Iron Energy Ion Level 1 Level 2 (ev) 8920.0 FE XXVI 1 6 8860.0 FE XXVI 1 5 8610.0 FE XXVI 1 4 8210.0 FE XXV 1S2 1S 1S4P 1PO 8160.0 FE XXVI 1 3 7800.0 FE XXV 1S2 1S 1S3P 1PO 6970.0 FE XXIII 1S22S2 1S(0) 1S2S22PX 6930.0 FE XXII 1S22S22P 2P(1/2)O 1S2S22P2X 6890.0 FE XXI 1S22S22P2 3P(0) 1S2P22P3X 6890.0 FE XXVI 1 2 6850.0 FE XX 1S22S22P3 4S(3/2)O 1S2S22S4X 6810.0 FE XIX 1S22S22P4 3P(0) 1S2S22P5X 6780.0 FE XVIII 1S22S22P5 2P(1/2)O 1S2S22P6X 6740.0 FE III 1S22S22P63S23P63D6 1S2S22P63S23P63D64PX 6740.0 FE IV 1S22S22P63S23P63D5 1S2S22P63S23P63D6X 6740.0 FE IX 1S22S22P63S23P6 1S22S22P53S23P63DX 6740.0 FE V 1S22S22P63S23P63D4 1S2S22P63S23P63D5X 6740.0 FE VI 1S22S22P63S23P63D3 1S2S22P63S23P63D4X 6740.0 FE VII 1S22S22P63S23P63D2 1S22S22P63S23P53D3X 6740.0 FE VIII 1S22S22P63S23P63D 1S2S22P63S23P63D2X 6740.0 FE X 1S22S22P63S23P5 1S2S22P63S23P6X 6740.0 FE XI 1S22S22P63S23P4 1S2S22P63S23P5X 6740.0 FE XII 1S22S22P63S23P3 4S(3/2)O 1S2S22P63S23P4X 6740.0 FE XIII 1S22S22P63S23P2 3P(0) 1S2S22P63S23P3X 6740.0 FE XV 1S22S22P63S2 1S(0) 1S22S2P63S23PX 6740.0 FE XVI 1S22S22P63S 3S(1/2) 1S2S22P63S2X 6740.0 FE XVII 1S22S22P6 1S22S22P53SX 6700.0 FE XXV 1S2 1S 1S2P 1PO 6670.0 FE XXIV 1S22S 2S(1/2) 1S2S2 6670.0 FE XXV 1S2 1S 1S2P 3PO 6630.0 FE XXIII 1S22S2 1S(0) 1S2S22P 6630.0 FE XXV 1S2 1S 1S2S 3S 6590.0 FE XXII 1S22S22P 2P(1/2)O 1S2S22P2 6560.0 FE XXI 1S22S22P2 3P(0) 1S22S22PNL 6490.0 FE XX 1S22S22P3 4S(3/2)O 1S22S22P2NL 6420.0 FE XVIII 1S22S2P6 1S22S2P5NL 2040.0 FE XXVI 2 6 1930.0 FE XXVI 2 5 1720.0 FE XXVI 2 4 1720.0 FE XXIV 1S22S 2S(1/2) 1S25P 1540.0 FE XXIV 1S22S 2S(1/2) 1S24P 1500.0 FE XXIV 1S22P 2P(1/2) 1S24D 1480.0 FE XXIV 1S22P 2P(1/2) 1S24S 1470.0 FE XXIII 1S22S2 1S(0) 1S22S4P 1420.0 FE XXIII 1S22S2P 1PO 1S22S4L 1380.0 FE XXII 1S22S22P 2P(1/2)O 1S24D 1310.0 FE XIX 1S22S22P4 3P(0) 1S22S22P3NL 1280.0 FE XXVI 2 3 1270.0 FE XXI 1S22S22P2 3P(0) 1S22S22P4L 1200.0 FE XX 1S22S22P3 4S(3/2)O 1S22S22P24L 1200.0 FE XXV 1S2P 3PO 1S3D 3D 1180.0 FE XXV 1S2P 1PO 1S3D 1D 1160.0 FE XXIV 1S22S 2S(1/2) 1S23P 1150.0 FE XIX 1S22S22P4 3P(0) 1S22S22P34L 1150.0 FE XIX 1S22S22P4 3P(0) 1S22S2P43P 1130.0 FE XVII 1S22S22P6 1S22S2P64P 1130.0 FE XXIII 1S22S2 1S(0) 1S22S3P 1PO 1130.0 FE XXIV 1S22P 2P(1/2) 1S23D 1090.0 FE XVIII 1S22S2P6 1S22S2P54L 1090.0 FE XXIV 1S22P 2P(1/2) 1S23S 1080.0 FE XXIII 1S22S2P 1PO 1S22S3D 3D 1050.0 FE XXIII 1S22S2P 1PO 1S22S3D 1D 1040.0 FE XXII 1S22S22P 2P(1/2)O 1S23D 1030.0 FE XXI 1S22S2P3 3DO 1S22S2P23D 1010.0 FE XXII 1S22S22P 2P(1/2)O 1S23S 1010.0 FE XVII 1S22S22P6 1S22S22P54D 1010.0 FE XX 1S22S22P3 4S(3/2)O 1S22S2P33P 1010.0 FE XXII 1S22S2P2 1S22S2P3D 1000.0 FE XXI 1S22S22P2 3P(0) 1S22S22P3D 1000.0 FE XXIII 1S22S2P 1PO 1S22S3S 1S 991.0 FE XVII 1S22S22P6 1S22S22P54S 966.0 FE XX 1S22S22P3 4S(3/2)O 1S22S22P23D 4L 961.0 FE XXI 1S22S2P3 3DO 1S22S2P23S 958.0 FE XX 1S22S22P3 4S(3/2)O 1S22S22P23D 2L 946.0 FE XXII 1S22S2P2 1S22S2P3S 936.0 FE XXI 1S22S22P2 3P(0) 1S22S22P3S 925.0 FE XVIII 1S22S22P5 2P(1/2)O 1S22S2P53P 918.0 FE XIX 1S22S22P4 3P(0) 1S22S22P33D 3PO 912.0 FE XIX 1S22S22P4 3P(0) 1S22S22P33D 3DO 909.0 FE XV 1S22S22P63S2 1S(0) 1S22S22P53S23PX 904.0 FE XX 1S22S22P3 4S(3/2)O 1S22S22P23S 2L 898.0 FE XIX 1S22S2P5 1S22S2P43D 897.0 FE XIV 1S22S22P63S23P 2P(1/2)O 1S22S22P53S23P2X 897.0 FE XVII 1S22S22P6 1S22S2P63P 886.0 FE XIII 1S22S22P63S23P2 3P(0) 1S22S2P63S23P3X 880.0 FE XII 1S22S22P63S23P3 4S(3/2)O 1S22S2P63S23P4X 874.0 FE XX 1S22S22P3 4S(3/2)O 1S22S22P23S 4L 873.0 FE XI 1S22S22P63S23P4 1S22S2P63S23P5X 865.0 FE X 1S22S22P63S23P5 1S22S2P63S23P6X 863.0 FE XVIII 1S22S22P5 2P(1/2)O 1S22S22P43D 2F,2D 858.0 FE IX 1S22S22P63S23P6 1S22S22P63S3P63DX 852.0 FE XVIII 1S22S22P5 2P(1/2)O 1S22S22P43D 2S,2P 851.0 FE VIII 1S22S22P63S23P63D 1S22S22P63S23P53D2X 845.0 FE VII 1S22S22P63S23P63D2 1S22S22P63S3P63D3X 845.0 FE XVIII 1S22S22P5 2P(1/2)O 1S22S22P43D 4L 843.0 FE XX 1S22S2P4 1S22S2P33D 841.0 FE VI 1S22S22P63S23P63D3 1S22S22P63S23P53D4X 837.0 FE V 1S22S22P63S23P63D4 1S22S22P63S23P53D5X 835.0 FE IV 1S22S22P63S23P63D5 1S22S22P63S23P53D6X 827.0 FE XV 1S22S22P63S2 1S(0) 1S22S22P53S24D 827.0 FE XV 1S22S22P63S2 1S(0) 1S22S2P63S24D 826.0 FE XVII 1S22S22P6 1S22S22P53D 1PO 823.0 FE XIX 1S22S22P4 3P(0) 1S22S22P33S 3DO,3PO 819.0 FE XIX 1S22S22P4 3P(0) 1S22S22P33S 3SO 816.0 FE XIX 1S22S2P5 2S22S2P43S 812.0 FE XVII 1S22S22P6 1S22S22P53D 1DO,1FO 805.0 FE XVI 1S22S22P63P 1S22S22P53S3P 805.0 FE XVIII 1S22S2P6 1S22S2P53D 802.0 FE III 1S22S22P63S23P63D6 1S22S22P63S23P53D64PX 802.0 FE XVII 1S22S22P6 1S22S22P53D 3PO 785.0 FE IX 1S22S22P63S23P6 1S22S2P63S23P63DX 781.0 FE XVIII 1S22S22P5 2P(1/2)O 1S22S22P33S 778.0 FE VIII 1S22S22P63S23P63D 1S22S22P63S3P63D2X 772.0 FE VII 1S22S22P63S23P63D2 1S22S22P53S23P63D3X 769.0 FE VI 1S22S22P63S23P63D3 1S22S22P63S3P63D4X 766.0 FE IV 1S22S22P63S23P63D5 1S22S22P63S3P63D6X 765.0 FE V 1S22S22P63S23P63D4 1S22S22P63S3P63D5X 765.0 FE XVIII 1S22S2P6 1S22S2P53S 764.0 FE XXVI 3 6 753.0 FE III 1S22S22P63S23P63D6 1S22S22P63S3P63D64PX 749.0 FE XV 1S22S22P63S2 1S(0) 1S22S22P63S3PX 747.0 FE XX 1S22S2P4 1S22S2P33S 746.0 FE XVI 1S22S22P63S 3S(1/2) 1S22S22P53S2X 739.0 FE XVII 1S22S22P6 1S22S22P53S 1PO 727.0 FE XVII 1S22S22P6 1S22S22P53S 3PO 725.0 FE XVI 1S22S22P63S 3S(1/2) 1S22S22P53S3D 723.0 FE XIII 1S22S22P63S23P2 3P(0) 1S22S22P53S23P3X 713.0 FE XII 1S22S22P63S23P3 4S(3/2)O 1S22S22P53S23P4X 708.0 FE XVI 1S22S22P63S 3S(1/2) 1S22S22P53S2 701.0 FE XI 1S22S22P63S23P4 1S22S22P53S23P5X 691.0 FE X 1S22S22P63S23P5 1S22S22P53S23P6X 656.0 FE XXVI 3 5 447.0 FE XXVI 3 4 338.0 FE XVI 1S22S22P63S 3S(1/2) 1S22S22P65P 318.0 FE XXVI 4 6 309.0 FE XVI 1S22S22P63P 1S22S22P65D 298.0 FE XV 1S22S22P63S3D 1S22S22P63S5P 268.0 FE XVII 1S22S22P53D 3PO 1S22S2P63D 265.0 FE XVI 1S22S22P63D 1S22S22P65F 246.0 FE XVI 1S22S22P63S 3S(1/2) 1S22S22P64P 234.0 FE XV 1S22S22P63S2 1S(0) 1S22S22P63S4P 227.0 FE XVI 1S22S22P63P 1S22S22P64D 210.0 FE XIV 1S22S22P63S23D 1S22S22P63S24F 210.0 FE XXVI 4 5 209.0 FE XV 1S22S22P63S3P 1PO 1S22S22P63S4D 207.0 FE XIII 1S22S22P63S3P3 1S22S22P63S3P24D 200.0 FE XIII 1S22S22P63S23P2 3P(0) 1S22S22P63S23P4D 195.0 FE XVI 1S22S22P63P 1S22S22P64S 188.0 FE XII 1S22S22P63S23P3 4S(3/2)O 3P24D 187.0 FE XVI 1S22S22P63D 1S22S22P64F 178.0 FE XV 1S22S22P63S3P 1PO 1S22S22P63S4S 177.0 FE XV 1S22S22P63S3D 1S22S22P63S4F 177.0 FE XIII 1S22S22P63S3P3 1S22S22P63S3P24S 175.0 FE XIV 1S22S22P63S23D 1S22S22P63S24P 174.0 FE XIII 1S22S22P63S23P2 3P(0) 1S22S22P63S23P4S 171.0 FE XI 1S22S22P63S23P4 1S22S22P63S23P34D 163.0 FE X 1S22S22P63S23P5 1S22S22P63S23P44D 161.0 FE XIV 1S22S22P63S23P 2P(1/2)O 1S22S22P63S23P 2P(3/2)O 156.0 FE XII 1S22S22P63S23P3 4S(3/2)O 3P24S 149.0 FE IX 1S22S22P63S23P6 1S22S22P63S23P54D 143.0 FE XI 1S22S22P63S23P4 1S22S22P63S23P34S 137.0 FE XIV 1S22S22P63S23P 2P(1/2)O 1S2S22P63S23P2X 133.0 FE VIII 1S22S22P63S23P63D 1S22S22P63S23P67F 130.0 FE XIV 1S22S22P63S23P 2P(1/2)O 1S22S22P63S24D 129.0 FE X 1S22S22P63S23P5 1S22S22P63S23P44S 127.0 FE XVI 1S22S22P63S 3S(1/2) 1S22S2P63S3X 126.0 FE XVII 1S22S22P6 1S22S22P53S 126.0 FE VIII 1S22S22P63S23P63D 1S22S22P63S23P66F 125.0 FE XVIII 1S22S22P5 2P(1/2)O 1S22S2P6X 121.0 FE XXII 1S22S22P 2P(1/2)O 1S22S2P2 2P 121.0 FE XIX 1S22S22P4 3P(0) 1S22S2P5X 120.0 FE XXI 1S22S22P2 3P(0) 1S22S2P3 3SO 120.0 FE IX 1S22S22P63S23P6 1S22S22P63S23P54S 1PO 119.0 FE XVIII 1S22S22P5 2P(1/2)O 1S22S2P6 118.0 FE IX 1S22S22P63S23P6 1S22S22P63S23P54S 3PO 115.0 FE VIII 1S22S22P63S23P63D 1S22S22P63S23P65F 114.0 FE XIX 1S22S22P4 3P(0) 1S22S2P5 108.0 FE XXVI 5 6 108.0 FE XX 1S22S22P3 4S(3/2)O 1S22S2P4X 106.0 FE XXI 1S22S22P2 3P(0) 1S22S2P3 3PO 106.0 FE XXII 1S22S22P 2P(1/2)O 1S22S2P2 2S 104.0 FE XX 1S22S22P3 4S(3/2)O 1S22S2P4 94.5 FE VIII 1S22S22P63S23P63D 1S22S22P63S23P64F 93.40 FE XXIII 1S22S2 1S(0) 1S22S2P 1PO 91.40 FE XXII 1S22S22P 2P(1/2)O 1S22S2P2 2D 87.0 FE XXI 1S22S22P2 3P(0) 1S22S2P3X 86.5 FE XXI 1S22S22P2 3P(0) 1S22S2P3 3DO 82.19 FE VII 1S22S22P63S23P63D2 1S22S22P63S23P63D4F