Isotopes of polonium

There are 42 isotopes of polonium (84Po). They range in size from 186 to 227 nucleons. They are all radioactive. 210Po with a half-life of 138.376 days has the longest half-life of any naturally-occurring isotope of polonium and is the most common isotope of polonium. It is also the most easily synthesized polonium isotope. 209Po, which does not occur naturally, has the longest half-life of all isotopes of polonium at 124 years. 209Po can be made by using a cyclotron to bombard bismuth with protons, as can 208Po.

List of isotopes

 * 186Po
 * style="text-align:right" | 84
 * style="text-align:right" | 102
 * 186.004403(20)
 * α
 * 182Pb
 * 0+
 * 187Po
 * style="text-align:right" | 84
 * style="text-align:right" | 103
 * 187.003030(40)
 * 1.40(25) ms
 * α
 * 183Pb
 * 1/2−, 5/2−
 * style="text-indent:1em" | 187mPo
 * colspan="3" style="text-indent:2em" | 4(27) keV
 * 0.5 ms
 * α
 * 183Pb
 * 13/2+#
 * 188Po
 * style="text-align:right" | 84
 * style="text-align:right" | 104
 * 187.999416(21)
 * 270(30) μs
 * α
 * 184Pb
 * 0+
 * 189Po
 * style="text-align:right" | 84
 * style="text-align:right" | 105
 * 188.998473(24)
 * 3.5(5) ms
 * α
 * 185Pb
 * (5/2−)
 * 190Po
 * style="text-align:right" | 84
 * style="text-align:right" | 106
 * 189.995102(14)
 * 2.45(5) ms
 * α
 * 186Pb
 * 0+
 * 191Po
 * style="text-align:right" | 84
 * style="text-align:right" | 107
 * 190.994558(8)
 * 22(1) ms
 * α
 * 187Pb
 * 3/2−
 * style="text-indent:1em" | 191mPo
 * colspan="3" style="text-indent:2em" | 61(11) keV
 * 93(3) ms
 * α
 * 187mPb
 * 13/2+
 * 192Po
 * style="text-align:right" | 84
 * style="text-align:right" | 108
 * 191.991340(11)
 * 32.2(3) ms
 * α
 * 188Pb
 * 0+
 * style="text-indent:1em" | 192mPo
 * colspan="3" style="text-indent:2em" | 2294.6(10) keV
 * 580(100) ns
 * IT
 * 192Po
 * 11-
 * 193Po
 * style="text-align:right" | 84
 * style="text-align:right" | 109
 * 192.991062(16)
 * 399(34) ms
 * α
 * 189Pb
 * 3/2−
 * style="text-indent:1em" | 193mPo
 * colspan="3" style="text-indent:2em" | 100(6) keV
 * 245(11) ms
 * α
 * 189mPb
 * 13/2+
 * 194Po
 * style="text-align:right" | 84
 * style="text-align:right" | 110
 * 193.988186(14)
 * 392(4) ms
 * α
 * 190Pb
 * 0+
 * style="text-indent:1em" | 194mPo
 * colspan="3" style="text-indent:2em" | 2313.4(3) keV
 * 12.9(5) μs
 * IT
 * 194Po
 * (10−)
 * rowspan=2|195Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 111
 * rowspan=2| 194.988066(6)
 * rowspan=2|4.64(9) s
 * α (94%)
 * 191Pb
 * rowspan=2|3/2−
 * rowspan=2|
 * β+?
 * 195Bi
 * style="text-indent:1em" | 195mPo
 * colspan="3" style="text-indent:2em" | 148(9) keV
 * 1.92(2) s
 * α
 * 191mPb
 * 13/2+
 * rowspan=2|196Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 112
 * rowspan=2|195.985541(6)
 * rowspan=2|5.56(12) s
 * α (94%)
 * 192Pb
 * rowspan=2|0+
 * rowspan=2|
 * β+?
 * 196Bi
 * style="text-indent:1em" | 196mPo
 * colspan="3" style="text-indent:2em" | 2493.9(4) keV
 * 856(17) ns
 * IT
 * 196Po
 * 11−
 * rowspan=2|197Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 113
 * rowspan=2|196.985622(11)
 * rowspan=2|53.6(9) s
 * β+?
 * 197Bi
 * rowspan=2|(3/2−)
 * rowspan=2|
 * α (44%)
 * 193Pb
 * rowspan=3 style="text-indent:1em" | 197mPo
 * rowspan=3|
 * rowspan=3 colspan="3" style="text-indent:2em" | 196(12)# keV
 * rowspan=3|25.8(1) s
 * α (84%)
 * 193mPb
 * rowspan=3|13/2+
 * rowspan=3|
 * β+?
 * 197Bi
 * IT?
 * 197Po
 * rowspan=2|198Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 114
 * rowspan=2|197.983389(19)
 * rowspan=2|1.760(24) min
 * α (57%)
 * 194Pb
 * rowspan=2|0+
 * rowspan=2|
 * β+ (43%)
 * 198Bi
 * style="text-indent:1em" | 198m1Po
 * colspan="3" style="text-indent:2em" | 2565.92(20) keV
 * 200(20) ns
 * IT
 * 198Po
 * 11−
 * style="text-indent:1em" | 198m2Po
 * colspan="3" style="text-indent:2em" | 2740(50)# keV
 * 750(50) ns
 * IT
 * 198Po
 * 12+
 * rowspan=2|199Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 115
 * rowspan=2|198.983666(25)
 * rowspan=2|5.48(16) min
 * β+ (92.5%)
 * 199Bi
 * rowspan=2|(3/2−)
 * rowspan=2|
 * α (7.5%)
 * 195Pb
 * rowspan=3 style="text-indent:1em" | 199mPo
 * rowspan=3|
 * rowspan=3 colspan="3" style="text-indent:2em" | 312.0(28) keV
 * rowspan=3|4.17(4) min
 * β+ (73.5%)
 * 199Bi
 * rowspan=3|13/2+
 * rowspan=3|
 * α (24%)
 * 195Pb
 * IT (2.5%)
 * 199Po
 * rowspan=2|200Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 116
 * rowspan=2|199.981799(15)
 * rowspan=2|11.5(1) min
 * β+ (88.8%)
 * 200Bi
 * rowspan=2|0+
 * rowspan=2|
 * α (11.1%)
 * 196Pb
 * rowspan=2|201Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 117
 * rowspan=2|200.982260(6)
 * rowspan=2|15.3(2) min
 * β+ (98.4%)
 * 201Bi
 * rowspan=2|3/2−
 * rowspan=2|
 * α (1.6%)
 * 197Pb
 * rowspan=3 style="text-indent:1em" | 201mPo
 * rowspan=3|
 * rowspan=3 colspan="3" style="text-indent:2em" | 424.1(24) keV
 * rowspan=3|8.9(2) min
 * IT (56.2(12)%)
 * 201Po
 * rowspan=3|13/2+
 * rowspan=3|
 * β+ (41.4(7)%)
 * 201Bi
 * α (2.4(5)%)
 * 197Pb
 * rowspan=2|202Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 118
 * rowspan=2|201.980758(16)
 * rowspan=2|44.7(5) min
 * β+ (98%)
 * 202Bi
 * rowspan=2|0+
 * rowspan=2|
 * α (2%)
 * 198Pb
 * style="text-indent:1em" | 202mPo
 * colspan="3" style="text-indent:2em" | 2626.7(7) keV
 * >200 ns
 * 11−
 * rowspan=2|203Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 119
 * rowspan=2|202.981420(28)
 * rowspan=2|36.7(5) min
 * β+ (99.89%)
 * 203Bi
 * rowspan=2|5/2−
 * rowspan=2|
 * α (.11%)
 * 199Pb
 * rowspan=2 style="text-indent:1em" | 203m1Po
 * rowspan=2|
 * rowspan=2 colspan="3" style="text-indent:2em" | 641.49(17) keV
 * rowspan=2|45(2) s
 * IT (99.96%)
 * 203Po
 * rowspan=2|13/2+
 * rowspan=2|
 * α (.04%)
 * 199Pb
 * style="text-indent:1em" | 203m2Po
 * colspan="3" style="text-indent:2em" | 2158.5(6) keV
 * >200 ns
 * rowspan=2|204Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 120
 * rowspan=2|203.980318(12)
 * rowspan=2|3.53(2) h
 * β+ (99.33%)
 * 204Bi
 * rowspan=2|0+
 * rowspan=2|
 * α (.66%)
 * 200Pb
 * rowspan=2|205Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 121
 * rowspan=2|204.981203(21)
 * rowspan=2|1.66(2) h
 * β+ (99.96%)
 * 205Bi
 * rowspan=2|5/2−
 * rowspan=2|
 * α (.04%)
 * 201Pb
 * style="text-indent:1em" | 205m1Po
 * colspan="3" style="text-indent:2em" | 143.166(17) keV
 * 310(60) ns
 * 1/2−
 * style="text-indent:1em" | 205m2Po
 * colspan="3" style="text-indent:2em" | 880.30(4) keV
 * 645 μs
 * 13/2+
 * style="text-indent:1em" | 205m3Po
 * colspan="3" style="text-indent:2em" | 1461.21(21) keV
 * 57.4(9) ms
 * IT
 * 205Po
 * 19/2−
 * style="text-indent:1em" | 205m4Po
 * colspan="3" style="text-indent:2em" | 3087.2(4) keV
 * 115(10) ns
 * 29/2−
 * rowspan=2|206Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 122
 * rowspan=2|205.980481(9)
 * rowspan=2|8.8(1) d
 * β+ (94.55%)
 * 206Bi
 * rowspan=2|0+
 * rowspan=2|
 * α (5.45%)
 * 202Pb
 * style="text-indent:1em" | 206m1Po
 * colspan="3" style="text-indent:2em" | 1585.85(11) keV
 * 222(10) ns
 * (8+)#
 * style="text-indent:1em" | 206m2Po
 * colspan="3" style="text-indent:2em" | 2262.22(14) keV
 * 1.05(6) μs
 * (9−)#
 * rowspan=2|207Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 123
 * rowspan=2|206.981593(7)
 * rowspan=2|5.80(2) h
 * β+ (99.97%)
 * 207Bi
 * rowspan=2|5/2−
 * rowspan=2|
 * α (.021%)
 * 203Pb
 * style="text-indent:1em" | 207m1Po
 * colspan="3" style="text-indent:2em" | 68.573(14) keV
 * 205(10) ns
 * 1/2−
 * style="text-indent:1em" | 207m2Po
 * colspan="3" style="text-indent:2em" | 1115.073(16) keV
 * 49(4) μs
 * 13/2+
 * style="text-indent:1em" | 207m3Po
 * colspan="3" style="text-indent:2em" | 1383.15(6) keV
 * 2.79(8) s
 * IT
 * 207Po
 * 19/2−
 * rowspan=2|208Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 124
 * rowspan=2|207.9812457(19)
 * rowspan=2|2.898(2) y
 * α (99.99%)
 * 204Pb
 * rowspan=2|0+
 * rowspan=2|
 * β+ (.00277%)
 * 208Bi
 * rowspan=2|209Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 125
 * rowspan=2|208.9824304(20)
 * rowspan=2|124(3) y
 * α (99.546%)
 * 205Pb
 * rowspan=2|1/2−
 * rowspan=2|
 * β+ (.454%)
 * 209Bi
 * 210Po
 * Radium F
 * style="text-align:right" | 84
 * style="text-align:right" | 126
 * 209.9828737(13)
 * 138.376(2) d
 * α
 * 206Pb
 * 0+
 * Trace
 * style="text-indent:1em" | 210mPo
 * colspan="3" style="text-indent:2em" | 5057.61(4) keV
 * 263(5) ns
 * 16+
 * 211Po
 * Actinium C'
 * style="text-align:right" | 84
 * style="text-align:right" | 127
 * 210.9866532(14)
 * 516(3) ms
 * α
 * 207Pb
 * 9/2+
 * Trace
 * rowspan=2 style="text-indent:1em" | 211m1Po
 * rowspan=2|
 * rowspan=2 colspan="3" style="text-indent:2em" | 1462(5) keV
 * rowspan=2|25.2(6) s
 * α (99.98%)
 * 207Pb
 * rowspan=2|(25/2+)
 * rowspan=2|
 * IT (.016%)
 * 211Po
 * style="text-indent:1em" | 211m2Po
 * colspan="3" style="text-indent:2em" | 2135.7(9) keV
 * 243(21) ns
 * (31/2−)
 * style="text-indent:1em" | 211m3Po
 * colspan="3" style="text-indent:2em" | 4873.3(17) keV
 * 2.8(7) μs
 * (43/2+)
 * 212Po
 * Thorium C'
 * style="text-align:right" | 84
 * style="text-align:right" | 128
 * 211.9888680(13)
 * 294.4(8) ns
 * α
 * 208Pb
 * 0+
 * Trace
 * rowspan=2 style="text-indent:1em" | 212mPo
 * rowspan=2|
 * rowspan=2 colspan="3" style="text-indent:2em" | 2911(12) keV
 * rowspan=2|45.1(6) s
 * α (99.93%)
 * 208Pb
 * rowspan=2|(18+)
 * rowspan=2|
 * IT (.07%)
 * 212Po
 * 213Po
 * style="text-align:right" | 84
 * style="text-align:right" | 129
 * 212.992857(3)
 * 3.65(4) μs
 * α
 * 209Pb
 * 9/2+
 * Trace
 * 214Po
 * Radium C'
 * style="text-align:right" | 84
 * style="text-align:right" | 130
 * 213.9952014(16)
 * 164.3(20) μs
 * α
 * 210Pb
 * 0+
 * Trace
 * rowspan=2|215Po
 * rowspan=2|Actinium A
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 131
 * rowspan=2|214.9994200(27)
 * rowspan=2|1.781(4) ms
 * α (99.99%)
 * 211Pb
 * rowspan=2|9/2+
 * rowspan=2|Trace
 * β− (2.3×10−4%)
 * 215At
 * 216Po
 * Thorium A
 * style="text-align:right" | 84
 * style="text-align:right" | 132
 * 216.0019150(24)
 * 145(2) ms
 * α
 * 212Pb
 * 0+
 * Trace
 * rowspan=2|217Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 133
 * rowspan=2|217.006335(7)
 * rowspan=2|1.47(5) s
 * α (95%)
 * 213Pb
 * rowspan=2|5/2+#
 * rowspan=2|Trace
 * β− (5%)
 * 217At
 * rowspan=2|218Po
 * rowspan=2|Radium A
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 134
 * rowspan=2|218.0089730(26)
 * rowspan=2|3.10(1) min
 * α (99.98%)
 * 214Pb
 * rowspan=2|0+
 * rowspan=2|Trace
 * β− (.02%)
 * 218At
 * rowspan=2|219Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 135
 * rowspan=2|219.01361(16)
 * rowspan=2|10.3(1) min
 * α (28.2%)
 * 215Pb
 * rowspan=2|9/2+#
 * rowspan=2|
 * β− (71.8%)
 * 219At
 * 220Po
 * style="text-align:right" | 84
 * style="text-align:right" | 136
 * 220.0164(18)
 * 40# s [>300 ns]
 * β−
 * 220At
 * 0+
 * 221Po
 * style="text-align:right" | 84
 * style="text-align:right" | 137
 * 221.02123(20)
 * 2.2(0.7) min
 * β−
 * 221At
 * 9/2+#
 * 222Po
 * style="text-align:right" | 84
 * style="text-align:right" | 138
 * 222.024144(40)
 * 9.1(7.2) min
 * β−
 * 222At
 * 0+
 * 223Po
 * style="text-align:right" | 84
 * style="text-align:right" | 139
 * 223.02907(21)#
 * 6# s [>300 ns]
 * β−?
 * 223At
 * 11/2+#
 * 224Po
 * style="text-align:right" | 84
 * style="text-align:right" | 140
 * 224.03211(21)#
 * 3# min [>300 ns]
 * β−?
 * 224At
 * 0+
 * 225Po
 * style="text-align:right" | 84
 * style="text-align:right" | 141
 * 225.03712(32)#
 * 10# s [>300 ns]
 * β−?
 * 225At
 * 3/2+#
 * 226Po
 * style="text-align:right" | 84
 * style="text-align:right" | 142
 * 226.04031(43)#
 * 1# min [>300 ns]
 * β−?
 * 226At
 * 0+
 * 227Po
 * style="text-align:right" | 84
 * style="text-align:right" | 143
 * 227.04539(43)#
 * 2# s [>300 ns]
 * β−?
 * 227At
 * 5/2+#
 * colspan="3" style="text-indent:2em" | 4873.3(17) keV
 * 2.8(7) μs
 * (43/2+)
 * 212Po
 * Thorium C'
 * style="text-align:right" | 84
 * style="text-align:right" | 128
 * 211.9888680(13)
 * 294.4(8) ns
 * α
 * 208Pb
 * 0+
 * Trace
 * rowspan=2 style="text-indent:1em" | 212mPo
 * rowspan=2|
 * rowspan=2 colspan="3" style="text-indent:2em" | 2911(12) keV
 * rowspan=2|45.1(6) s
 * α (99.93%)
 * 208Pb
 * rowspan=2|(18+)
 * rowspan=2|
 * IT (.07%)
 * 212Po
 * 213Po
 * style="text-align:right" | 84
 * style="text-align:right" | 129
 * 212.992857(3)
 * 3.65(4) μs
 * α
 * 209Pb
 * 9/2+
 * Trace
 * 214Po
 * Radium C'
 * style="text-align:right" | 84
 * style="text-align:right" | 130
 * 213.9952014(16)
 * 164.3(20) μs
 * α
 * 210Pb
 * 0+
 * Trace
 * rowspan=2|215Po
 * rowspan=2|Actinium A
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 131
 * rowspan=2|214.9994200(27)
 * rowspan=2|1.781(4) ms
 * α (99.99%)
 * 211Pb
 * rowspan=2|9/2+
 * rowspan=2|Trace
 * β− (2.3×10−4%)
 * 215At
 * 216Po
 * Thorium A
 * style="text-align:right" | 84
 * style="text-align:right" | 132
 * 216.0019150(24)
 * 145(2) ms
 * α
 * 212Pb
 * 0+
 * Trace
 * rowspan=2|217Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 133
 * rowspan=2|217.006335(7)
 * rowspan=2|1.47(5) s
 * α (95%)
 * 213Pb
 * rowspan=2|5/2+#
 * rowspan=2|Trace
 * β− (5%)
 * 217At
 * rowspan=2|218Po
 * rowspan=2|Radium A
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 134
 * rowspan=2|218.0089730(26)
 * rowspan=2|3.10(1) min
 * α (99.98%)
 * 214Pb
 * rowspan=2|0+
 * rowspan=2|Trace
 * β− (.02%)
 * 218At
 * rowspan=2|219Po
 * rowspan=2|
 * rowspan=2 style="text-align:right" | 84
 * rowspan=2 style="text-align:right" | 135
 * rowspan=2|219.01361(16)
 * rowspan=2|10.3(1) min
 * α (28.2%)
 * 215Pb
 * rowspan=2|9/2+#
 * rowspan=2|
 * β− (71.8%)
 * 219At
 * 220Po
 * style="text-align:right" | 84
 * style="text-align:right" | 136
 * 220.0164(18)
 * 40# s [>300 ns]
 * β−
 * 220At
 * 0+
 * 221Po
 * style="text-align:right" | 84
 * style="text-align:right" | 137
 * 221.02123(20)
 * 2.2(0.7) min
 * β−
 * 221At
 * 9/2+#
 * 222Po
 * style="text-align:right" | 84
 * style="text-align:right" | 138
 * 222.024144(40)
 * 9.1(7.2) min
 * β−
 * 222At
 * 0+
 * 223Po
 * style="text-align:right" | 84
 * style="text-align:right" | 139
 * 223.02907(21)#
 * 6# s [>300 ns]
 * β−?
 * 223At
 * 11/2+#
 * 224Po
 * style="text-align:right" | 84
 * style="text-align:right" | 140
 * 224.03211(21)#
 * 3# min [>300 ns]
 * β−?
 * 224At
 * 0+
 * 225Po
 * style="text-align:right" | 84
 * style="text-align:right" | 141
 * 225.03712(32)#
 * 10# s [>300 ns]
 * β−?
 * 225At
 * 3/2+#
 * 226Po
 * style="text-align:right" | 84
 * style="text-align:right" | 142
 * 226.04031(43)#
 * 1# min [>300 ns]
 * β−?
 * 226At
 * 0+
 * 227Po
 * style="text-align:right" | 84
 * style="text-align:right" | 143
 * 227.04539(43)#
 * 2# s [>300 ns]
 * β−?
 * 227At
 * 5/2+#
 * style="text-align:right" | 84
 * style="text-align:right" | 140
 * 224.03211(21)#
 * 3# min [>300 ns]
 * β−?
 * 224At
 * 0+
 * 225Po
 * style="text-align:right" | 84
 * style="text-align:right" | 141
 * 225.03712(32)#
 * 10# s [>300 ns]
 * β−?
 * 225At
 * 3/2+#
 * 226Po
 * style="text-align:right" | 84
 * style="text-align:right" | 142
 * 226.04031(43)#
 * 1# min [>300 ns]
 * β−?
 * 226At
 * 0+
 * 227Po
 * style="text-align:right" | 84
 * style="text-align:right" | 143
 * 227.04539(43)#
 * 2# s [>300 ns]
 * β−?
 * 227At
 * 5/2+#
 * 227Po
 * style="text-align:right" | 84
 * style="text-align:right" | 143
 * 227.04539(43)#
 * 2# s [>300 ns]
 * β−?
 * 227At
 * 5/2+#
 * 227At
 * 5/2+#