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Absorption spectra of Cl2, Br2 and BrCl between 190 and 600 nm

1995; Elsevier BV; Volume: 86; Issue: 1-3 Linguagem: Inglês

10.1016/1010-6030(94)03949-u

1873-2666

Silviane Zanni Hubinger, J. B. Nee,

Spectroscopy and Laser Applications

Absolute photoabsorption cross sections at room temperature are reported for Cl2 (190–500 nm), Br2 (190–600 nm), and BrCl (190–560 nm). In addition, cross sectional data for BrCl were deconvoluted using a semi-logarithmic gaussian distribution function into a UV band centered at 228.3 nm, a C1Π1 band centered at 376.4 nm, a B3Π0+ band centered at 454.9 nm, and an A3Π1 band centered at 533.1 nm. The BrCl band maximum at approximately 228 nm of 6.0×10−20 cm2 molecule−1 was assigned to a transition from the X1Σ0+ ground state to a repulsive 0+ electronic state by analogy with similar UV bands present in ICl and IBr. Finally, an absorbance maximum was also detected for Br2 at 227 nm of 0.96×10−20 cm2 molecule−1.