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CHRISTIAN O. UIBEL, Fachbereich 9--Physikalische Chemie, Bergische Universität--Gesamthoch-schule Wuppertal, 42097 Wuppertal, Germany; ROBERT J. LE ROY, Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
The entire emission spectrum of gas phase As2 below 32,000 cm-1 excited by microwave or high voltage discharges has been measured using a high resolution Fourier-transform spectrometer (Bruker IFS 120HR) with very sensitive Ge or InSb detectors. Its analysis yielded data on fourteen electronic band systems among the twelve electronic states: X 0g+(1
), A' 0u-(1
u-), D 1g(1
g), a 0u+(3
u-), a 1u(3
u-), c 1u(3
u+), c 0u-(3
u+), e 1u(3
u), e 2u(3
u), f 0g+(3
g), f 0g-(3
g) and f 1g(3
g). Rather than analyze these band systems in a series of independent two-state analyses, we have performed a comprehensive combined analysis of all data sets simultaneously, using program DSParFit.~ Differences between the present results and those obtained from independent two-state analyses, will be discussed.