Abstract
Abstract
Using electron and ion spectroscopy, we studied the electron and nuclear dynamics in ∼50 000-atom large krypton clusters, following excitation with an intense hard x-ray pulse. Beyond the single pulse experiment, we also present the results of a time-resolved, x-ray pump–near-infrared probe measurement that allows one to learn about the time evolution of the system. After core ionization of the atoms by x-ray photons, trapped Auger and secondary electrons form a nanoplasma in which the krypton ions are embedded, according to the already published scenario. While the ion data show expected features, the electron emission spectra miss the expected pump–probe delay-dependent enhancement except for a slight enhancement in the energy range below 2 eV. Theoretical simulations help to reveal that, due to the deep trapping potential of the ions during the long time expansion accompanied by electron–ion recombination, thermal emission from the transient nanoplasma becomes quenched.
Funder
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
IMRAM project
Network Joint Research Center for Materials and Devices
National Nature Science Foundation of China
Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials
RIKEN
IMRAM, Tohoku University
Subject
Condensed Matter Physics,Atomic and Molecular Physics, and Optics
Cited by
6 articles.
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