Ein neues c′¹Π_g — b¹II_u-Bandensystem des C₂-Moleküls

Abstract

Homogeneous rotational perturbations (Δ Λ = 0) were found in the DESLANDRES-D’AZAMBUJA bands (c 1 Π g — b 1 Π u ) for v′ ≧ 3. The rotational analysis showed that the c 1 Π g state is perturbed by an hitherto unknown c′ 1 Π g state. Vibrational levels of the c′ 1 Π g state were determined from ν = 0 up to ν = 5. Furthermore some additional vibrational levels of the c 1 Π g state could be identified up to ν = 8. The detection of the c′ 1 Π g state explains the observed strong vibrational perturbation of the c 1 Π g state. The mutual position of the two 1 Π g potential curves is plotted approximately.