Cross sections for the formation of H(n = 2) atom via superexcited states in photoexcitation of methane and ammonia

Yoshiaki Kumagai; Takeshi Odagiri; Motoyoshi Nakano; Takehiko Tanabe; Isao H Suzuki; Kouichi Hosaka; Masashi Kitajima; Noriyuki Kouchi

doi:10.1063/1.4826460

Cross sections for the formation of H(n = 2) atom via superexcited states in photoexcitation of methane and ammonia

J Chem Phys. 2013 Oct 28;139(16):164307. doi: 10.1063/1.4826460.

Authors

Yoshiaki Kumagai¹, Takeshi Odagiri, Motoyoshi Nakano, Takehiko Tanabe, Isao H Suzuki, Kouichi Hosaka, Masashi Kitajima, Noriyuki Kouchi

Affiliation

¹ Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan.

PMID: 24182029
DOI: 10.1063/1.4826460

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.