Zn_2准分子的形成及其发射特性

FORMATION OF Zn_2 EXCIMER AND ITS EMISSION BEHAVIOR

通过光学抽运Zn(4s^1S_0—4p^3P_1)共振线,在充有惰性气体的Zn蒸气中观察到两个连续的发射谱带。实验辨认它们可能归属于Zn_2准分子~3∑_u^+态,这与理论预言一致。研究谱带的时间与温度特性,以及惰性气体对谱带发射的影响。给出分子形成速率的上限和猝灭速率。结果表明,惰性气体分子在Zn_2准分子的形成及衰变中起了主要作用。

Two emission bands of Zn2 excimers have been observed in mixture of Zn vapor and buffer gases by optically pumping Zn (4s^1S0-4p3P1) resonance line. Expe rimental evidence shows that they are possibly from the same 3∑_a^+ upper state of Zn2 excimer, this coincides with theoretical prediction. Their temporal and temperature behaviors, and also the effect of buffer gases were studied. The upper limits of molecular formation and quenching rate were determined separately. The rescults indicate that the buffer gases dominate the molecular formation and decay process.