Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany.
Phys Rev Lett. 2011 Nov 4;107(19):193003. doi: 10.1103/PhysRevLett.107.193003. Epub 2011 Nov 3.
We present the results of a Coulomb explosion experiment that allows for the imaging of the rovibrational wave function of the metastable H2- ion. Our measurements confirm the predicted large internuclear separation of 6 a.u., and they show that the ion decays by autodetachment rather than by spontaneous dissociation. Imaging of the resulting H2 products reveals a large angular momentum of J = 25 ± 2, quantifying the rotation that leads to the metastability of this most fundamental molecular anion.
我们呈现了一项库仑爆炸实验的结果，该实验可对亚稳态 H2- 离子的振转波函数进行成像。我们的测量结果证实了预测的大核间距 6 埃，并且表明离子通过自动脱离而不是自发解离来衰变。对所得 H2 产物的成像显示出较大的角动量 J = 25 ± 2，这定量地描述了导致这种最基本的分子阴离子亚稳定性的旋转。
