论文标题
丙烷氧化物的双光电离：一对价壳电子的弹出的巧合研究
Double photoionization of propylene oxide: a coincidence study of the ejection of a pair of valence-shell electrons
论文作者
论文摘要
最近在星际空间中发现了丙烷氧化物，这是圆形二色性实验和理论研究的最喜欢的靶标，进一步扩大了其在当前关于原生综合学的辩论中的作用的关注。在目前的工作中，在18.0-37.0 EV能量范围内使用一个离子成像探测器和可调同步子辐射，使用的光电 - 光谱辐射技术，（i） - 观察六个双离子化碎片通道，它们的相对产率是由六个双重离子来观察的（i），它们的相对屈服是由六个双重离数来观察的。 （C2H3+，CH3O+）; （ii） - 测量其开口的阈值作为光子能量的函数； （iii） - 要揭开动力学释放分布的明显双峰性，这是竞争性非绝热机制的指纹。
Propylene oxide, a favorite target of experimental and theoretical studies of circular dichroism, was recently discovered in interstellar space, further amplifying the attention to its role in the current debate on protobiological homochirality. In the present work, a photoelectron-photoion-photoion coincidence technique, using an ion-imaging detector and tunable synchrotron radiation in the 18.0-37.0 eV energy range, permits: (i)-to observe six double-ionization fragmentation channels, their relative yields being accounted for about two-thirds by the couple (C2H4+, CH2O+), one-fifth by (C2H3+, CH3O+); (ii)-to measure thresholds for their openings as a function of photon energy; (iii)-to unravel a pronounced bimodality for a kinetic-energy-released distribution, fingerprint of competitive non-adiabatic mechanisms.
