Dalgarno, Alexander2017-01-101967Dalgarno, A. 1967. “Atom—Atom Collision Processes in Astrophysics: Theoretical Studies.” Reviews of Modern Physics 39 (4) (October 1): 850–857. doi:10.1103/revmodphys.39.850.0034-6861http://nrs.harvard.edu/urn-3:HUL.InstRepos:29914192Theoretical studies of atom-atom collision processes which may be relevant to the interpretation of astrophysical phenomena are reviewed. Work on excitation, ionization, and electron capture in atomic hydrogen by fast protons and He+ ions is summarized. Processes involving slow collisions that are listed include radiative charge transfer and association, associative detachment, Penning ionization, spin-change, collision-induced deactivation, mutual neutralization, and rotational excitation.en-USJournal Article2017-01-1010.1103/RevModPhys.39.850