Selenium

Table 1. Se 3d5/2 literature value averages [1].

Se 3d5/2-3d3/2 separation = 0.86 eV [2]

References:
[1] http:/srdata.nist.gov/xps/
[2] J.F. Moulder, W.F. Stickle, P.E. Sobol, K.D. Bomben "Handbook of X-Ray Photoelectron Spectroscopy", Perkin-Elmer Corporation, Physical Electronics Division, Eden Prairie, Minn. (1992)