期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 6, 期 11, 页码 3028-3034出版社
WILEY-BLACKWELL
DOI: 10.1002/asia.201100458
关键词
carbon disulfide; photochemistry; photoelectron spectroscopy; photoionization; wave packet dynamics
资金
- Grants-in-Aid for Scientific Research [23750012] Funding Source: KAKEN
The ultrafast dynamics of CS2 in the B-1(2)((1)Sigma(+)(u)) state was studied by photoelectron imaging with a time resolution of 22 fs. The photoelectron signal intensity exhibited clear vibrational quantum beats due to wave packet motion. The signal intensity decayed with a lifetime of about 400 fs. This decay was preceded by a lag of around 30 fs, which was considered to correspond to the time for a vibrational wave packet to propagate from the Franck-Condon region to the region where predissociation occurred. The photoelectron angular distribution remained constant when the pump-probe delay time was varied. Consequently, variation of the electronic character caused by the vibrational wave packet motion was not identified within the accuracy of our measurements.
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