期刊
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
卷 47, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-4075/47/12/124016
关键词
photoelectron spectroscopy; Rydberg-valence coupling; velocity map imaging; femtosecond vacuum UV laser source
资金
- Marie Curie Research Training Networks ATTOFEL
- Deutsche Forschungsgemeinschaft [LU 1638/1-1]
We investigate non-adiabatic dynamics of NO molecules that are photo-excited in the vacuum ultraviolet photon energy range using time-resolved velocity map imaging. Highly excited valence and Rydberg states are populated with a tunable (147-151 nm) femtosecond laser pulse and then ionized by a time-delayed near-IR laser pulse. Three main contributions are observed in the photoelectron kinetic spectra with corresponding electron yields that show pronounced oscillations. Two oscillations are assigned to ro-vibronic coupling in the valence-Rydberg mixture of the B-'2 Delta (v = 7) and 4d delta N-2 Delta (v = 0) states and the B-2 Pi (v = 25) and 4p pi K-2 Pi (v = 1) states, respectively. We assign a third oscillation to originate from a coupling between two Rydberg states.
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