1. Excitation dynamics involving homogeneous multistate interactions: one and two color VMI and REMPI of HBr
- Author
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Hua Sheng Wang, Peter C. Samartzis, Dimitris Zaouris, Helgi Rafn Hróðmarsson, Pavle Glodic, Andreas Kartakoullis, and Ágúst Kvaran
- Subjects
010304 chemical physics ,Chemistry ,Dynamics (mechanics) ,Analytical chemistry ,General Physics and Astronomy ,Photoionization ,010402 general chemistry ,Kinetic energy ,Quantum number ,01 natural sciences ,Spectral line ,0104 chemical sciences ,symbols.namesake ,Excited state ,0103 physical sciences ,Rydberg formula ,symbols ,Physical and Theoretical Chemistry ,Atomic physics ,Excitation - Abstract
Velocity map imaging (VMI) data and mass resolved REMPI spectra are complementarily utilized to elucidate the involvement of homogeneous multistate interactions in excited state dynamics of HBr. The H1Σ+(v′ = 0) and E1Σ+(v′ = 1) Rydberg states and the V1Σ+(v′= m + 7) and V1Σ+(v′= m + 8) ion-pair states are explored as a function of rotational quantum number in the two-photon excitation region of 79 100–80 700 cm−1. H+ and Br+ images were recorded by one- as well as two-color excitation schemes. Kinetic energy release (KER) spectra and angular distributions were extracted from the data. Strong-to-medium interactions between the E(1) and V(m + 8)/V(m + 7) states on one hand and the H(0) and V(m + 7)/V(m + 8) states on the other hand were quantified from peak shifts and intensity analysis of REMPI spectra. The effects of those interactions on subsequent photoionization and photolytic pathways of HBr were evaluated in one-color VMI experiments of the H+ and two-color VMI experiments of the Br+ photoproducts.
- Published
- 2017