{\it K}-Shell Photoionization of Be-like and Li-like Ions of Atomic Nitrogen: Experiment and Theory

M M Al Shorman; M F Gharaibeh; J M Bizau; D Cubaynes; S Guilbaud; N El Hassan; C Miron; C Nicolas; E Robert; I Sakho; C Blancard; B M McLaughlin

arXiv · 1308.6795

{\it K}-Shell Photoionization of Be-like and Li-like Ions of Atomic Nitrogen: Experiment and Theory

M M Al Shorman·M F Gharaibeh·J M Bizau·D Cubaynes·S Guilbaud·N El Hassan·C Miron·C Nicolas·E Robert·I Sakho·C Blancard·B M McLaughlin

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Abstract

Absolute cross sections for the {\it K}-shell photoionization of Be-like and Li-like atomic nitrogen ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron radiation facility in Saint-Aubin, France. High-resolution spectroscopy at nominal resolutions of 38 meV, 56 meV, 111 meV, 133 meV FWHM for Be-like and 125 meV FWHM for Li-like atomic nitrogen ions was achieved for the photon energies ranging from 410 eV up to 460 eV. The experimental measurements are compared with theoretical estimates from the multi-configuration Dirac-Fock (MCDF), R-matrix and an empirical method. The interplay between experiment and theory enabled the identification and characterisation of the strong 1s $\rightarrow$ 2p resonances features observed in the {\it K}-shell spectra of each ion and the region around 460 eV for the 1s $\rightarrow$ 3p resonance of the N$^{3+}$ ion yielding suitable agreement with experiment.

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M M Al Shorman, M F Gharaibeh, J M Bizau, D Cubaynes, S Guilbaud, N El Hassan, C Miron, C Nicolas, E Robert, I Sakho, C Blancard, B M McLaughlin. 2013-09-09. {\it K}-Shell Photoionization of Be-like and Li-like Ions of Atomic Nitrogen: Experiment and Theory. https://arxiv.org/abs/1308.6795

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