High resolution laser spectroscopy of NO: The A, v=1 state and a series of n f, v=1 Rydberg states

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Abstract
A high resolution pulse‐amplified cw laser with a bandwidth of 0.002 cm−1 has been used to measure transition energies from the ground state to the A 2Σ+(3sσ), v=1 state to an accuracy of about 0.01 cm−1. Transitions to the 7f, 12f, and 15f, v=1 states from the A state have been measured to an accuracy better than 0.02 cm−1 using optical double resonance. The long‐range interaction model accurately describes the nf term energies. Improved values for the ionization potential of NO and for the isotropic polarizability and rotational constant of the NO+ ion core have been obtained from the analysis of these states. The lifetimes of the 7f, 12f, and 15f, v=1 states have been determined by measuring their natural linewidths.