Abstract
Over a wide and partly overlapping energy range, the single-electron capture crosssections for collisions of metastable Sn2+(5s5p
3P
o
) (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.
3P
o
) (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.
| Original language | English |
|---|---|
| Article number | 9 |
| Number of pages | 11 |
| Journal | Atoms |
| Volume | 12 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1-Feb-2024 |