Direct Observation of Ultrafast Dissociation Dynamics of (R–I){sub n}-Type Iodide Clusters as a Result of UV Excitation below the Ionization Threshold

Journal Article · Thu Dec 14 23:00:00 EST 2017 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776117120184· OSTI ID:22756167

Kompanets, V. O.; Lokhman, V. N.; Chekalin, S. V.; Ryabov, E. A. ^[1]

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1. Russian Academy of Sciences, Institute of Spectroscopy (Russian Federation)

The dynamics of dissociation of (IF{sub 2}CCOF){sub n}, (CF{sub 3}I){sub n}, and (CH{sub 3}I){sub n} clusters induced by femtosecond UV radiation (λ = 266 nm) is investigated. The method of UV excitation and photoionization probing (λ = 400 nm) combined with the time-of-flight mass spectrometry is applied. It is found that clusters excited to Rydberg states lying below the ionization threshold are decomposed, as a result of subsequent relaxation processes, giving rise to free neutral molecules. A mechanism of electronic–vibrational relaxation process is proposed, and data on the characteristic times of different stages of this process are obtained.

• OSTI ID: 22756167
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 125; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
DISSOCIATION
EXCITATION
MASS SPECTROSCOPY
METHYL IODIDE
RARE EARTHS
RESOURCES
RYDBERG STATES
TIME-OF-FLIGHT METHOD