Ionization of water molecules by light generates free electrons in liquid water. After generation, the so-called solvated electron is formed, a localized electron surrounded by a shell of water molecules. In the ultrafast localization process, the electron and its water shell display strong oscillations, giving rise to terahertz emission for tens of picoseconds.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/3bfoeSM
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