2l-nl' X-ray transitions from neonlike charge states of the row 5 metals with 39≤Z≤46

X-ray spectra of 2l-nl' transitions with 3≤n≤12 in the row five transition metals zirconium (Z=40), niobium (Z=41), molybdenum (Z=42) and palladium (Z=46) from charge states around neonlike have been observed from Alcator C-Mod plasmas. Accurate wavelengths (±.2 mA) have been determined by comparison with neighboring argon, chlorine and sulphur lines with well known wavelengths. Line identifications have been made by comparison to ab initio atomic structure calculations, using a fully relativistic, parametric potential code. For neonlike ions, calculated wavelengths and oscillator strengths are tabulated for 2p-nd transitions in Y (Z=39), Tc (Z=43), Ru (Z=44) and Rh (Z=45) with n=6 and 7. The magnitude of the configuration interaction between the (2p5)1/26d3/2J=1 level and the (2p5)3/27d5/2J=1 levels is demonstrated as a function of atomic number for successive neonlike ions. Measured spectra of selected transitions in the aluminum-, magnesium-, sodium- and fluorinelike isosequences are also shown. copyright 1996 American Institute of Physics