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Issue 20, 2000
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(2 + 1) Resonance-enhanced multiphoton ionization (REMPI) and (2 + 1′) mass-analyzed threshold ionization (MATI) spectroscopy of H2O

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Abstract

Rotationally resolved MATI spectra of H2O, recorded using two-colour (2 + 1′) multiphoton excitation [italic v (to differentiate from Times ital nu)]ia the [C with combining tilde] state, are reported. The spectroscopy provides a possible route to clean state-selection of rovibronic levels of the H2O+ ion. The rotational line intensities observed in the spectra are discussed in relation to previous photoelectron spectra and theoretical calculations. The observation of intense ΔKa = even transitions is attributed to a large contribution to the transition moment from an nf←nd component. Room temperature and jet-cooled (2 + 1) REMPI spectra of H2O are also reported for the region 80000–92000 cm−1. These involve two-photon transitions from the ground [X with combining tilde] 1A1 state to various vibrational levels of the [C with combining tilde] 1B1, [D with combining tilde]′ 1B1 and [D with combining tilde]″ 1A2 states as well as the first linear 1B2 state.

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Publication details

The article was received on 14 Jul 2000, accepted on 22 Aug 2000 and first published on 28 Sep 2000


Article type: Paper
DOI: 10.1039/B005717G
Citation: Phys. Chem. Chem. Phys., 2000,2, 4669-4675
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    (2 + 1) Resonance-enhanced multiphoton ionization (REMPI) and (2 + 1′) mass-analyzed threshold ionization (MATI) spectroscopy of H2O

    H. Dickinson, S. R. Mackenzie and T. P. Softley, Phys. Chem. Chem. Phys., 2000, 2, 4669
    DOI: 10.1039/B005717G

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