## Equilibrium binding energies (eV), equilibrium positions (Å) and quantum defects for Rydberg states of m ^1Delta and m ^1Phi symmetry

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**Table 4.** Equilibrium binding energies (eV), equilibrium positions (Å) and quantum defects for Rydberg states of \rm ^1\Delta and \rm ^1\Phi symmetry.

**Abstract**

Potential energy curves for electronically excited states of molecular nitrogen are calculated using three different *ab initio* procedures. The most comprehensive of these involves the use of scattering calculations, performed at negative energy using the UK molecular *R*-matrix method. Such calculations are used to characterize all the Rydberg states of N_{2} with *n* ≤ 6 and ℓ ≤ 4 as well as many higher states including some Rydberg states associated with the first excited A ^{2}Π_{u} state of N_2^+. Many of these states are previously unknown. The calculations are performed at a dense grid of internuclear separations allowing the many avoided crossings present in the system to be mapped out in detail. Extensive comparisons are made with the previously available data for excited states of N_{2}.