Electron Capture from Molecular Hydrogen by Metastable Sn2+* Ions

Klaas Bijlsma, Lamberto Oltra, Emiel de Wit, Luc Assink, Ismanuel Rabadán, Luis Méndez, Ronnie Hoekstra*

*Corresponding author voor dit werk

OnderzoeksoutputAcademicpeer review

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Over a wide and partly overlapping energy range, the single-electron capture crosssections for collisions of metastable Sn2+(5s5p
) (Sn2+∗
) ions with H2 molecules were measured
(0.1–10 keV) and calculated (0.3–1000 keV). The semi-classical calculations use a close-coupling
method on a basis of electronic wavefunctions of the (SnH2)
2+ system. The experimental crosssections were extracted from double collisions in a crossed-beam experiment of Sn3+ with H2. The
measured capture cross-sections for Sn2+∗
show good agreement with the calculations between
2 and 10 keV, but increase toward lower energies, whereas the calculations decrease. Additional
Landau–Zener calculations were performed and show that the inclusion of spin-orbit splitting cannot
explain the large cross-sections at the lowest energies which we now assume to be likely due to
vibrational effects in the molecular hydrogen target.
Originele taal-2English
Aantal pagina's11
Nummer van het tijdschrift2
StatusPublished - 1-feb.-2024


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