Vibrational Bound States of the He₂Ne⁺ Cation^†

Click to copy article linkArticle link copied!

The vibrational bound states of the He₂Ne⁺ complex have been determined using a potential energy surface previously published by Seong et al. [J. Chem. Phys. 2004, 120, 7456]. The calculation was performed by sequential diagonalization−truncation techniques in a discrete variable representation using Radau hyperspherical coordinates. There are 52 bound levels. The ground state has an energy of 605.3 cm⁻¹ above the absolute minimum and lies about half way to dissociation. The evaporation energy of one He atom is equal to 866.1 cm⁻¹. Only four levels have energies below the classical energy for dissociation, and all the other 48 states are bound by the zero-point energy of the HeNe⁺ fragment. The implications of the properties of the eigenvalue spectrum and of the corresponding wave functions on the vibrational relaxation dynamics and infrared spectra of He_NNe⁺ clusters is discussed.