Tunable VUV photochemistry using Rydberg H-atom time-of-flight spectroscopy

Kaijun Yuan; Lina Cheng; Yuan Cheng; Qing Guo; Dongxu Dai; Xueming Yang

doi:10.1063/1.2999545

Tunable VUV photochemistry using Rydberg H-atom time-of-flight spectroscopy

Rev Sci Instrum. 2008 Dec;79(12):124101. doi: 10.1063/1.2999545.

Authors

Kaijun Yuan¹, Lina Cheng, Yuan Cheng, Qing Guo, Dongxu Dai, Xueming Yang

Affiliation

¹ State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.

PMID: 19123580
DOI: 10.1063/1.2999545

Abstract

In this article, we report an experimental method for studying tunable vacuum ultraviolet (VUV) photochemistry using the H-atom Rydberg tagging technique. In this method, two VUV laser light beams were generated using nonlinear four-wave mixing scheme in a single Kr gas cell: one VUV beam is fixed at the 121.6 nm wavelength to probe the H-atom product through the Lyman alpha transition, the other beam can be tunable for photodissociating molecules in the wavelength range lambda(VUV)=121-190 nm. Preliminary results on the H(2)O photodissociation in the B state are reported here. These results suggest that the experimental method is a powerful tool for investigating photodissociation dynamics in the VUV region for molecules involving H-atom processes.