The B2Π–X2Π electronic origin band of 13C6H

Abstract The rotationally resolved spectrum of the B 2 Π–X 2 Π electronic origin band transition of 13 C 6 H is presented. The spectrum is recorded using cavity ring-down spectroscopy in combination with supersonic plasma jets by discharging a 13 C 2 H 2 /He/Ar gas mixture. A detailed analysis of more than a hundred fully-resolved transitions allows for an accurate determination of the spectroscopic parameters for both the ground and electronically excited state of 13 C 6 H.