超激发氦纳米液滴的完整弛豫动力学解析
原子与分子团簇
2021-08-04 v1
摘要
借助极紫外(XUV)飞秒电子与离子谱学并结合含时密度泛函理论(TDDFT),对超激发超流体He纳米液滴的弛豫动力学进行了深入研究。识别出导致电子与离子发射的三条主要路径:液滴自电离、泵浦-探测光电离,以及由弛豫至液滴电离阈值以下能级的液滴再激发所诱导的自电离。液滴自电离与光电离最丰富的产物均为He,而He的延迟出现则表明液滴中受激He原子被弹出。态分辨的含时光电子能谱揭示,在弛豫过程中液滴的中间激发态被占据,并最终终止于最低位的亚稳态单重态与三重态He原子态。三重态相较单重态略快的弛豫与模拟一致,模拟显示三重态He原子周围气泡形成更快。
引用
@article{arxiv.2103.05948,
title = {Unravelling the Full Relaxation Dynamics of Superexcited Helium Nanodroplets},
author = {Jakob D. Asmussen and Rupert Michiels and Katrin Dulitz and Aaron Ngai and Ulrich Bangert and Manuel Barranco and Marcel Binz and Lukas Bruder and Miltcho Danailov and Michele Di Fraia and Jussi Eloranta and Raimund Feifel and Luca Giannessi and Marti Pi and Oksana Plekan and Kevin C. Prince and Richard J. Squibb and Daniel Uhl and Andreas Wituschek and Marco Zangrando and Carlo Callegari and Frank Stienkemeier and Marcel Mudrich},
journal= {arXiv preprint arXiv:2103.05948},
year = {2021}
}