Abstract
The electron binding energies and relaxation dynamics of water cluster anions (H 2O) n - (11 ≤ n ≤ 80) formed in co-expansions with neon were investigated using one-photon and time-resolved photoelectron imaging. Unlike previous experiments with argon, water cluster anions exhibit only one isomer class, the tightly bound isomer I with approximately the same binding energy as clusters formed in argon. This result, along with a decrease in the internal conversion lifetime of excited (H 2O) n - (25 ≤ n ≤ 40), indicates that clusters are vibrationally warmer when formed in neon. Over the ranges studied, the vertical detachment energies and lifetimes appear to converge to previously reported values.
Original language | English (US) |
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Article number | 094304 |
Journal | Journal of Chemical Physics |
Volume | 136 |
Issue number | 9 |
DOIs | |
State | Published - Mar 7 2012 |
Funding
This work was supported by the National Science Foundation (NSF) under Grant No. CHE-0649647. M.A.Y. acknowledges funding from a National Defense Science and Engineering Graduate (NDSEG) Fellowship through the Air Force Office of Scientific Research (AFOSR), 32 CFR 168a. S.B.K. is grateful for funding through an NSF Graduate Research Fellowship. We thank one of the referees for insightful comments about the evaporative ensemble model.
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry