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Er IV U[cm-1]0344000 26376 24475 19010 22453 22181 20494 18299 15182 12345 10123 6485 0 46808 42044 39067 38526 33783 33178 27305 68765 62909 93134 55055 96726 50061 46667 42802 54910 42797 40508 40164 36268 46989 34641 48873 33336 32392 31477 27877 64688 27176 68800 137600 206400 275200 4f11 2G11/2 4f11, j=11/2 2G9/2 4f11, j=9/2 2H11/2 4f11, j=11/2 4f11 4Fo3/2 4f11, j=3/2 4Fo5/2 4f11, j=5/2 4Fo7/2 4f11, j=7/2 4So3/2 4f11, j=3/2 4Fo9/2 4f11, j=9/2 4Io9/2 4f11, j=9/2 4Io11/2 4f11, j=11/2 4Io13/2 4f11, j=13/2 4Io15/2 4f11, j=15/2 4f10n 4D1/2 4f10nl, j=1/2 4D3/2 4f10nl, j=3/2 4D7/2 4f10nl, j=7/2 4D5/2 4f10nl, j=5/2 4G7/2 4f10nl, j=7/2 4G5/2 4f10nl, j=5/2 4G9/2 4f10nl, j=9/2 2G9/2 4f10nl, j=9/2 2F5/2 4f10nl, j=5/2 4f10nl, j=5/2 2F7/2 4f10nl, j=7/2 4f10nl, j=7/2 2H11/2 4f10nl, j=11/2 2L15/2 4f10nl, j=15/2 2D3/2 4f10nl, j=3/2 4f10nl, j=3/2 2I13/2 4f10nl, j=13/2 2L17/2 4f10nl, j=17/2 2I11/2 4f10nl, j=11/2 2H9/2 4f10nl, j=9/2 4f10nl, j=9/2 2D5/2 4f10nl, j=5/2 4f10nl, j=5/2 2P1/2 4f10nl, j=1/2 2K13/2 4f10nl, j=13/2 2P3/2 4f10nl, j=3/2 2G7/2 4f10nl, j=7/2 4f10nl, j=7/2 2K15/2 4f10nl, j=15/2 1857.66 15800 2440 3660 3070 5290 5830 5934.26 6860 6680 15330 3840 2952.02 1413.64 2227.84 1310.09 1496.03 1175.28 3092.11 1803.91 Er IV U[eV]042.6 8.5 17.1 25.6 34.1