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Spectroscopic analysis of M- and N-intrashell transitions in Co-like to Na-like Yb ions



Yuri Ralchenko, Dipti Goyal, Roshani Silwal, Endre Takacs, Joan Dreiling, Samuel Sanders, Amy Gall, Hemalatha Rudramadevi, John Gillaspy


The M-intrashell spectra from Co-like Yb$^43+}$ through Na-like Yb$^59+}$ ions produced in an electron beam ion trap (EBIT) at the National Institute of Standards and Technology have been studied in the extreme ultraviolet (EUV) range. A few N-intrashell transitions for Co-like Yb$^43+}$ and Fe-like Yb Yb$^44+}$ are also reported. The EUV radiation was observed with a flat-field grazing incidence spectrometer in the wavelength region of about 7.5nm to 26.2nm. The electron beam energies were varied between 3.6keV and 18keV to produce the ionization stages of interest. The line identifications were based on the large-scale simulations of the EBIT plasma emission using the non-Maxwellian collisional-radiative code NOMAD. A total of 75 previously unobserved spectral lines corresponding to electric-dipole and magnetic-dipole transitions in the above mentioned ions were identified and discussed.
Journal of Physics B-Atomic Molecular and Optical Physics


EUV spectroscopy, ytterbium, electron beam ion trap, collisional-radiative modelling, magnetic-dipole lines


Ralchenko, Y. , Goyal, D. , Silwal, R. , Takacs, E. , Dreiling, J. , Sanders, S. , Gall, A. , Rudramadevi, H. and Gillaspy, J. (2021), Spectroscopic analysis of M- and N-intrashell transitions in Co-like to Na-like Yb ions, Journal of Physics B-Atomic Molecular and Optical Physics, [online],, (Accessed May 17, 2024)


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Created December 19, 2021, Updated November 29, 2022