title: Cross sections for the formation of H(n = 2) atom via superexcited states in photoexcitation of methane and ammonia.
abstract: The absolute cross sections for the formation of the H(2s) and H(2p) atoms, σ2s and σ2p, respectively, in photoexcitation of CH4 and NH3 were measured in the range of the incident photon energy 15-48 eV for studying superexcited states of the molecules. The same superexcited states were found to contribute to the σ2s and σ2p cross sections. It was concluded that the non-adiabatic transitions play a significant role during the dissociation of the superexcited states and ionic states.
authors.affiliation: Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Kumagai
authors.forename: Takeshi
authors.initials: T
authors.lastname: Odagiri
authors.forename: Motoyoshi
authors.initials: M
authors.lastname: Nakano
authors.forename: Takehiko
authors.initials: T
authors.lastname: Tanabe
authors.forename: Isao H
authors.initials: IH
authors.lastname: Suzuki
authors.forename: Kouichi
authors.initials: K
authors.lastname: Hosaka
authors.forename: Masashi
authors.initials: M
authors.lastname: Kitajima
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Kouchi