Angular correlation of a pair of Lyman-α photons produced in the photodissociation of H2
Angular correlation of a pair of Lyman-α photons produced in the photodissociation of H2
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H2 光解离产生的一对 Lyman-α 光子的角相关性
DOI：
10.1103/physreva.90.043405
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and N. Kouchi
中科院分区：
文献类型：
--
作者：
Y. Nakanishi;K. Hosaka;R. Kougo;T. Odagiri;M. Nakano;Y. Kumagai;K. Shiino;M. Kitajima;and N. Kouchi
在 33.66 eV 入射光子能量和大约 0.1 和 1 Pa 的氢气压力下测量氢分子光解离过程中从 H 碎片发射的一对莱曼-α 光子的角相关函数 (ACF)。ACF 是针对两个光子探测器的相反和非相反排列进行测量的。事实证明，实验ACF既不涉及反应的贡献，也不涉及从⩾3)到H(片段)级联的贡献。因此，实验ACF是光解离后初级H(对的ACF。实验ACF与(i)H(原子纠缠对的理论ACF，其中每个氢原子的磁量子数不定)和(ii)具有确定磁量子数的H(对的理论ACF每个氢原子相对于核间轴的数量[H(pairs的前纠缠态是后一对具有确定磁量子数的对态的总和]。在(ii)中的理论ACF中，考虑了解离过程中H(pairs中的解纠缠。实验ACF在角度依赖性方面与理论ACF的纠缠H(pairs表现出类似的趋势。但是，这些实验和理论ACF之间的变化幅度仍然存在相当大的差异。对于每个氢原子相对于核间轴具有确定磁量子数的 H(对，ACF 在角度依赖性方面表现出与理论 ACF 相反的趋势。因此，我们得出结论，光解离中的 H(原子对不太可能处于每个氢原子相对于核间轴的磁量子数确定状态，即不太可能处于 H(对的纠缠态分量中。
The angular correlation functions (ACFs) of a pair of Lyman-α photons emitted from H fragments in the photodissociation of a hydrogen molecule are measured at a 33.66-eV incident photon energy and at hydrogen gas pressures of approximately 0.1 and 1 Pa. The ACFs are measured for both opposite and nonopposite arrangements of the two photon detectors. It turns out that the experimental ACFs involve neither the contribution of the reactionsnor the contribution of the cascade from⩾ 3) to H(fragments. Thus the experimental ACFs are those for primary H(pairs following the photodissociation of. The experimental ACFs are compared with (i) the theoretical ACF for entangled pairs of H(atoms, where the magnetic quantum number of each hydrogen atom is indefinite, and (ii) the theoretical ACF for H(pairs with definite magnetic quantum number of each hydrogen atom relative to the internuclear axis [the former entangled state of H(pairs is a sum of the latter pair states with definite magnetic quantum number]. In the theoretical ACF in (ii), the disentanglement in H(pairs during the dissociation is considered. The experimental ACFs show a similar tendency in angular dependence to the theoretical ACF for entangled H(pairs. However, there still remains a considerable difference in the variation magnitude between those experimental and theoretical ACFs. The experimental ACFs show the reverse tendency in angular dependence to the theoretical ACF for H(pairs with definite magnetic quantum number of each hydrogen atom relative to the internuclear axis. We thus conclude that the pair of H(atoms in the photodissociation ofis unlikely to be in the definite states of magnetic quantum number of each hydrogen atom relative to the internuclear axis, i.e., unlikely to be in the components of the entangled state of H(pairs.