Sándor Péter, Tagliamonti Vincent, Zhao Arthur, Rozgonyi Tamás, Ruckenbauer Matthias, Marquetand Philipp, Weinacht Thomas
Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA.
Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, Budapest 1117, Hungary.
Phys Rev Lett. 2016 Feb 12;116(6):063002. doi: 10.1103/PhysRevLett.116.063002. Epub 2016 Feb 9.
We study strong-field molecular ionization as a function of pulse duration. Experimental measurements of the photoelectron yield for a number of molecules reveal competition between different ionization continua (cationic states) which depends strongly on pulse duration. Surprisingly, in the limit of short pulse duration, we find that a single ionic continuum dominates the yield, whereas multiple continua are produced for longer pulses. Using calculations which take vibrational dynamics into account, we interpret our results in terms of nuclear motion and nonadiabatic dynamics during the ionization process.
我们研究强场分子电离作为脉冲持续时间的函数。对多种分子的光电子产率进行的实验测量揭示了不同电离连续体（阳离子态）之间的竞争，这种竞争强烈依赖于脉冲持续时间。令人惊讶的是，在短脉冲持续时间的极限情况下，我们发现单一离子连续体主导产率，而对于较长脉冲则会产生多个连续体。通过考虑振动动力学的计算，我们根据电离过程中的核运动和非绝热动力学来解释我们的结果。
