Collision-induced dissociation of CO2+ cations: evidence for a long-lived excited state

Chawla, R. ; Krishnamurthy, M. ; Shukla, A..K. ; Futrell, J..H. (1999) Collision-induced dissociation of CO2+ cations: evidence for a long-lived excited state Chemical Physics Letters, 301 (5-6). pp. 531-536. ISSN 0009-2614

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/S0009-2614(99)00065-2

Abstract

Collision-induced dissociation of CO2+ ions formed by 70 eV electrons [CO2+ Ar, CO+Ar)O+ ] at 49 eV is translationally exothermic. The intensity distribution of O+ is symmetric about the Ar/O+ center-of-mass rather than that for Ar/CO2+, consistent with a spectator `knock-out' mechanism. We propose that 70 eV electron ionization produces a significant fraction of CO2+ ions in the a 4Πu state with a lifetime of more than 30 μsec and that collision induces curve-crossing between the 4Πu and 4Σg- states of CO2+. The process becomes endothermic at low electron energy, supporting the above conclusion.

Item Type:Article
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ID Code:102665
Deposited On:02 Feb 2018 04:37
Last Modified:02 Feb 2018 04:37

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