Abstract

The high‐resolution absolute photoabsorption cross section with an absolute photon energy scale for Ne in the energy region of 864–872 eV (1s−1np Rydberg states) has been measured using a multi‐electrode ionization chamber and monochromatized synchrotron radiation. The natural lifetime width of Ne 1s−13p resonance state has been obtained to be 252 ± 5 meV. The Ne+ (1s−1) ionization potential is determined to be 870.16 ± 0.04 eV by using the Rydberg formula. These absolute values are supposed to be more reliable than those previously reported.

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