M. M. Sant’Anna (1), A. S. Schlachter (1) G. Öhrwall (2), W. C. Stolte (2), D. W. Lindle (2) & B. M. McLaughlinz (3) ((1) Lawrence Berkeley National Laboratory, University of California, Berkeley, California, USA; (2) Department of Chemistry, University of Nevada, Las Vegas, Nevada, USA; (3) Harvard Smithsonian Center for Astrophysics, Cambridge, Massachusetts, USA)
Absolute K-shell photoionization cross sections for atomic nitrogen have been obtained from both experiment and state-of-the-art theoretical techniques. Due to the difficulty of creating a target of neutral atomic nitrogen, no high-resolution K-edge spectroscopy measurements have been reported for this important atom. Interplay between theory and experiment enabled identification and characterization of the strong 1s → np resonance features throughout the threshold region. An experimental value of 409.64 ± 0.02 eV was determined for the K-shell binding energy.
Complete preprint ==> http://arxiv.org/pdf/1203.4250v1.pdf