Knowledge Bank

While the entire discrete $He2$ spectrum between $2800-11,500\backslash AA$ is being reinvestigated, the emphasis of this paper will be on the states which are the first stable members of the eight principle Rydberg series: $2s\sigma 1,3\Sigma u+;2p\pi 1,2\Pi g;3p\sigma 1,2\Sigma g+;3d\sigma ,\pi ,\delta 1,3\Sigma u+,1,3\Pi u,1,3\Delta u$ The general lack of vibrational data and the almost complete absence of transitions involving $np\sigma$ MO's have been remedied, as can be seen from the following partial listing of molecular constants. $\omega ex\omega ey\omega es\omega eBens\sigma A1\Sigma g+1860.5734.64-0.1787.779enp\sigma C1\Sigma g+\backslash dag1653.4541.140.415-0.14o7.0695np\sigma C2\Sigma g+1595.7163.995.25-.9677.000$ The effects of l-uncoupling on the 3d complex, as well as certain aspects of the dissociations of the various states, will also be discussed.