Isotopes of yttrium

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. Thirty-five 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

 * 76Y
 * style="text-align:right" | 39
 * style="text-align:right" | 37
 * 75.95845(54)#
 * 500# ns [>170 ns]
 * rowspan=2|77Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 38
 * rowspan=2|76.94965(7)#
 * rowspan=2|63(17) ms
 * p (>99.9%)
 * 76Sr
 * rowspan=2|5/2+#
 * rowspan=2|
 * β+ (<.1%)
 * 77Sr
 * 78Y
 * style="text-align:right" | 39
 * style="text-align:right" | 39
 * 77.94361(43)#
 * 54(5) ms
 * β+
 * 78Sr
 * (0+)
 * style="text-indent:1em" | 78mY
 * colspan="3" style="text-indent:2em" | 0(500)# keV
 * 5.8(5) s
 * 5+#
 * rowspan=2|79Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 40
 * rowspan=2|78.93735(48)
 * rowspan=2|14.8(6) s
 * β+ (>99.9%)
 * 79Sr
 * rowspan=2|(5/2+)#
 * rowspan=2|
 * β+, p (<.1%)
 * 78Rb
 * 80Y
 * style="text-align:right" | 39
 * style="text-align:right" | 41
 * 79.93428(19)
 * 30.1(5) s
 * β+
 * 80Sr
 * 4−
 * style="text-indent:1em" | 80m1Y
 * colspan="3" style="text-indent:2em" | 228.5(1) keV
 * 4.8(3) s
 * (1−)
 * style="text-indent:1em" | 80m2Y
 * colspan="3" style="text-indent:2em" | 312.6(9) keV
 * 4.7(3) μs
 * (2+)
 * 81Y
 * style="text-align:right" | 39
 * style="text-align:right" | 42
 * 80.92913(7)
 * 70.4(10) s
 * β+
 * 81Sr
 * (5/2+)
 * 82Y
 * style="text-align:right" | 39
 * style="text-align:right" | 43
 * 81.92679(11)
 * 8.30(20) s
 * β+
 * 82Sr
 * 1+
 * style="text-indent:1em" | 82m1Y
 * colspan="3" style="text-indent:2em" | 402.63(14) keV
 * 268(25) ns
 * 4−
 * style="text-indent:1em" | 82m2Y
 * colspan="3" style="text-indent:2em" | 507.50(13) keV
 * 147(7) ns
 * 6+
 * 83Y
 * style="text-align:right" | 39
 * style="text-align:right" | 44
 * 82.92235(5)
 * 7.08(6) min
 * β+
 * 83Sr
 * 9/2+
 * rowspan=2 style="text-indent:1em" | 83mY
 * rowspan=2 colspan="3" style="text-indent:2em" | 61.98(11) keV
 * rowspan=2|2.85(2) min
 * β+ (60%)
 * 83Sr
 * rowspan=2|(3/2−)
 * rowspan=2|
 * IT (40%)
 * 83Y
 * 84Y
 * style="text-align:right" | 39
 * style="text-align:right" | 45
 * 83.92039(10)
 * 39.5(8) min
 * β+
 * 84Sr
 * 1+
 * style="text-indent:1em" | 84mY
 * colspan="3" style="text-indent:2em" | −80(190) keV
 * 4.6(2) s
 * β+
 * 84Sr
 * (5−)
 * 85Y
 * style="text-align:right" | 39
 * style="text-align:right" | 46
 * 84.916433(20)
 * 2.68(5) h
 * β+
 * 85Sr
 * (1/2)−
 * rowspan=2 style="text-indent:1em" | 85m1Y
 * rowspan=2 colspan="3" style="text-indent:2em" | 19.8(5) keV
 * rowspan=2|4.86(13) h
 * β+ (99.998%)
 * 85Sr
 * rowspan=2|9/2+
 * rowspan=2|
 * IT (.002%)
 * 85Y
 * style="text-indent:1em" | 85m2Y
 * colspan="3" style="text-indent:2em" | 266.30(20) keV
 * 178(6) ns
 * 5/2−
 * 86Y
 * style="text-align:right" | 39
 * style="text-align:right" | 47
 * 85.914886(15)
 * 14.74(2) h
 * β+
 * 86Sr
 * 4−
 * rowspan=2 style="text-indent:1em" | 86m1Y
 * rowspan=2 colspan="3" style="text-indent:2em" | 218.30(20) keV
 * rowspan=2|48(1) min
 * IT (99.31%)
 * 86Y
 * rowspan=2|(8+)
 * rowspan=2|
 * β+ (.69%)
 * 86Sr
 * style="text-indent:1em" | 86m2Y
 * colspan="3" style="text-indent:2em" | 302.2(5) keV
 * 125(6) ns
 * (7−)
 * 87Y
 * style="text-align:right" | 39
 * style="text-align:right" | 48
 * 86.9108757(17)
 * 79.8(3) h
 * β+
 * 87Sr
 * 1/2−
 * rowspan=2 style="text-indent:1em" | 87mY
 * rowspan=2 colspan="3" style="text-indent:2em" | 380.82(7) keV
 * rowspan=2|13.37(3) h
 * IT (98.43%)
 * 87Y
 * rowspan=2|9/2+
 * rowspan=2|
 * β+ (1.56%)
 * 87Sr
 * 88Y
 * style="text-align:right" | 39
 * style="text-align:right" | 49
 * 87.9095011(20)
 * 106.616(13) d
 * β+
 * 88Sr
 * 4−
 * style="text-indent:1em" | 88m1Y
 * colspan="3" style="text-indent:2em" | 674.55(4) keV
 * 13.9(2) ms
 * IT
 * 88Y
 * (8)+
 * style="text-indent:1em" | 88m2Y
 * colspan="3" style="text-indent:2em" | 392.86(9) keV
 * 300(3) μs
 * 1+
 * 89Y
 * style="text-align:right" | 39
 * style="text-align:right" | 50
 * 88.9058483(27)
 * colspan=3 align=center|Stable
 * 1/2−
 * 1.0000
 * style="text-indent:1em" | 89mY
 * colspan="3" style="text-indent:2em" | 908.97(3) keV
 * 15.663(5) s
 * IT
 * 89Y
 * 9/2+
 * 90Y
 * style="text-align:right" | 39
 * style="text-align:right" | 51
 * 89.9071519(27)
 * 64.053(20) h
 * β−
 * 90Zr
 * 2−
 * rowspan=2 style="text-indent:1em" | 90mY
 * rowspan=2 colspan="3" style="text-indent:2em" | 681.67(10) keV
 * rowspan=2|3.19(6) h
 * IT (99.99%)
 * 90Y
 * rowspan=2|7+
 * rowspan=2|
 * β− (.0018%)
 * 90Zr
 * 91Y
 * style="text-align:right" | 39
 * style="text-align:right" | 52
 * 90.907305(3)
 * 58.51(6) d
 * β−
 * 91Zr
 * 1/2−
 * rowspan=2 style="text-indent:1em" | 91mY
 * rowspan=2 colspan="3" style="text-indent:2em" | 555.58(5) keV
 * rowspan=2|49.71(4) min
 * IT (98.5%)
 * 91Y
 * rowspan=2|9/2+
 * rowspan=2|
 * β− (1.5%)
 * 91Zr
 * 92Y
 * style="text-align:right" | 39
 * style="text-align:right" | 53
 * 91.908949(10)
 * 3.54(1) h
 * β−
 * 92Zr
 * 2−
 * 93Y
 * style="text-align:right" | 39
 * style="text-align:right" | 54
 * 92.909583(11)
 * 10.18(8) h
 * β−
 * 93Zr
 * 1/2−
 * style="text-indent:1em" | 93mY
 * colspan="3" style="text-indent:2em" | 758.719(21) keV
 * 820(40) ms
 * IT
 * 93Y
 * 7/2+
 * 94Y
 * style="text-align:right" | 39
 * style="text-align:right" | 55
 * 93.911595(8)
 * 18.7(1) min
 * β−
 * 94Zr
 * 2−
 * 95Y
 * style="text-align:right" | 39
 * style="text-align:right" | 56
 * 94.912821(8)
 * 10.3(1) min
 * β−
 * 95Zr
 * 1/2−
 * 96Y
 * style="text-align:right" | 39
 * style="text-align:right" | 57
 * 95.915891(25)
 * 5.34(5) s
 * β−
 * 96Zr
 * 0−
 * style="text-indent:1em" | 96mY
 * colspan="3" style="text-indent:2em" | 1140(30) keV
 * 9.6(2) s
 * β−
 * 96Zr
 * (8)+
 * rowspan=2|97Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 58
 * rowspan=2|96.918134(13)
 * rowspan=2|3.75(3) s
 * β− (99.942%)
 * 97Zr
 * rowspan=2|(1/2−)
 * rowspan=2|
 * β−, n (.058%)
 * 96Zr
 * rowspan=3 style="text-indent:1em" | 97m1Y
 * rowspan=3 colspan="3" style="text-indent:2em" | 667.51(23) keV
 * rowspan=3|1.17(3) s
 * β− (99.3%)
 * 97Zr
 * rowspan=3|(9/2)+
 * rowspan=3|
 * IT (.7%)
 * 97Y
 * β−, n (.08%)
 * 96Zr
 * style="text-indent:1em" | 97m2Y
 * colspan="3" style="text-indent:2em" | 3523.3(4) keV
 * 142(8) ms
 * (27/2−)
 * rowspan=2|98Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 59
 * rowspan=2|97.922203(26)
 * rowspan=2|0.548(2) s
 * β− (99.669%)
 * 98Zr
 * rowspan=2|(0)−
 * rowspan=2|
 * β−, n (.331%)
 * 97Zr
 * style="text-indent:1em" | 98m1Y
 * colspan="3" style="text-indent:2em" | 170.74(6) keV
 * 620(80) ns
 * (2)−
 * rowspan=3 style="text-indent:1em" | 98m2Y
 * rowspan=3 colspan="3" style="text-indent:2em" | 410(30) keV
 * rowspan=3|2.0(2) s
 * β− (86.6%)
 * 98Zr
 * rowspan=3|(5+,4−)
 * rowspan=3|
 * IT (10%)
 * 98Y
 * β−, n (3.4%)
 * 97Zr
 * style="text-indent:1em" | 98m3Y
 * colspan="3" style="text-indent:2em" | 496.19(15) keV
 * 7.6(4) μs
 * (2−)
 * style="text-indent:1em" | 98m4Y
 * colspan="3" style="text-indent:2em" | 1181.1(4) keV
 * 0.83(10) μs
 * (8−)
 * rowspan=2|99Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 60
 * rowspan=2|98.924636(26)
 * rowspan=2|1.470(7) s
 * β− (98.1%)
 * 99Zr
 * rowspan=2|(5/2+)
 * rowspan=2|
 * β−, n (1.9%)
 * 98Zr
 * style="text-indent:1em" | 99mY
 * colspan="3" style="text-indent:2em" | 2141.65(19) keV
 * 8.6(8) μs
 * (17/2+)
 * rowspan=2|100Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 61
 * rowspan=2|99.92776(8)
 * rowspan=2|735(7) ms
 * β− (98.98%)
 * 100Zr
 * rowspan=2|1−,2−
 * rowspan=2|
 * β−, n (1.02%)
 * 99Zr
 * style="text-indent:1em" | 100mY
 * colspan="3" style="text-indent:2em" | 200(200)# keV
 * 940(30) ms
 * β−
 * 100Zr
 * (3,4,5)(+#)
 * rowspan=2|101Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 62
 * rowspan=2|100.93031(10)
 * rowspan=2|426(20) ms
 * β− (98.06%)
 * 101Zr
 * rowspan=2|(5/2+)
 * rowspan=2|
 * β−, n (1.94%)
 * 100Zr
 * rowspan=2|102Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 63
 * rowspan=2|101.93356(9)
 * rowspan=2|0.30(1) s
 * β− (95.1%)
 * 102Zr
 * rowspan=2|
 * rowspan=2|
 * β−, n (4.9%)
 * 101Zr
 * rowspan=2 style="text-indent:1em" | 102mY
 * rowspan=2 colspan="3" style="text-indent:2em" | 200(200)# keV
 * rowspan=2|360(40) ms
 * β− (94%)
 * 102Zr
 * rowspan=2|high
 * rowspan=2|
 * β−, n (6%)
 * 101Zr
 * rowspan=2|103Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 64
 * rowspan=2|102.93673(32)#
 * rowspan=2|224(19) ms
 * β− (91.7%)
 * 103Zr
 * rowspan=2|5/2+#
 * rowspan=2|
 * β−, n (8.3%)
 * 102Zr
 * 104Y
 * style="text-align:right" | 39
 * style="text-align:right" | 65
 * 103.94105(43)#
 * 180(60) ms
 * β−
 * 104Zr
 * 105Y
 * style="text-align:right" | 39
 * style="text-align:right" | 66
 * 104.94487(54)#
 * 60# ms [>300 ns]
 * β−
 * 105Zr
 * 5/2+#
 * 106Y
 * style="text-align:right" | 39
 * style="text-align:right" | 67
 * 105.94979(75)#
 * 50# ms [>300 ns]
 * β−
 * 106Zr
 * 107Y
 * style="text-align:right" | 39
 * style="text-align:right" | 68
 * 106.95414(54)#
 * 30# ms [>300 ns]
 * 5/2+#
 * 108Y
 * style="text-align:right" | 39
 * style="text-align:right" | 69
 * 107.95948(86)#
 * 20# ms [>300 ns]
 * 109Y
 * style="text-align:right" | 39
 * style="text-align:right" | 70
 * 110Y
 * style="text-align:right" | 39
 * style="text-align:right" | 71
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * style="text-indent:1em" | 98m4Y
 * colspan="3" style="text-indent:2em" | 1181.1(4) keV
 * 0.83(10) μs
 * (8−)
 * rowspan=2|99Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 60
 * rowspan=2|98.924636(26)
 * rowspan=2|1.470(7) s
 * β− (98.1%)
 * 99Zr
 * rowspan=2|(5/2+)
 * rowspan=2|
 * β−, n (1.9%)
 * 98Zr
 * style="text-indent:1em" | 99mY
 * colspan="3" style="text-indent:2em" | 2141.65(19) keV
 * 8.6(8) μs
 * (17/2+)
 * rowspan=2|100Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 61
 * rowspan=2|99.92776(8)
 * rowspan=2|735(7) ms
 * β− (98.98%)
 * 100Zr
 * rowspan=2|1−,2−
 * rowspan=2|
 * β−, n (1.02%)
 * 99Zr
 * style="text-indent:1em" | 100mY
 * colspan="3" style="text-indent:2em" | 200(200)# keV
 * 940(30) ms
 * β−
 * 100Zr
 * (3,4,5)(+#)
 * rowspan=2|101Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 62
 * rowspan=2|100.93031(10)
 * rowspan=2|426(20) ms
 * β− (98.06%)
 * 101Zr
 * rowspan=2|(5/2+)
 * rowspan=2|
 * β−, n (1.94%)
 * 100Zr
 * rowspan=2|102Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 63
 * rowspan=2|101.93356(9)
 * rowspan=2|0.30(1) s
 * β− (95.1%)
 * 102Zr
 * rowspan=2|
 * rowspan=2|
 * β−, n (4.9%)
 * 101Zr
 * rowspan=2 style="text-indent:1em" | 102mY
 * rowspan=2 colspan="3" style="text-indent:2em" | 200(200)# keV
 * rowspan=2|360(40) ms
 * β− (94%)
 * 102Zr
 * rowspan=2|high
 * rowspan=2|
 * β−, n (6%)
 * 101Zr
 * rowspan=2|103Y
 * rowspan=2 style="text-align:right" | 39
 * rowspan=2 style="text-align:right" | 64
 * rowspan=2|102.93673(32)#
 * rowspan=2|224(19) ms
 * β− (91.7%)
 * 103Zr
 * rowspan=2|5/2+#
 * rowspan=2|
 * β−, n (8.3%)
 * 102Zr
 * 104Y
 * style="text-align:right" | 39
 * style="text-align:right" | 65
 * 103.94105(43)#
 * 180(60) ms
 * β−
 * 104Zr
 * 105Y
 * style="text-align:right" | 39
 * style="text-align:right" | 66
 * 104.94487(54)#
 * 60# ms [>300 ns]
 * β−
 * 105Zr
 * 5/2+#
 * 106Y
 * style="text-align:right" | 39
 * style="text-align:right" | 67
 * 105.94979(75)#
 * 50# ms [>300 ns]
 * β−
 * 106Zr
 * 107Y
 * style="text-align:right" | 39
 * style="text-align:right" | 68
 * 106.95414(54)#
 * 30# ms [>300 ns]
 * 5/2+#
 * 108Y
 * style="text-align:right" | 39
 * style="text-align:right" | 69
 * 107.95948(86)#
 * 20# ms [>300 ns]
 * 109Y
 * style="text-align:right" | 39
 * style="text-align:right" | 70
 * 110Y
 * style="text-align:right" | 39
 * style="text-align:right" | 71
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * 106Y
 * style="text-align:right" | 39
 * style="text-align:right" | 67
 * 105.94979(75)#
 * 50# ms [>300 ns]
 * β−
 * 106Zr
 * 107Y
 * style="text-align:right" | 39
 * style="text-align:right" | 68
 * 106.95414(54)#
 * 30# ms [>300 ns]
 * 5/2+#
 * 108Y
 * style="text-align:right" | 39
 * style="text-align:right" | 69
 * 107.95948(86)#
 * 20# ms [>300 ns]
 * 109Y
 * style="text-align:right" | 39
 * style="text-align:right" | 70
 * 110Y
 * style="text-align:right" | 39
 * style="text-align:right" | 71
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * 109Y
 * style="text-align:right" | 39
 * style="text-align:right" | 70
 * 110Y
 * style="text-align:right" | 39
 * style="text-align:right" | 71
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * 110Y
 * style="text-align:right" | 39
 * style="text-align:right" | 71
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * style="text-align:right" | 39
 * style="text-align:right" | 71
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * 111Y
 * style="text-align:right" | 39
 * style="text-align:right" | 72
 * style="text-align:right" | 72