Study of relativistic excitation energies and transition data for EUV and SXR spectral lines in Ge XXIX and Kr XXXIII of fusion interest

Based on relativistic wavefunctions from multi-configurational Dirac-Fock method, a comprehensive theoretical study of atomic characteristics of energy levels, wavelengths, lifetimes, electric dipole, electric quadrupole, magnetic dipole, and magnetic quadrupole radiative rates is performed for the lowest 98 levels of the 2s(2), 2p(2), 2s3s, 2s3d, 2p3p, 2s4s, 2s4d, 2p4p, 2p4f, 2s2p, 2s3p, 2p3s, 2p3d, 2s4p, 2s4f, 2p4s, and 2p4d configurations of Ge XXIX and Kr XXXIII. The correlations within the n=9 complex, n being the principal quantum number of the outermost electron are accounted for in a systematic way and the Breit interactions and quantum electrodynamics effects are estimated. Similar data are also determined using the many-body perturbation theory. The accuracy of our results is determined through extensive comparisons with the available data from the Atomic Spectra Database of the National Institute of Standards and Technology and with published theoretical values. Our computed wavelengths are almost of spectroscopic accuracy, aiding line identification in extreme ultraviolet (EUV) and soft X-ray (SXR) spectra. The present complete set of data are very useful for modeling and diagnosing fusion plasmas. (C) 2019 Elsevier Ltd. All rights reserved.