New Window Resonances in the Potassium 3s Photoabsorption Spectrum

Details New Window Resonances in the Potassium 3s Photoabsorption Spectrum New Window Resonances in the Potassium 3s Photoabsorption Spectrum

2002-05-30

arxiv.org/abs/physics/0205088v1

Physics

Atomic Physics

7 pages, 1 figure

Scientific paper

10.1143/JPSJ.71.1676

The photoion spectrum of atomic potassium was measured over the 3s -> np excitation region with the photoion time-of-flight method and monochromatized synchrotron radiation. An unusual spectrum with paired windows structure was found instead of a simple regular Rydberg series. Such subsidiary windows have not been observed in the 3s -> np resonances of Ar, which has a closed outer shell. Based on Dirac-Fock calculations, the dual window structure at 36.7 eV and at 37.4 eV was assigned to the 3s^{-1}3p^{6}4s4p resonance. The line shape can be fitted by Fano's formula and the Fano parameters were obtained.

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