Breaking space-inversion symmetry in the dynamics of the doubly excited Q21Πu(1) state of HD
Breaking space-inversion symmetry in the dynamics of the doubly excited Q21Πu(1) state of HD
复制标题
HD双激发Q21πu(1)态动力学中打破空间反演对称性
DOI：
10.1103/physreva.99.033423
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发表时间：
2019
影响因子：
2.9
通讯作者：
Kouchi Noriyuki
中科院分区：
文献类型：
--
作者：
Hosaka Kouichi;Torizuka Yutaro;Schmidt Philipp;Knie Andre;Ehresmann Arno;Odagiri Takeshi;Kitajima Masashi;Kouchi Noriyuki
在绝对尺度上形成一对原子的一组截面是根据同位异构体的双光激发中的入射光子能量Hd确定的，并且结合了在我们最近的实验中获得的相同的截面[K.Hosaka，Phys.Rev.A93,063423(063423)2469-992610.1103/PhysRevA.93.063423]，以及从前驱态形成一对原子的振子强度。考虑到HD和光激发分子的相同的衰变机制，我们发现HD的振子强度比预期值要大，这是我们最近为上述实验揭示的一种机制。讨论了HD振子强度增强的原因，结果表明，这种增强是通过在Born-Oppenheimer近似中忽略的一项在同核同位素(和)中消失而不是在异核同位素(HD)中消失的非绝热电子态与非Gerade电子态的跃迁所致。结果表明，由于电子的空间反转对称性的破坏，大约10%-20%的原子来自这种非绝热跃迁。
A set of cross sections for the formation of a pair ofatoms on an absolute scale is determined against the incident photon energy in the double photoexcitation of the isotopomers, HD, and, incorporating the same cross sections ofandobtained in our recent experiments [K. Hosaka , Phys. Rev. A 93, 063423 (2016)2469-992610.1103/PhysRevA.93.063423], and the oscillator strengths for the formation of a pair ofatoms from the precursorstate,, are determined from the cross sections. The oscillator strength of HD,, is found to be larger than the value expected from, considering the same decay mechanism for, HD, andmolecules photoexcited to thestate, a mechanism which was revealed in our recent experiments forandmentioned above. The origin of the enhancement in the oscillator strength for HD is discussed and we show that the enhancement is attributed to nonadiabatic transitions between a gerade electronic state and an ungerade one through a term neglected in the Born-Oppenheimer approximation that vanishes in the homonuclear isotopomers (and) but does not vanish in the heteronuclear isotopomer (HD). It turns out that approximately 10–20 % oforiginates from such nonadiabatic transitions due to the breaking of the space-inversion symmetry for electrons.