Elucidation of Molecular Origin of Ozone Deficit

我们推测臭氧赤字是由振动激发的氧分子与周围的氧分子在基态反应产生臭氧引起的。为了检验这种可能性，我们绘制了哈特利带中臭氧光解作用产生的高振动激发氧分子的产率图。在三维大气模式计算中利用了这样测量的产量来证明该通道作为臭氧亏缺源的可能性。另一方面，最近的量子化学计算表明，虽然尚未得出结论，但振动激发的氧分子的快速消失不是化学反应，而是振动弛豫。这表明我们需要更广泛地寻找臭氧赤字的其他潜在来源。一种可能是在平流层中O （1D）与氢化物的反应中存在未探明的特征。为了解决这一问题，我们构建了一种具有高分辨率成像探测器的交叉分子束装置。研制的仪器使我们能够在比以前短得多的时间内研究感兴趣的反应，加速研究与大气问题有关的反应。

We have speculated that the ozone deficit is caused by ozone production via the reaction of vibrationally - excited oxygen molecule with surrounding oxygen molecule at the ground state . In order to examine this possibility , we mapped out the yield of highly vibrationally - excited oxygen molecules produced by photodissociation of Ozone in the Hartley band . The yield thus measured has been utilized in three dimensional atmospheric model calculation to demonstrate the possibility of this channel as the source of Ozone deficit . On the other hand , recent quantum chemical calculations show , although not yet concluded , that the rapid disappearance of vibrationally - excited oxygen molecule is not chemical reaction but to vibrational relaxation . This suggests that we need to look for other potential source of Ozone deficit more extensively . One possibility is that there exist unexplored feature in the reaction of O (1D) with hydrides in the stratosphere . In order to address this problem , we have constructed a new crossed molecular beam apparatus with high resolution imaging detector . The developed apparatus allows us to study the reaction of interest in much shorter time than before , acceleration investigation of reactions relevant to atmospheric problems .