Isotopes of yttrium
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Natural yttrium (Y) is composed of a single isotope 89Y. The most stable radioisotopes are 88Y, which has a half-life of 106.6 days and 91Y with a half-life of 58.51 days. All the other isotopes have half-lives of less than a day, except 87Y, which has a half-life of 79.8 hours, and 90Y, with 64 hours. The dominant decay mode below the stable 89Y is electron capture and the dominant mode after it is beta emission. Twenty-six unstable isotopes have been characterized.
90Y exists in equilibrium with its parent isotope strontium-90, which is a product of nuclear fission.
Relative atomic mass: 88.90585(2)
Table
nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s)[1][n 1] |
daughter isotope(s)[n 2] |
nuclear spin |
representative isotopic composition (mole fraction) |
---|---|---|---|---|---|---|---|---|
excitation energy | ||||||||
76Y | 39 | 37 | 75.95845(54)# | 500# ns [>170 ns] | ||||
77Y | 39 | 38 | 76.94965(7)# | 63(17) ms | p (>99.9%) | 76Sr | 5/2+# | |
β+ (<.1%) | 77Sr | |||||||
78Y | 39 | 39 | 77.94361(43)# | 54(5) ms | β+ | 78Sr | (0+) | |
78mY | 0(500)# keV | 5.8(5) s | 5+# | |||||
79Y | 39 | 40 | 78.93735(48) | 14.8(6) s | β+ (>99.9%) | 79Sr | (5/2+)# | |
β+, p (<.1%) | 78Rb | |||||||
80Y | 39 | 41 | 79.93428(19) | 30.1(5) s | β+ | 80Sr | 4− | |
80m1Y | 228.5(1) keV | 4.8(3) s | (1−) | |||||
80m2Y | 312.6(9) keV | 4.7(3) µs | (2+) | |||||
81Y | 39 | 42 | 80.92913(7) | 70.4(10) s | β+ | 81Sr | (5/2+) | |
82Y | 39 | 43 | 81.92679(11) | 8.30(20) s | β+ | 82Sr | 1+ | |
82m1Y | 402.63(14) keV | 268(25) ns | 4− | |||||
82m2Y | 507.50(13) keV | 147(7) ns | 6+ | |||||
83Y | 39 | 44 | 82.92235(5) | 7.08(6) min | β+ | 83Sr | 9/2+ | |
83mY | 61.98(11) keV | 2.85(2) min | β+ (60%) | 83Sr | (3/2−) | |||
IT (40%) | 83Y | |||||||
84Y | 39 | 45 | 83.92039(10) | 4.6(2) s | β+ | 84Sr | 1+ | |
84mY | −80(190) keV | 39.5(8) min | β+ | 84Sr | (5−) | |||
85Y | 39 | 46 | 84.916433(20) | 2.68(5) h | β+ | 85Sr | (1/2)− | |
85m1Y | 19.8(5) keV | 4.86(13) h | β+ (99.998%) | 85Sr | 9/2+ | |||
IT (.002%) | 85Y | |||||||
85m2Y | 266.30(20) keV | 178(6) ns | 5/2− | |||||
86Y | 39 | 47 | 85.914886(15) | 14.74(2) h | β+ | 86Sr | 4− | |
86m1Y | 218.30(20) keV | 48(1) min | IT (99.31%) | 86Y | (8+) | |||
β+ (.69%) | 86Sr | |||||||
86m2Y | 302.2(5) keV | 125(6) ns | (7−) | |||||
87Y | 39 | 48 | 86.9108757(17) | 79.8(3) h | β+ | 87Sr | 1/2− | |
87mY | 380.82(7) keV | 13.37(3) h | IT (98.43%) | 87Y | 9/2+ | |||
β+ (1.56%) | 87Sr | |||||||
88Y | 39 | 49 | 87.9095011(20) | 106.616(13) d | β+ | 88Sr | 4− | |
88m1Y | 674.55(4) keV | 13.9(2) ms | IT | 88Y | (8)+ | |||
88m2Y | 392.86(9) keV | 300(3) µs | 1+ | |||||
89Y[n 3] | 39 | 50 | 88.9058483(27) | Stable | 1/2− | 1.0000 | ||
89mY | 908.97(3) keV | 15.663(5) s | IT | 89Y | 9/2+ | |||
90Y[n 3] | 39 | 51 | 89.9071519(27) | 64.053(20) h | β− | 90Zr | 2− | |
90mY | 681.67(10) keV | 3.19(6) h | IT (99.99%) | 90Y | 7+ | |||
β− (.0018%) | 90Zr | |||||||
91Y[n 3] | 39 | 52 | 90.907305(3) | 58.51(6) d | β− | 91Zr | 1/2− | |
91mY | 555.58(5) keV | 49.71(4) min | IT (98.5%) | 91Y | 9/2+ | |||
β− (1.5%) | 91Zr | |||||||
92Y | 39 | 53 | 91.908949(10) | 3.54(1) h | β− | 92Zr | 2− | |
93Y | 39 | 54 | 92.909583(11) | 10.18(8) h | β− | 93Zr | 1/2− | |
93mY | 758.719(21) keV | 820(40) ms | IT | 93Y | 7/2+ | |||
94Y | 39 | 55 | 93.911595(8) | 18.7(1) min | β− | 94Zr | 2− | |
95Y | 39 | 56 | 94.912821(8) | 10.3(1) min | β− | 95Zr | 1/2− | |
96Y | 39 | 57 | 95.915891(25) | 5.34(5) s | β− | 96Zr | 0− | |
96mY | 1140(30) keV | 9.6(2) s | β− | 96Zr | (8)+ | |||
97Y | 39 | 58 | 96.918134(13) | 3.75(3) s | β− (99.942%) | 97Zr | (1/2−) | |
β−, n (.058%) | 96Zr | |||||||
97m1Y | 667.51(23) keV | 1.17(3) s | β− (99.3%) | 97Zr | (9/2)+ | |||
IT (.7%) | 97Y | |||||||
β−, n (.08%) | 96Zr | |||||||
97m2Y | 3523.3(4) keV | 142(8) ms | (27/2−) | |||||
98Y | 39 | 59 | 97.922203(26) | 0.548(2) s | β− (99.669%) | 98Zr | (0)− | |
β−, n (.331%) | 97Zr | |||||||
98m1Y | 170.74(6) keV | 620(80) ns | (2)− | |||||
98m2Y | 410(30) keV | 2.0(2) s | β− (86.6%) | 98Zr | (5+,4−) | |||
IT (10%) | 98Y | |||||||
β−, n (3.4%) | 97Zr | |||||||
98m3Y | 496.19(15) keV | 7.6(4) µs | (2−) | |||||
98m4Y | 1181.1(4) keV | 0.83(10) µs | (8−) | |||||
99Y | 39 | 60 | 98.924636(26) | 1.470(7) s | β− (98.1%) | 99Zr | (5/2+) | |
β−, n (1.9%) | 98Zr | |||||||
99mY | 2141.65(19) keV | 8.6(8) µs | (17/2+) | |||||
100Y | 39 | 61 | 99.92776(8) | 735(7) ms | β− (98.98%) | 100Zr | 1−,2− | |
β−, n (1.02%) | 99Zr | |||||||
100mY | 200(200)# keV | 940(30) ms | β− | 100Zr | (3,4,5)(+#) | |||
101Y | 39 | 62 | 100.93031(10) | 426(20) ms | β− (98.06%) | 101Zr | (5/2+) | |
β−, n (1.94%) | 100Zr | |||||||
102Y | 39 | 63 | 101.93356(9) | 0.30(1) s | β− (95.1%) | 102Zr | ||
β−, n (4.9%) | 101Zr | |||||||
102mY | 200(200)# keV | 360(40) ms | β− (94%) | 102Zr | high | |||
β−, n (6%) | 101Zr | |||||||
103Y | 39 | 64 | 102.93673(32)# | 224(19) ms | β− (91.7%) | 103Zr | 5/2+# | |
β−, n (8.3%) | 102Zr | |||||||
104Y | 39 | 65 | 103.94105(43)# | 180(60) ms | β− | 104Zr | ||
105Y | 39 | 66 | 104.94487(54)# | 60# ms [>300 ns] | β− | 105Zr | 5/2+# | |
106Y | 39 | 67 | 105.94979(75)# | 50# ms [>300 ns] | β− | 106Zr | ||
107Y | 39 | 68 | 106.95414(54)# | 30# ms [>300 ns] | 5/2+# | |||
108Y | 39 | 69 | 107.95948(86)# | 20# ms [>300 ns] |
- ↑ Abbreviations:
EC: Electron capture
IT: Isomeric transition - ↑ Bold for stable isotopes, bold italics for nearly-stable isotopes (half-life longer than the age of the universe)
- ↑ 3.0 3.1 3.2 Fission product
Notes
- Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
- Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC, which use expanded uncertainties.
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- Isotope masses from:
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- Isotopic compositions and standard atomic masses from:
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- Half-life, spin, and isomer data selected from the following sources. See editing notes on this article's talk page.
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Isotopes of strontium | Isotopes of yttrium | Isotopes of zirconium |
Table of nuclides |
Isotopes of the chemical elements | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 H |
2 He |
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3 Li |
4 Be |
5 B |
6 C |
7 N |
8 O |
9 F |
10 Ne |
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11 Na |
12 Mg |
13 Al |
14 Si |
15 P |
16 S |
17 Cl |
18 Ar |
||||||||||
19 K |
20 Ca |
21 Sc |
22 Ti |
23 V |
24 Cr |
25 Mn |
26 Fe |
27 Co |
28 Ni |
29 Cu |
30 Zn |
31 Ga |
32 Ge |
33 As |
34 Se |
35 Br |
36 Kr |
37 Rb |
38 Sr |
39 Y |
40 Zr |
41 Nb |
42 Mo |
43 Tc |
44 Ru |
45 Rh |
46 Pd |
47 Ag |
48 Cd |
49 In |
50 Sn |
51 Sb |
52 Te |
53 I |
54 Xe |
55 Cs |
56 Ba |
72 Hf |
73 Ta |
74 W |
75 Re |
76 Os |
77 Ir |
78 Pt |
79 Au |
80 Hg |
81 Tl |
82 Pb |
83 Bi |
84 Po |
85 At |
86 Rn |
|
87 Fr |
88 Ra |
104 Rf |
105 Db |
106 Sg |
107 Bh |
108 Hs |
109 Mt |
110 Ds |
111 Rg |
112 Cn |
113 Uut |
114 Fl |
115 Uup |
116 Lv |
117 Uus |
118 Uuo |
|
57 La |
58 Ce |
59 Pr |
60 Nd |
61 Pm |
62 Sm |
63 Eu |
64 Gd |
65 Tb |
66 Dy |
67 Ho |
68 Er |
69 Tm |
70 Yb |
71 Lu |
|||
89 Ac |
90 Th |
91 Pa |
92 U |
93 Np |
94 Pu |
95 Am |
96 Cm |
97 Bk |
98 Cf |
99 Es |
100 Fm |
101 Md |
102 No |
103 Lr |
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