Surface explosion and subsequent core expansion of laser-heated clusters probed by time-resolved photoelectron spectroscopy

被引：2

作者：

Niozu, Akinobu ^{[1
,2
]}

Fukuzawa, Hironobu ^{[3
,4
]}

Hagiya, Toru ^{[1
]}

Yamamoto, Akifumi ^{[1
]}

You, Daehyun ^{[3
]}

Saito, Shu ^{[3
]}

Ishimura, Yudai ^{[3
]}

Togashi, Tadashi ^{[4
,5
]}

Owada, Shigeki ^{[4
,5
]}

Tono, Kensuke ^{[4
,5
]}

Yabashi, Makina ^{[4
,5
]}

Wada, Shin-ichi ^{[2
]}

Matsuda, Kazuhiro ^{[1
,6
]}

Ueda, Kiyoshi ^{[3
,4
]}

Nagaya, Kiyonobu ^{[1
,4
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[2] Hiroshima Univ, Grad Sch Adv Sci & Engn, Higashihiroshima 7398526, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[4] RIKEN SPring 8 Ctr, Sayo, Hyogo 6795148, Japan

[5] Japan Synchrotron Radiat Res Inst JASRI, Sayo, Hyogo 6795198, Japan

[6] Kumamoto Univ, Dept Phys, Kumamoto 8608555, Japan

来源：

PHYSICAL REVIEW A | 2022年 / 106卷 / 04期

基金：

日本学术振兴会;

关键词：

FREE-ELECTRON LASER; FEMTOSECOND; DYNAMICS; OPERATION; BEAMLINE; PULSES;

D O I：

10.1103/PhysRevA.106.043116

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：8

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