COLLISIONAL APPROACH TO THE SPECTROSCOPY OF HIGHLY VIBRATIONALLY EXCITED HCN

A new approach based on collisional energy transfer is implemented, to probe the spectroscopy of HCN at high vibrational excitation. The results show that the approach can uncover vibrational levels of HCN undetected by SEP or overtone absorption, the two major spectroscopic techniques at high excitation. it can also probe previously inaccessible levels in the first excited electronic state. The newly observed A state levels are displaced up to 40 cm-1 from predictions based on literature values of the pertinent rotational constants.