@article {Guerra:2021dd,
	title = {{Fundamental Parameters Related to Selenium K$\alpha$ and K$\beta$ Emission X-ray Spectra}},
	journal = {Atoms},
	volume = {9},
	number = {1},
	year = {2021},
	note = {n/a},
	pages = {8{\textendash}10},
	publisher = {Multidisciplinary Digital Publishing Institute},
	abstract = {<p>We present relativistic ab initio calculations of fundamental parameters for atomic selenium, based on the Multiconfiguration Dirac-Fock method. In detail, fluorescence yields and subshell linewidths, both of K shell, as well as K$\beta$ to K$\alpha$ intensity ratio are provided, showing overall agreement with previous theoretical calculations and experimental values. Relative intensities were evaluated assuming the same ionization cross-section for the K-shell hole states, leading to a statistical distribution of these initial states. A method for estimating theoretical linewidths of X-ray lines, where the lines are composed by a multiplet of fine-structure levels that are spread in energy, is proposed. This method provides results that are closer to K$\alpha$1,2 experimental width values than the usual method, although slightly higher discrepancies occur for the K$\beta$1,3 lines. This indicates some inaccuracies in the calculation of Auger rates that have a higher contribution for partial linewidths of the subshells involved in the K$\beta$1,3 profile. Apart from this, the calculated value of K$\beta$ to K$\alpha$ intensity ratio, which is less sensitive to Auger rates issues, is in excellent agreement with recommended values.</p>
},
	doi = {10.3390/atoms9010008},
	url = {https://www.mdpi.com/2218-2004/9/1/8},
	author = {{Guerra, Mauro and Sampaio, Jorge and V{\'{\i}lia, Gon{\c c}alo and C{\'e}sar Godinho and Daniel Pinheiro and Amaro, Pedro and Jos{\'e} Marques and Machado, Jorge and Indelicato, Paul and Parente, Fernando and Santos, Jos{\'e}}
}
