State-selected photodissociation dynamics of CS2+ in the C̃ 2Σg+ state

Autor:	Wan Goo Hwang, Myung Soo Kim, Hong Lae Kim
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Chemistry Photodissociation Polyatomic ion Mass spectrum Analytical chemistry General Physics and Astronomy Compounds of carbon Physical and Theoretical Chemistry Kinetic energy Dissociation (chemistry) Excitation Ion
Zdroj:	The Journal of Chemical Physics. 113:4153-4157
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.1288143
Popis:	State-selected photodissociation dynamics of CS2+ molecular ion has been investigated by an optical–optical double resonance technique. The CS2+ molecular ions were prepared by [2+1] REMPI and the predissociative C 2Σg+ state was populated by the B 2Σu+←X 2Πg,3/2 followed by C 2Σg+←B 2Σu+ transition. The product branching ratios, CS+/S+, for selected vibrational levels in the C state and average kinetic energy releases in the CS+ and S+ production channels were measured from the time-of-flight mass spectra. It has been found that excitation of the bending vibration enhances the CS+ production channel more than the S+ channel. In addition, an isotropic fragment distribution for different polarizations of the dissociating laser light has been observed, from which the dissociation time was estimated to be longer than 20 ps. Dynamical aspect of the reaction revealed by the present investigation is discussed together with the previous spectroscopic results.
Databáze:	OpenAIRE
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