Surface explosion and subsequent core expansion of laser-heated clusters probed by time-resolved photoelectron spectroscopy
Surface explosion and subsequent core expansion of laser-heated clusters probed by time-resolved photoelectron spectroscopy
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通过时间分辨光电子能谱探测激光加热团簇的表面爆炸和随后的核心膨胀
DOI：
10.1103/physreva.106.043116
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发表时间：
2022
影响因子：
2.9
通讯作者：
Nagaya Kiyonobu
中科院分区：
文献类型：
--
作者：
Niozu Akinobu;Fukuzawa Hironobu;Hagiya Toru;Yamamoto Akifumi;You Daehyun;Saito Shu;Ishimura Yudai;Togashi Tadashi;Owada Shigeki;Tono Kensuke;Yabashi Makina;Wada Shin-ichi;Matsuda Kazuhiro;Ueda Kiyoshi;Nagaya Kiyonobu
用时间分辨软X射线光电子能谱研究了强近红外脉冲产生的纳米等离子体的动力学。泵浦-探测电子能谱显示了等离子体形成和解体过程中组成原子和离子的电子态的瞬时演化。光电子产额的延迟依赖关系支持激光加热团簇的两步碎裂，即表面离子的快速爆炸和中性原子的缓慢膨胀。通过将实验数据与中性核均匀膨胀模型进行比较，评估了中性核膨胀的速度。
The dynamics of nanoplasma produced by an intense near-infrared pulse was investigated by time-resolved soft x-ray photoelectron spectroscopy. The pump-probe electron spectra indicate transient evolution of the electronic states of the constituent atoms and ions during plasma formation and disintegration. The delay dependence of photoelectron yields supports two-step fragmentation of laser-heated clusters, i.e., rapid explosion of surface ions followed by slow expansion of neutral atoms. The speed of the neutral core expansion was evaluated by comparing the experimental data with a model of uniform neutral core expansion.