title: Nuclear motion captured by the slow electron velocity imaging technique in the tunnelling predissociation of the S1 methylamine.
abstract: Predissociation dynamics of methylamines (CH(3)NH(2) and CH(3)ND(2)) on the first electronically excited states are studied using the slow-electron velocity imaging method to unravel the multi-dimensional nature of the N-H(D) chemical bond dissociation reaction which occurs via tunnelling. The nearly free internal rotation around the C-N bond axis is found to be strongly coupled to the reaction pathway, revealing nuclear motions actively involved in the tunnelling process on the S(1) potential energy surfaces. The vibrational state-resolved energy and angular distributions of photoelectron, ejected from the ionization mediated by the metastable intermediate S(1) state provide a unique way for mapping the predissociative potential energy surfaces.
authors.affiliation: Department of Chemistry, KAIST, Daejeon 305-701, South Korea.
authors.forename: Doo-Sik
authors.initials: DS
authors.lastname: Ahn
authors.forename: Jeongmook
authors.initials: J
authors.lastname: Lee
authors.forename: Young Choon
authors.initials: YC
authors.lastname: Park
authors.forename: Yoon Sup
authors.initials: YS
authors.lastname: Lee
authors.forename: Sang Kyu
authors.initials: SK
authors.lastname: Kim
mesh_terms: D004583:Electrons; D008744:Methylamines / Q000737:chemistry*; D009038:Motion; D011789:Quantum Theory
chemical_list: D008744:Methylamines; C027451:methylamine