Experimental determination of the band oscillator strengths fill of the CO A(1) Pi (11<=v'<=23)-X(1}Sigma ({+)) (v''=0) made fill at the LURE-SuperACO synchrotron facility.

Abstract

The band-integrated absorption oscillator strengths of the CO A 1 (11v'23)-X 1+ (v=0) transition have been measured using monochromatized synchrotron radiation from the LURE-SuperACO facility as background source. The ab- sorption spectra were analyzed using the simulation-fitting tech- nique described in an earlier publication (Jolly et al. 1997). Up to v'=20, the results are in good agreement with very recent ab initio calculations (Spielfiedel et al. 1999) and VUV laser measurements( Stark et al. 1998). For v'=23 which is measured here for the first time, and for v'=21 the measured oscillator strengths are found to be significantly larger than the calculated ones. Combining experimental and calculated results, a set of recommended oscillator strengths is proposed.