Author:
Marinakis Sarantos,Kalugina Yulia,Lique François
Abstract
Abstract
Hyperfine-resolved collisions between OH radicals and He atoms are investigated using
quantum scattering calculations and the most recent ab initio potential energy surface,
which explicitly takes into account the OH vibrational motion. Such collisions play an
important role in astrophysics, in particular in the modelling of OH masers. The
hyperfine-resolved collision cross sections are calculated for collision energies up to
2500 cm-1 from
the nuclear spin free scattering S-matrices using a recoupling technique. The
collisional hyperfine propensities observed are discussed. As expected, the results from
our work suggest that there is a propensity for collisions with ΔF = Δj.
The new OH−He hyperfine cross
sections are expected to significantly help in the modelling of OH masers from current and
future astronomical observations.
Graphical abstract
Publisher
Springer Science and Business Media LLC
Subject
Atomic and Molecular Physics, and Optics
Cited by
10 articles.
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