鐵的同位素

鐵 (原子質量單位: 55.845(2) )共有34個同位素，其中有3個是穩定的。

圖表

符號	Z(p)	N(n)	質量(原子質量單位)	半衰期	原子核自旋	相對豐度	相對豐度的變化率
	激發能量
45Fe	26	19	45.01458(24)#	4.9(15) ms [3.8(+20-8) ms]	3/2+#
46Fe	26	20	46.00081(38)#	9(4) ms [12(+4-3) ms]	0+
47Fe	26	21	46.99289(28)#	21.8(7) ms	7/2-#
48Fe	26	22	47.98050(8)#	44(7) ms	0+
49Fe	26	23	48.97361(16)#	70(3) ms	(7/2-)
50Fe	26	24	49.96299(6)	155(11) ms	0+
51Fe	26	25	50.956820(16)	305(5) ms	5/2-
52Fe	26	26	51.948114(7)	8.275(8) h	0+
52mFe	6.81(13) MeV			45.9(6) s	(12+)#
53Fe	26	27	52.9453079(19)	8.51(2) min	7/2-
53mFe	3040.4(3) keV			2.526(24) min	19/2-
54Fe	26	28	53.9396105(7)	稳定 [>3.1E+22 a]	0+	0.05845(35)	0.05837-0.05861
54mFe	6526.9(6) keV			364(7) ns	10+
55Fe	26	29	54.9382934(7)	2.737(11) a	3/2-
56Fe	26	30	55.9349375(7)	穩定	0+	0.91754(36)	0.91742-0.91760
57Fe	26	31	56.9353940(7)	穩定	1/2-	0.02119(10)	0.02116-0.02121
58Fe	26	32	57.9332756(8)	穩定	0+	0.00282(4)	0.00281-0.00282
59Fe	26	33	58.9348755(8)	44.495(9) d	3/2-
60Fe	26	34	59.934072(4)	1.5(3)E+6 a	0+
61Fe	26	35	60.936745(21)	5.98(6) min	3/2-,5/2-
61mFe	861(3) keV			250(10) ns	9/2+#
62Fe	26	36	61.936767(16)	68(2) s	0+
63Fe	26	37	62.94037(18)	6.1(6) s	(5/2)-
64Fe	26	38	63.9412(3)	2.0(2) s	0+
65Fe	26	39	64.94538(26)	1.3(3) s	1/2-#
65mFe	364(3) keV			430(130) ns	(5/2-)
66Fe	26	40	65.94678(32)	440(40) ms	0+
67Fe	26	41	66.95095(45)	394(9) ms	1/2-#
67mFe	367(3) keV			64(17) µs	(5/2-)
68Fe	26	42	67.95370(75)	187(6) ms	0+
69Fe	26	43	68.95878(54)#	109(9) ms	1/2-#
70Fe	26	44	69.96146(64)#	94(17) ms	0+
71Fe	26	45	70.96672(86)#	30# ms [>300 ns]	7/2+#
72Fe	26	46	71.96962(86)#	10# ms [>300 ns]	0+

備註:畫上#號的數據代表沒有經過實驗的証明，只是理論推測而已，而用括號括起來的代表數據不確定性。

←	同位素列表	→
錳的同位素	鐵的同位素	鈷的同位素

参考文献

• Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
• Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
• Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
  • Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
  • National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
  • David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.