Auger decay and natural lifetime widths of single and double K-shell vacancy states of Al4+–Al11+ ions

The Auger decay of single and double K-shell hole and hollow states of Al4+–Al11+ was theoretically investigated in the framework of perturbation theory implemented by the distorted wave approximation. The natural lifetime widths of the hollow states x + are found to be 1.3–1.9 times larger than those of corresponding hole states x + . The maximal ratio is found originating from the hollow states of , which is ~2.9 times as large as the hole states of . The calculated energy levels and natural lifetime widths are compared with the experimental and other theoretical results wherever available in the literature. The Auger decay rates and natural lifetime widths presented in this work are useful in the modeling of ultra-intensive x-ray laser interaction with aluminum.