Ion dip spectroscopy as a means of probing fast predissociating species: NH3 Ã1A''2 state

✍ Scribed by Jinchun Xie; Guohe Sha; Xiaoyuan Zhang; Cunhao Zhang

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 453 KB
• Volume: 124
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(86)85126-0

✦ Synopsis

Using NH, A'A'; state as an illustrative example, we have succeeded in developing ion dip spectroscopy mto an effective means of probing fast predissociating species that should be applicable to a large number of other interesting cases. The ion dip process we studied was a folded optical-optical double resonance: NH, .%+3hv, --t NH, C'-hv, -NH, A with ion detection. Based on our "composite" rotationally resolved spectra, band origins of the C-A transition and rotational constants for the NH, A u$' = 0, 1, 2 vibronic states are obtained, the latter with kO.06 cm-' accuracy. A lifetime for NH, A u;' = 1 level as short as 12Ok 10 fs (46 + 5 cm-' bandwidth) has been measured.