A DISCHARGE-FLOW PHOTOIONIZATION MASS-SPECTROMETRIC STUDY OF THE BRO (X2-PI) RADICAL - PHOTOIONIZATION SPECTRUM AND IONIZATION-ENERGY

被引:29
作者
MONKS, PS
STIEF, LJ
KRAUSS, M
KUO, SC
KLEMM, RB
机构
[1] CTR ADV RES BIOTECHNOL,ROCKVILLE,MD 20850
[2] BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973
关键词
D O I
10.1016/0009-2614(93)87083-F
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The photoionization spectrum of BrO was measured over the wavelength range lambda = 106-122 nm using a discharge-flow photoionization mass spectrometer apparatus coupled to a synchrotron radiation source. BrO was generated by the reaction of O(3P) atoms with molecular bromine. A value of 10.46 +/- 0.02 eV was obtained for the adiabatic ionization energy of BrO from photoion thresholds, corresponding to the BrO+ (X 3SIGMA-)<--BrO(X 2PI3/2) transition. Spectra for both the (BrO)-Br-79 and (BrO)-Br-81 isotopes were very similar and the resultant photoion thresholds were identical, within experimental uncertainty. The structure observed in the spectra is discussed in terms of available states for BrO+, which have been calculated using MC-SCF methods.
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页码:416 / 420
页数:5
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