OSCILLATOR STRENGTH MEASUREMENT FOR THEA(0–6)–X(0),C(0)–X(0), ANDE(0)–X(0) TRANSITIONS OF CO BY THE DIPOLE (γ,γ) METHOD

Abstract

The oscillator strengths of CO, especially for the excitations to the predissociating levels C-1 Sigma(+) and E-1 Pi, have significant applications in the studies of interstellar gases. A large number of investigations, applying a variety of experimental and calculational methods, have focused on the determination of these oscillator strengths. However, deviations of more than 10% have been observed, even for the same experimental method. In this case, we introduce a new technique, the dipole (gamma,gamma), to measure the oscillator strengths. The obtained oscillator strengths of the strong bands C-1 Sigma(+)(v' = 0)-X-1 Sigma(+) and E1 Pi( v' = 0)-X-1 Sigma(+) in this work reach high accuracy and are in excellent agreement with some previous results, although they are different from the recommended values in other works. In addition, we measured the oscillator strengths of the A(1)Pi(v' = 0-6)-X-1 Sigma(+) bands, and the electronic transition moment dependence on r-centroid was derived.