Continuum and discrete pulsed cavity ring down laser absorption spectra of Br2 vapor
Journal
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Journal Volume
61
Journal Issue
9
Pages
2115-2120
Date Issued
2005
Author(s)
Sharma, R.C.
Huang, H.-Y.
Chuang, W.-T.
KING-CHUEN LIN
Abstract
The absorption cross-sections at room temperature are reported for the first time, of Br2 vapor in overlapping bound-free and bound-bound transition of A3Π1u ← XΣg +, X1Π1u ← X1Σ g+ and B3Π0u ← X 1Σg+, using cavity ring down spectroscopy (CRDS) technique. We reported here, the A3Π1u ← X1Σg+, transition is included along with the two stronger X1Π1u ← X1Σ g+ and B3Π0u ← X 1Σg transitions of Br2. We obtained discrete absorption cross-section in the rotational structure, the continuum absorption cross-sections, and were also able to measure the absorption cross-section in separate contribution of A3Π1u ← X1Σg+, 1Π1u ← X1Σg+, and B3Π 0u ← X1Σg+ transitions using CRDS method to use quantum yield of Br*( 2P1/2). We obtained absorption cross-section order 10 -19 cm2 and detection 1013 molecule cm -3 (1 mTorr) of Br2. The absorption cross-sections are increasing with increasing excitation energy in the wavelength region 510-535 nm. © 2004 Elsevier B.V. All rights reserved.
SDGs
Type
journal article