Classification of resonance transitions in Ge XIX, Se XXI, Sr XXV, Y XXVI and Zr XXVII

Abstract

Transitions to the 3s23p2 ground configuration from 3s3p3 and 3s23p3d were identified in Ge XIX, Se XXI, Sr XXV, Y XXVI and Zr XXVII in the extreme-ultraviolet spectra emitted from linear plasmas that were produced using line-focused laser beams. A grazing-incidence spectrograph viewed the plasma in the axial direction. Energy values, determined from the observed combinations were compared with values obtained from multi-configuration Dirac-Fock calculations. Fitted energy levels of 3s23p2, 3s3p3 and 3s23p3d are also presented for elements between arsenic and molybdenum.