title: Collisional excitation of interstellar water.
abstract: Rates for rotational excitation of water molecules in collisions with He atoms have been obtained from a new, accurate theoretical interaction potential.  Rates among the lowest 40 ortho levels are given for kinetic temperatures to 1400 K and among the lowest 29 para levels for kinetic temperatures to 800 K.
authors.affiliation: Chemistry Department, Columbia University, USA.
authors.forename: A
authors.initials: A
authors.lastname: Palma
authors.forename: S
authors.initials: S
authors.lastname: Green
authors.forename: D J
authors.initials: DJ
authors.lastname: DeFrees
authors.forename: A D
authors.initials: AD
authors.lastname: McLean
mesh_terms: D004735:Energy Transfer; D005118:Extraterrestrial Environment; D006371:Helium / Q000032:analysis*; D008958:Models, Molecular; D013696:Temperature; D014867:Water / Q000032:analysis* / Q000737:chemistry*
chemical_list: D014867:Water; D006371:Helium