Description
Title: Effects of Configuration Interaction in Unresolved Transition Arrays in Ions Z = 79-92: 5p65dN+15p55dN+2+5p65dN5f1
Abstract: Extreme ultraviolet (EUV) and soft X-ray (SXR) spectra of heavier ions are dominated by emission from unresolved transition arrays (UTAs), the most intense of which originate from Dn = 0, 4p64dN+14p54dN+2+4p64dN4f1 transitions. Configuration interaction (CI) effects can have a significant impact on this process. The origin of the UTA shifts from Dn = 0, 4p64dN+1, 4p54dN+2, and 4p64dN4f1 transitions to Dn = 0, 5p65dN+1, 5p55dN+2, and 5p65dN5f1 transitions when the principle quantum number n is changed from 4 to 5. As a result, the impact of configuration interaction differs significantly and unexpectedly from what was seen in the extensively researched n = 4n = 4 arrays. In this study, Hartree-Fock with configuration interaction (HFCI) calculations have been used to theoretically investigate the properties of n = 5n = 5 arrays. The calculations demonstrate that the effects of configuration interaction are quite different for the two different families of Dn = 0 transitions, in addition to forecasting the wavelengths and spectral details of the anticipated features. This conclusion is supported by a comparison with experimental findings.
Keywords: configuration interaction (CI); unresolved transition array (UTA); Cowan code
Paper Quality: SCOPUS / Web of Science Level Research Paper
Subject: Physics
Subject Category: Atomic and Molecular Physics, and Optics
Writer Experience: 20+ Years
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