Synchrotron photoionization measurements of combustion intermediates: the photoionization efficiency of HONO
- Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551
The HONO radical has recently been observed by photoionization mass spectrometry in low-pressure hydrogen-oxygen flames doped with NO2. The photoionization efficiency (PIE) spectrum has been measured between 10.83 and 11.63 eV. A Franck-Condon simulation using calculated geometries and force constants of the cation and neutral, and including the effects of Duschinsky rotation, is presented to describe the PIE as a function of photon energy. The simulated PIE is used as a fitting function to estimate the adiabatic ionization potential from the experimental data. The apparent ionization threshold of (10.97 +/- 0.03) eV is in excellent agreement with calculated values and is consistent with published bracketing determinations of the proton affinity of NO2.
- Research Organization:
- Cornell Univ., Ithaca, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- FG02-01ER15180
- OSTI ID:
- 1062555
- Report Number(s):
- DOE-ER15180-37
- Journal Information:
- Chemical Physics Letters, Journal Name: Chemical Physics Letters Journal Issue: 1-3 Vol. 394; ISSN 0009-2614
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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