期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 122, 期 21, 页码 4779-4784出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.8b01248
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资金
- German Science Foundation (DFG) [GRK 1355, SFB 925]
- Hamburg Centre for Ultrafast Imaging (CUI)
Rydberg excitations in the vacuum ultraviolet spectral range may open up molecular photoreaction pathways not accessible from lower-lying valence states. Here, single-shot UV/VUV pump-probe spectroscopy was used to study the photodissociation dynamics of iodomethane after 268 nm excitation in the A-band and excitation of the 6p (E-2(3/2)) Rydberg state at 161 nm. By combining weak-field VUV single-photon ionization with sub-10 fs temporal resolution and the superior statistical accuracy of the single-shot technique, sub-30 fs wave packet dynamics upon excitation in the A-band by a UV pump pulse were disclosed. Population transfer from the Rydberg state to the 2 (1)A(1) valence state leading to 100 fs dissociation dynamics was observed by utilizing the same methodology in a VUV-pump/UV-probe scheme.
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