Non-adiabatic coupling as a frictional force in the formation of H3+: a model dynamical study Satyam Ravi, Soumya Mukherjee, Bijit Mukherjee, Satrajit Adhikari, Narayanasami Sathyamurthy and Michael Baer Eur. Phys. J. D, 74 12 (2020) 239 Published online: 08 December 2020 DOI: 10.1140/epjd/e2020-10152-2