Photo-double ionization of water studied by threshold photoelectrons coincidence spectroscopy

S. Y. Truong, A. J. Yencha*, A. M. Juarez, S. J. Cavanagh, P. Bolognesi, G. C. King

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Photo-double ionization of gaseous water has been investigated in the 30-53 eV energy range using synchrotron radiation and the threshold photoelectrons coincidence (TPEsCO) method. The TPEsCO spectrum of H2O, encompassing the formation of the over(X, ̃) 3B1, 1 1A1, over(b, ̃) 1B1 and 2 1A1 states of H2O2+, was recorded. The TPEsCO spectrum is very broad with no discernable vibrational structure. In addition, the TPE spectrum of H2O for the formation of H2O+ was recorded simultaneously. Indirect double ionization of H2O by dissociative autoionization of H2O+ is found to play a major role in the TPEsCO spectrum well below the lowest vertical double IP.

Original languageEnglish
Pages (from-to)41-44
Number of pages4
JournalChemical Physics Letters
Volume474
Issue number1-3
DOIs
Publication statusPublished - 25 May 2009
Externally publishedYes

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