TPEsCO spectra of HCl2+ and DCl2+: experiment and theory

Vibrationally resolved threshold photoelectrons in coincidence (TPEsCO) spe ctra of the X(3)Sigma (-) and a(1)Delta states of HCl2+ and DCl2+ are compa red with ab initio simulations. The four resonances observed in the TPEsCO spectra of both the X(3)Sigma (-) and a(1)Delta states of HCl2+ are assigne d as three quasi-bound vibrational levels and one continuum resonance with an energy greater than the potential barrier maximum. The four clearly iden tified resonances observed in Cl2+ the TPEsCO spectra of both the X(3)Sigma (-) and a(1)Delta states of DCl2+ are assigned as quasi-bound vibrational levels. (C) 2001 Elsevier Science B.V. All rights reserved.