The nd1Δg (n=11-15) Rydberg States of K2 Studied by Optical-Optical Double Resonance Spectroscopy and Space Charge Limited Diode Ionization Detector

Five bound nd 1 Δ g ( n = 11-15) electronic states have been investigated using optical-optical double resonance excitation followed by ionization detection using an ultrasensitive space charge limited diode, which detects ion signals (presumably K + 3 produced by associative ionization). The molecular constants and the Rydberg-Klein-Rees potential curves for these states have been generated. The dissociation energies, additional binding energies, and molecular constants due to the weakly bound Rydberg bonding δ g orbitals are discussed.