Research demonstrates ionization of helium atoms in plasma, implying new insights into laser-induced processes.
Abstract—It has been determined that the ionization of helium atoms in plasma formed during laser ablation of a tantalum target, immersed in superfluid helium, at a laser power density below the breakdown threshold of liquid helium occurs through the decay of the diatomic tetracation HeTa4+.
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Boltnev et al. (2026) studied this question.
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