Inherent lifetime widths of Ar 2p^-1, Kr 3d^-1, Xe 3d^-1, and Xe 4d^-1 states

The natural widths of the Ar 2⁢𝑝⁻¹, Kr 3⁢𝑑⁻¹, Xe 3⁢𝑑⁻¹, and Xe 4⁢𝑑⁻¹ states have been determined from photoelectron spectra measured with very high resolution. Lifetime widths 𝛤_𝐿 of 104±3⁢meV and 111±3⁢meV were obtained for the Xe 4⁢^𝑑−1 _3/2 and 4⁢^𝑑−1 _5/2 states, respectively. In contrast, no differences in the inherent lifetime width could be found for the spin-orbit split components of Ar 2⁢𝑝 (𝛤_𝐿 =118 ±4⁢meV) and Kr 3⁢𝑑 (𝛤_𝐿 =88 ±4⁢meV) ionized states. The lifetime widths of the Xe 3⁢𝑑⁻¹ _3/2 and 3⁢𝑑⁻¹ _5/2 states were found to be 490 ±30⁢meV and 510 ±30⁢meV, respectively. The extracted lifetime widths are compared with the previously published experimental results.