Transit Region Dynamics in the reative Hg^<**>(^3P_1)- H_2 Collisions

采用远翼激发和探针方法研究了Hg （^3P_1）与稀有气体原子和双原子分子碰撞的过渡区动力学。得到了以下结果：(1)测定了253.7nm处He、Ne、Ar、N_2、CO、H_2和D_2增宽的Hg共振线红翼和蓝翼的绝对吸收系数。从理论上研究了被氩加宽的汞共振线蓝翼的强制卫星结构。(2)将远翼泵浦探针（FEP）技术应用于N_2和CO拓宽的Hg共振线远翼，研究了Hg^<**>(^3P_1)+N_2、CO * Hg^<**>(^ 3p0)+N_2、CO等精细结构跃迁的过渡区动力学，并应用FEP技术研究了Hg^<**>(^3P_1)+H_2、D_2、HD * HgH、HgD(CHI_2SIGMA^+, v, j)+H、D等化学反应的过渡区动力学。结合(1)和(2)的结果，我们确定了碰撞准分子的过境区^^-和^^-衰变到上述碰撞过程的各个最终状态的概率。对于Hg^*- h_2反应性碰撞，发现^^-态产生HgH的效率是^^-态的3倍。我们已经得出结论，在HgH地层入口通道的^^态和^^态表面上都没有“早期”障碍。

Far-wing excitation and probe approach is employed to investigate the transit-region dynamics of the collisions of Hg (^3P_1) with the rare-gas atoms and the diatomic molecules. The following results are obtained :(1)The absolute absorption coefficients have been determined for the red- and blue-wings of the Hg resonance line at 253.7nm broadened by He, Ne, Ar, N_2, CO,H_2 and D_2. The unduratory satellite structures in the blue wing of the Hg resonance line broadened by Ar are investigated theoretically.(2)The far-wing pump and probe (FEP) technique has been applied to the far-wings of the Hg resonance line broadened by N_2 and CO to srudy the transit-region dynamics of the fine-structure transitions : Hg^<**>(^3P_1)+N_2, CO * Hg^<**>(^3P_0)+N_2, CO.The FEP technique has been also used to study the transit-region dynamics of the chemical reactions : Hg^<**>(^3P_1)+H_2, D_2, HD * HgH,HgD(CHI_2SIGMA^+, v, j)+H,D.Combining the results of (1) and (2), we have determined the probabilities for the transit regions ^^- and ^^- of the collisional quasimolecules to decay to the individual final states of the above collisional processes.As for the Hg^*-H_2 reactive collisiions, the ^^- state is found to be three times more effective in producing HgH than the ^^- state. We have concluded that no "early" barrior is expected on both of the ^^- state and ^^- state surfaces in the entrance channel of the HgH formation.