Absolute K-shell photoionization for gas-phase atomic nitrogen

So far, because of the difficulty of creating a target of neutral atomic nitrogen, there have been no reports on the details of high-resolution K-edge spectra. Recently, scientists at Lawrence Berkeley National Laboratory have performed both experimental and theoretical studies on the strong 1s→np resonance features throughout the threshold region. The absolute value of the K-shell binding energy was experimentally obtained for the first time, and it was 409.64±0.02 eV. For more information, see the paper, "K-Shell X-Ray Spectroscopy of Atomic Nitrogen", M. M. Sant'Anna et al., Phys. Rev. Lett. 107, 033001 (2011).