Isotopes of zirconium
Bold for isotopes with half-lives longer than the age of the universe (nearly stable) Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes Second most powerful known neutron absorber Fission product Long-lived fission product Believed to decay by β−β− to ⁹⁴Mo with a half-life over 1.1×10¹⁷ years Primordial radionuclide Theorized to also undergo β− decay to ⁹⁶Nb with a partial half-life greater than 2.4×10¹⁹ y
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
78Zr
40
38
77.95523(54)#
50# ms [>170 ns]
0+
79Zr
40
39
78.94916(43)#
56(30) ms
β+, p
78Sr
5/2+#
β+
79Y
80Zr
40
40
79.9404(16)
4.6(6) s
β+
80Y
0+
81Zr
40
41
80.93721(18)
5.5(4) s
β+ (>99.9%)
81Y
(3/2−)#
β+, p (<.1%)
80Sr
82Zr
40
42
81.93109(24)#
32(5) s
β+
82Y
0+
83Zr
40
43
82.92865(10)
41.6(24) s
β+ (>99.9%)
83Y
(1/2−)#
β+, p (<.1%)
82Sr
84Zr
40
44
83.92325(21)#
25.9(7) min
β+
84Y
0+
85Zr
40
45
84.92147(11)
7.86(4) min
β+
85Y
7/2+
85mZr
292.2(3) keV
10.9(3) s
IT (92%)
85Zr
(1/2−)
β+ (8%)
85Y
86Zr
40
46
85.91647(3)
16.5(1) h
β+
86Y
0+
87Zr
40
47
86.914816(9)
1.68(1) h
β+
87Y
(9/2)+
87mZr
335.84(19) keV
14.0(2) s
IT
87Zr
(1/2)−
88Zr
40
48
87.910227(11)
83.4(3) d
EC
88Y
0+
89Zr
40
49
88.908890(4)
78.41(12) h
β+
89Y
9/2+
89mZr
587.82(10) keV
4.161(17) min
IT (93.77%)
89Zr
1/2−
β+ (6.23%)
89Y
90Zr
40
50
89.9047044(25)
Stable
0+
0.5145(40)
90m1Zr
2319.000(10) keV
809.2(20) ms
IT
90Zr
5-
90m2Zr
3589.419(16) keV
131(4) ns
8+
91Zr
40
51
90.9056458(25)
Stable
5/2+
0.1122(5)
91mZr
3167.3(4) keV
4.35(14) µs
(21/2+)
92Zr
40
52
91.9050408(25)
Stable
0+
0.1715(8)
93Zr
40
53
92.9064760(25)
1.53(10)×106 y
β−
93Nb
5/2+
94Zr
40
54
93.9063152(26)
Observationally Stable
0+
0.1738(28)
95Zr
40
55
94.9080426(26)
64.032(6) d
β−
95Nb
5/2+
96Zr
40
56
95.9082734(30)
20(4)×1018 y
β−β−
96Mo
0+
0.0280(9)
97Zr
40
57
96.9109531(30)
16.744(11) h
β−
97mNb
1/2+
98Zr
40
58
97.912735(21)
30.7(4) s
β−
98Nb
0+
99Zr
40
59
98.916512(22)
2.1(1) s
β−
99mNb
1/2+
100Zr
40
60
99.91776(4)
7.1(4) s
β−
100Nb
0+
101Zr
40
61
100.92114(3)
2.3(1) s
β−
101Nb
3/2+
102Zr
40
62
101.92298(5)
2.9(2) s
β−
102Nb
0+
103Zr
40
63
102.92660(12)
1.3(1) s
β−
103Nb
(5/2−)
104Zr
40
64
103.92878(43)#
1.2(3) s
β−
104Nb
0+
105Zr
40
65
104.93305(43)#
0.6(1) s
β− (>99.9%)
105Nb
β−, n (<.1%)
104Nb
106Zr
40
66
105.93591(54)#
200# ms [>300 ns]
β−
106Nb
0+
107Zr
40
67
106.94075(32)#
150# ms [>300 ns]
β−
107Nb
108Zr
40
68
107.94396(64)#
80# ms [>300 ns]
β−
108Nb
0+
109Zr
40
69
108.94924(54)#
60# ms [>300 ns]
110Zr
40
70
109.95287(86)#
30# ms [>300 ns]
0+
The second most stable radioisotope is ⁹³Zr, which has a half-life of 1.53 million years.
⁹³Zr has a half-life of 1.53 years.
⁹³Zr has a half-life of 1.53 years.
⁹³Zr has a half-life of 1.53 years.
⁹³Zr has a half-life of 1.53 years.
<page_title> Isotopes of zirconium </page_title> <section_title> List of isotopes </section_title> <table> <cell> 93Zr <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 1.53(10)×106 y <col_header> half-life </col_header> </cell> </table>