Research Papers in Physics and Astronomy


Date of this Version



PHYSICAL REVIEW A 86, 041401(R) (2012); DOI: 10.1103/PhysRevA.86.041401


Copyright 2012 American Physical Society. Used by permission.


We have measured the total fluorescent intensity and circular polarization of light emitted in 3p 4Po → 3s4P transitions of excited neutral nitrogen atoms created by the photofragmentation of the N2 molecule with circularly polarized light having energies between 21 and 26 eV. The intensity measurements show the effect of predissociation of the N2 Rydberg series R(C) 1Σ+u states by non-Rydberg doubly excited resonances (NRDERs), while nonzero values of circular polarization allow us to unambiguously identify the presence of a directly excited NRDER with 1Πu symmetry in this energy range.

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