Hyperfine structure of the transitions of 16O17O, 17O18O and 17O2 by CRDS at 80K

Abstract

a b s t r a c tThe high sensitivity absorption spectrum of the a 1 D g À X 3 + À g band of 16 O 17 O, 17 O 18 O and 17 O 2 has been recorded by CW-Cavity Ring Down Spectroscopy near 1.27 lm. The spectra were obtained between7640 and 7917 cm À1 with a 17 O-enriched sample at room temperature and at 80 K. Due to the I = 5/2 nuclear spin of the 17 O atom, the nuclear hyperfine structure of the transitions could be partly resolved at low temperature. The parameter coupling of the nuclear spin to the electronic angular momentum in the a 1 D g state has been derived for the three studied isotopologues of oxygen.