| 释义 |
- List of isotopes Notes
- References
{{infobox yttrium isotopes}}Natural yttrium (39Y) is composed of a single isotope yttrium-89. 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. List of isotopes nuclide
symbol | Z(p) | N(n) |
isotopic mass (u)
| half-life | decay
mode(s)[1][2] | daughter
isotope(s)[3] | nuclear
spin and
parity | 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) | 39.5(8) min | β+ | 84Sr | 1+ | | 84mY | −80(190) keV | 4.6(2) s | 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[4] | 39 | 50 | 88.9058483(27) | Stable | 1/2− | 1.0000 | | 89mY | 908.97(3) keV | 15.663(5) s | IT | 89Y | 9/2+ | | 90Y[4] | 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[4] | 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] |
1. ^{{cite web |url=http://www.nucleonica.net/unc.aspx |title=Universal Nuclide Chart |publisher=nucleonica |registration=yes}}
2. ^Abbreviations:
EC: Electron capture
IT: Isomeric transition
3. ^Bold for stable isotopes, bold italics for nearly-stable isotopes (half-life longer than the age of the universe)
4. ^1 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 - Isotope masses from:
- Isotopic compositions and standard atomic masses from:
- {{CAWIA 2003}}
- {{CIAAW 2005}}
- Half-life, spin, and isomer data selected from the following sources. See editing notes on this article's talk page.
- {{NUBASE 2003}}
- {{NNDC}}
- {{CRC85|chapter=11}}
- {{cite journal |author = E. V. Marathe |title= The Half-Life of Yttrium-90 |journal=Journal of Scientific & Industrial Research |edition =Vol 14B |date=July 1955 |pages=354–355 }}
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