Fourier transform spectroscopy of chemiluminescence from the A′1Π–X1Σ+ system of SrO

✍ Scribed by Randall H. Skelton; Hongzhi Li; Chris D. Boone; Robert J. Le Roy; Peter F. Bernath; Cristian Focsa; Bernard Pinchemel

• Book ID: 104151759
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 281 KB
• Volume: 219
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1016/s0022-2852(03)00006-7

✦ Synopsis

The A 01 P-X 1 R þ near infrared system of strontium oxide (SrO) was observed at high spectral resolution by measuring the chemiluminescence from a Broida flow reactor using a Fourier transform spectrometer. In total, 32 bands from 88 SrO, 87 SrO, 86 SrO were measured within the 4000-10 000 cm À1 spectral region at a resolution of 0:03 cm À1 . Vibrational levels of the upper state were observed up to v A 0 ¼ 4, and more than 5600 rotational lines were assigned. Incorporating previously published high resolution data for the A 1 R þ -X 1 R þ system, a global fit to both data sets yields improved Dunham constants for the ground state and for the lower vibrational levels (v A 0 ¼ 0, 1, and 2) of the A 01 P state. Because perturbations arising from interactions with the b 3 R þ and A 1 R þ states affect the higher vibrational levels of the A 01 P state more strongly, levels v A 0 ¼ 3 and 4 were represented by effective band constants in the fits. RKR potentials for the X 1 R þ ; A 01 P, and b 3 R þ states have been generated utilizing all the available data, Franck-Condon factors have been calculated for the A 01 P-X 1 R þ system, and A 01 P $ b 3 R þ and A 01 P $ A 1 R þ perturbations are discussed.