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<p><b>Abstract</b>—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 HeTa<sup>4+</sup>.</p>

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Helium Atom Ionization via the Decay of the Diatomic Tetracation HeTa4+ in Laser-Induced Plasma

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • R. E. Boltnev,
  • A. V. Karabulin,
  • I. N. Krushinskaya,
  • A. A. Pelmenev,
  • V. I. Matyushenko

摘要

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+.