Knowledge Bank

On the $H3+$ potential $surfacea$ the saddle point for linear configurations lies about $9930cm-1$ above the lowest vibrational level. For calculations of vibration-rotation energy levels near or above this energy, it is important that the wavefunctions should have the correct behavior at linear geometries. The present work describes calculations using hyperspherical $harmonicsb$ as the angular basis. Previous similar calculations of lower energy levels of $H3+$ have been described by Wolniewicz and $Hinzec$. Here the line intensities as well as wavenumbers for the $5\nu 2$ band will be discussed.