Cheng Chuan, Singh Vaibhav, Matsika Spiridoula, Weinacht Thomas
Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York11794-3800, United States.
Department of Chemistry, Temple University, Philadelphia, Pennsylvania19122, United States.
J Phys Chem A. 2022 Oct 13;126(40):7399-7406. doi: 10.1021/acs.jpca.2c04650. Epub 2022 Sep 30.
We use covariance velocity map imaging of fragment ions from the strong field double ionization of formaldehyde in conjunction with trajectory surface hopping calculations to determine the ionization yields to different singlet and triplet states of the dication. The calculated kinetic energy release for trajectories initiated on different electronic states is compared with the experimental values based on momentum resolved covariance measurements. We determine the state resolved double ionization yields as a function of laser intensity and pulse duration down to 6 fs (two optical cycles).
我们使用甲醛强场双电离产生的碎片离子的协方差速度映射成像，并结合轨迹表面跳跃计算，来确定双离子不同单重态和三重态的电离产率。将基于不同电子态起始的轨迹计算得到的动能释放与基于动量分辨协方差测量的实验值进行比较。我们确定了态分辨双电离产率作为激光强度和脉冲持续时间（低至6飞秒，即两个光学周期）的函数。
