LEAST SQUARES FITTING OF PERTURBED VIBRATIONAL POLYADS NEAR THE ISOMERIZATION BARRIER IN THE S$_1$ STATE OF C$_2$H$_2$

Author Institution: Department of Chemistry, University of British Columbia, Vancouver, B.C., Canada V6T 1Z1; AND Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA