Ionization of Helium Atoms by Triply Charged Metal Atoms during Laser Ablation of Metals in Superfluid Helium

R. E. Boltnev; Болтнев Р. Е.; A. V. Karabulin; Карабулин А. В.; I. N. Krushinskaya; Крушинская И. Н.; A. A. Pelmenev; Пельменёв А. А.; V. I. Matyushenko; Матюшенко В. И.

doi:10.31857/S0023119323020067

Ionization of Helium Atoms by Triply Charged Metal Atoms during Laser Ablation of Metals in Superfluid Helium

Authors: Boltnev R.E.¹^,2, Karabulin A.V.¹^,3, Krushinskaya I.N.², Pelmenev A.A.², Matyushenko V.I.²
Affiliations:
1. Joint Institute for High Temperatures, Russian Academy of Sciences
2. Branch of Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences
3. Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences
Issue: Vol 57, No 2 (2023)
Pages: 161-166
Section: ЛАЗЕРОХИМИЯ
URL: https://journals.rcsi.science/0023-1193/article/view/140017
DOI: https://doi.org/10.31857/S0023119323020067
EDN: https://elibrary.ru/NGSRUI
ID: 140017

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Abstract
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Abstract

The applicability of laser ablation of metal targets for obtaining triply charged ions of metal atoms, including low-melting metals, has been experimentally demonstrated. By analyzing the luminescence spectra of a plasma plume during laser ablation of a metal target immersed in superfluid helium, the main channel for the formation of helium ions in plasma at a laser beam power density below the breakdown threshold of the helium medium has been determined. It has been shown that the ionization of helium atoms occurs in two steps, the formation of the HeM3+ ionic complex and the dissociation of the complex via its interaction with a metal atom.

Keywords

helium, plasma, ions, luminescence, spectroscopy, laser ablation

References

NIST Atomic Spectra Database, NIST Standard Reference Database 78, https://physics.nist.gov/PhysRefData/ASD/ionEnergy.html
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