Journal
CHINESE JOURNAL OF CHEMICAL PHYSICS
Volume 34, Issue 1, Pages 95-101Publisher
CHINESE PHYSICAL SOC
DOI: 10.1063/1674-0068/cjcp2010183
Keywords
Carbon disulfide; Time-sliced velocity map ion imaging; Photodissociation
Categories
Funding
- National Key R&D Program of China [2017YFF0104500]
- National Natural Science Foundation of China [21590802, 21473173]
- Strategic Priority Research Program of Chinese Academy of Sciences
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In this study, photodissociation dynamics of CS2 in the ultraviolet region were investigated using the time-sliced velocity map ion imaging technique, revealing S(P-3(J))+CS(X-1 sigma(+)) product channels. Anisotropic parameters and total kinetic energy releases of the products were derived, indicating a nonadiabatic process in the ultraviolet photodissociation of CS2.
We study the photodissociation dynamics of CS2 in the ultraviolet region using the time-sliced velocity map ion imaging technique. The S(P-3(J))+CS(X-1 sigma(+)) product channels were observed and identified at four wavelengths of 201.36, 203.10, 204.85 and 206.61 nm. In the measured images of S(P-3(J=2,1,0)), the vibrational states of the CS(X-1 sigma(+)) co-products were partially resolved and the vibrational state distributions were determined. Moreover, the product total kinetic energy releases and the anisotropic parameters were derived. The relatively small anisotropic parameter values indicate that the S(P-3(J=2,1,0))+CS(X-1 sigma(+)) channels are very likely formed via the indirect predissociation process of CS2. The study of the S(P-3(J=2,1,0))+CS(X-1 sigma(+)) channels, which come from the spin-orbit coupling dissociation process of CS2, shows that nonadiabatic process plays a role in the ultraviolet photodissociation of CS2.
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