Isotopes of cobalt
List of isotopes
Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes

Isotopes of cobalt

Section Title: List of isotopes
Table Section Text: Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)

excitation energy

47Co	27	20	47.01149(54)#	7/2−#

48Co	27	21	48.00176(43)#	p	47Fe	6+#

49Co	27	22	48.98972(28)#	<35 ns	p (>99.9%)	48Fe	7/2−#

β+ (<.1%)	49Fe

50Co	27	23	49.98154(18)#	44(4) ms	β+, p (54%)	49Mn	(6+)

β+ (46%)	50Fe

51Co	27	24	50.97072(16)#	60# ms [>200 ns]	β+	51Fe	7/2−#

52Co	27	25	51.96359(7)#	115(23) ms	β+	52Fe	(6+)

52mCo	380(100)# keV	104(11)# ms	β+	52Fe	2+#

IT	52Co

53Co	27	26	52.954219(19)	242(8) ms	β+	53Fe	7/2−#

53mCo	3197(29) keV	247(12) ms	β+ (98.5%)	53Fe	(19/2−)

p (1.5%)	52Fe

54Co	27	27	53.9484596(8)	193.28(7) ms	β+	54Fe	0+

54mCo	197.4(5) keV	1.48(2) min	β+	54Fe	(7)+

55Co	27	28	54.9419990(8)	17.53(3) h	β+	55Fe	7/2−

56Co	27	29	55.9398393(23)	77.233(27) d	β+	56Fe	4+

57Co	27	30	56.9362914(8)	271.74(6) d	EC	57Fe	7/2−

58Co	27	31	57.9357528(13)	70.86(6) d	β+	58Fe	2+

58m1Co	24.95(6) keV	9.04(11) h	IT	58Co	5+

58m2Co	53.15(7) keV	10.4(3) µs	4+

59Co	27	32	58.9331950(7)	Stable	7/2−	1.0000

60Co	27	33	59.9338171(7)	5.2713(8) y	β−, γ	60Ni	5+

60mCo	58.59(1) keV	10.467(6) min	IT (99.76%)	60Co	2+

β− (.24%)	60Ni

61Co	27	34	60.9324758(10)	1.650(5) h	β−	61Ni	7/2−

62Co	27	35	61.934051(21)	1.50(4) min	β−	62Ni	2+

62mCo	22(5) keV	13.91(5) min	β− (99%)	62Ni	5+

IT (1%)	62Co

63Co	27	36	62.933612(21)	26.9(4) s	β−	63Ni	7/2−

64Co	27	37	63.935810(21)	0.30(3) s	β−	64Ni	1+

65Co	27	38	64.936478(14)	1.20(6) s	β−	65Ni	(7/2)−

66Co	27	39	65.93976(27)	0.18(1) s	β−	66Ni	(3+)

66m1Co	175(3) keV	1.21(1) µs	(5+)

66m2Co	642(5) keV	>100 µs	(8-)

67Co	27	40	66.94089(34)	0.425(20) s	β−	67Ni	(7/2−)#

68Co	27	41	67.94487(34)	0.199(21) s	β−	68Ni	(7-)

68mCo	150(150)# keV	1.6(3) s	(3+)

69Co	27	42	68.94632(36)	227(13) ms	β− (>99.9%)	69Ni	7/2−#

β−, n (<.1%)	68Ni

70Co	27	43	69.9510(9)	119(6) ms	β− (>99.9%)	70Ni	(6-)

β−, n (<.1%)	69Ni

70mCo	200(200)# keV	500(180) ms	(3+)

71Co	27	44	70.9529(9)	97(2) ms	β− (>99.9%)	71Ni	7/2−#

β−, n (<.1%)	70Ni

72Co	27	45	71.95781(64)#	62(3) ms	β− (>99.9%)	72Ni	(6-,7-)

β−, n (<.1%)	71Ni

73Co	27	46	72.96024(75)#	41(4) ms	7/2−#

74Co	27	47	73.96538(86)#	50# ms [>300 ns]	0+

75Co	27	48	74.96833(86)#	40# ms [>300 ns]	7/2−#

Sentence(s)

⁵⁸Co had a half-life of 70.86 days.

final_sentence: ⁵⁸Co had a half-life of 70.86 days.