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 language | English |
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Pages (from-to) | 41-44 |
Number of pages | 4 |
Journal | Chemical Physics Letters |
Volume | 474 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 25 May 2009 |
Externally published | Yes |