Complete photo-fragmentation of the deuterium molecule
Complete photo-fragmentation of the deuterium molecule
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DOI：
10.1038/nature02839
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发表时间：
2004-09-23
期刊：
影响因子：
64.8
通讯作者：
Dörner, R
中科院分区：
文献类型：
--
作者：
Weber, T;Czasch, AO;Dörner, R
分子的所有性质--从结合能和激发能到它们的几何形状--都由电子和原子核的高度相关的初态波函数决定。这些相互关系的细节可以通过研究这些系统分解成它们的组成部分来揭示。碎裂可以通过吸收单个光子(1-6)，通过与带电粒子(7，8)的碰撞或通过暴露在强激光脉冲(9，10)中来启动：如果充分了解引起激发的相互作用，则可以将碎裂过程用作研究束缚初始态(11，12)的工具。因此，相互作用和由此产生的碎片运动对量子理论构成了巨大的挑战(13-15)。在这里，我们报告了双核动量和双电子动量的符合测量，这些动量来自于单光子诱导的氚分子碎裂。结果表明，在吸收光子的瞬间，电子的相关运动强烈依赖于分子基态中的核间距。
All properties of molecules - from binding and excitation energies to their geometry - are determined by the highly correlated initial-state wavefunction of the electrons and nuclei. Details of these correlations can be revealed by studying the break-up of these systems into their constituents. The fragmentation might be initiated by the absorption of a single photon(1-6), by collision with a charged particle(7,8) or by exposure to a strong laser pulse(9,10): if the interaction causing the excitation is sufficiently understood, the fragmentation process can then be used as a tool to investigate the bound initial state(11,12). The interaction and resulting fragment motions therefore pose formidable challenges to quantum theory(13-15). Here we report the coincident measurement of the momenta of both nuclei and both electrons from the single-photon-induced fragmentation of the deuterium molecule. The results reveal that the correlated motion of the electrons is strongly dependent on the inter-nuclear separation in the molecular ground state at the instant of photon absorption.