率对激励波长的强烈依赖关系,本文使用了氟化氪准分子激光在氢气中受激喇曼散射的第一级斯托克斯线和在甲烷中的第二级斯托克斯线泵浦对联三苯蒸气,但未能观察到激光输出.

The fluorescence characteristics of the para-terphenyl vapour have been studied systematically. Its absorption, fluorescence and spectra have been measured. The fluorescence quantum yield is dependent on temperature, concentration and especially exciting wavelength. We explain the unusual fluorescence characteristics of organic scintillator represented by para-terphenyl in terms of "The effect of de-cage and inner-rotation". The first order of the Stoke s line of stimulated Raman scattering of KrF laser in hydrogen gas and the second order of the Stoke's line in methane have been used to pump para-terphonyl vapoux. No laser output was observed.