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Isotopes of polonium
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<h2 id="list-of-isotopes">List of isotopes</h2> <table><tbody><tr><th rowspan="2">Nuclide<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a></th><th rowspan="2">Historicname</th><th rowspan="1"><a href="/facts/Atomic_number/bgAr581S"><i>Z</i></a></th><th rowspan="1"><a href="/facts/Neutron_number/eNtwGnVL"><i>N</i></a></th><th rowspan="1"><a href="/facts/Atomic_mass/J1FJY9MV">Isotopic mass</a> (<a href="/facts/Dalton_(unit)/IMATU3vf">Da</a>)<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a><a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a></th><th rowspan="2"><a href="/facts/Half-life/kGVH8BAB">Half-life</a></th><th rowspan="2"><a href="/facts/Decay_mode/Ya6FVjt4">Decaymode</a></th><th rowspan="2"><a href="/facts/Decay_product/hT0obfLv">Daughterisotope</a><a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a><a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a></th><th rowspan="2"><a href="/facts/Spin_(particle_physics)/4Jvp7e8P">Spin</a> and<a href="/facts/Parity_(physics)/emSbJ4hD">parity</a><a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a><a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a></th><th rowspan="2"><a href="/facts/Natural_abundance/dGjaAwc9">Isotopicabundance</a></th></tr><tr><th colspan="3">Excitation energy<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a></th></tr><tr><td>186Po</td><td></td><td>84</td><td>102</td><td>186.004403(20)</td><td>28+16−6 μs</td><td><a href="/facts/Alpha_decay/rCsHNIUE">α</a></td><td>182Pb</td><td>0+</td><td></td></tr><tr><td>187Po</td><td></td><td>84</td><td>103</td><td>187.003030(40)</td><td>1.40(25) ms</td><td>α</td><td>183Pb</td><td>1/2−, 5/2−</td><td></td></tr><tr><td>187mPo</td><td></td><td colspan="3">4(27) keV</td><td>0.5 ms</td><td>α</td><td>183Pb</td><td>13/2+#</td><td></td></tr><tr><td>188Po</td><td></td><td>84</td><td>104</td><td>187.999416(21)</td><td>270(30) μs</td><td>α</td><td>184Pb</td><td>0+</td><td></td></tr><tr><td>189Po</td><td></td><td>84</td><td>105</td><td>188.998473(24)</td><td>3.5(5) ms</td><td>α</td><td>185Pb</td><td>(5/2−)</td><td></td></tr><tr><td>190Po</td><td></td><td>84</td><td>106</td><td>189.995102(14)</td><td>2.45(5) ms</td><td>α</td><td>186Pb</td><td>0+</td><td></td></tr><tr><td>191Po</td><td></td><td>84</td><td>107</td><td>190.994558(8)</td><td>22(1) ms</td><td>α</td><td>187Pb</td><td>3/2−</td><td></td></tr><tr><td>191mPo</td><td></td><td colspan="3">61(11) keV</td><td>93(3) ms</td><td>α</td><td>187mPb</td><td>13/2+</td><td></td></tr><tr><td>192Po</td><td></td><td>84</td><td>108</td><td>191.991340(11)</td><td>32.2(3) ms</td><td>α</td><td>188Pb</td><td>0+</td><td></td></tr><tr><td>192mPo</td><td></td><td colspan="3">2294.6(10) keV</td><td>580(100) ns</td><td><a href="/facts/Isomeric_transition/L8DHcqnk">IT</a></td><td>192Po</td><td>11−</td><td></td></tr><tr><td>193Po</td><td></td><td>84</td><td>109</td><td>192.991062(16)</td><td>399(34) ms</td><td>α</td><td>189Pb</td><td>3/2−</td><td></td></tr><tr><td>193mPo</td><td></td><td colspan="3">100(6) keV</td><td>245(11) ms</td><td>α</td><td>189mPb</td><td>13/2+</td><td></td></tr><tr><td>194Po</td><td></td><td>84</td><td>110</td><td>193.988186(14)</td><td>392(4) ms</td><td>α</td><td>190Pb</td><td>0+</td><td></td></tr><tr><td>194mPo</td><td></td><td colspan="3">2313.4(3) keV</td><td>12.9(5) μs</td><td>IT</td><td>194Po</td><td>(10−)</td><td></td></tr><tr><td rowspan="2">195Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">111</td><td rowspan="2">194.988066(6)</td><td rowspan="2">4.64(9) s</td><td>α (94%)</td><td>191Pb</td><td rowspan="2">3/2−</td><td rowspan="2"></td></tr><tr><td>β+?</td><td>195Bi</td></tr><tr><td>195mPo</td><td></td><td colspan="3">148(9) keV</td><td>1.92(2) s</td><td>α</td><td>191mPb</td><td>13/2+</td><td></td></tr><tr><td rowspan="2">196Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">112</td><td rowspan="2">195.985541(6)</td><td rowspan="2">5.56(12) s</td><td>α (94%)</td><td>192Pb</td><td rowspan="2">0+</td><td rowspan="2"></td></tr><tr><td>β+?</td><td>196Bi</td></tr><tr><td>196mPo</td><td></td><td colspan="3">2493.9(4) keV</td><td>856(17) ns</td><td>IT</td><td>196Po</td><td>11−</td><td></td></tr><tr><td rowspan="2">197Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">113</td><td rowspan="2">196.985622(11)</td><td rowspan="2">53.6(9) s</td><td>β+?</td><td>197Bi</td><td rowspan="2">(3/2−)</td><td rowspan="2"></td></tr><tr><td>α (44%)</td><td>193Pb</td></tr><tr><td rowspan="3">197mPo</td><td rowspan="3"></td><td rowspan="3" colspan="3">196(12)# keV</td><td rowspan="3">25.8(1) s</td><td>α (84%)</td><td>193mPb</td><td rowspan="3">13/2+</td><td rowspan="3"></td></tr><tr><td>β+?</td><td>197Bi</td></tr><tr><td>IT?</td><td>197Po</td></tr><tr><td rowspan="2">198Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">114</td><td rowspan="2">197.983389(19)</td><td rowspan="2">1.760(24) min</td><td>α (57%)</td><td>194Pb</td><td rowspan="2">0+</td><td rowspan="2"></td></tr><tr><td>β+ (43%)</td><td>198Bi</td></tr><tr><td>198m1Po</td><td></td><td colspan="3">2565.92(20) keV</td><td>200(20) ns</td><td>IT</td><td>198Po</td><td>11−</td><td></td></tr><tr><td>198m2Po</td><td></td><td colspan="3">2740(50)# keV</td><td>750(50) ns</td><td>IT</td><td>198Po</td><td>12+</td><td></td></tr><tr><td rowspan="2">199Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">115</td><td rowspan="2">198.983666(25)</td><td rowspan="2">5.48(16) min</td><td>β+ (92.5%)</td><td>199Bi</td><td rowspan="2">(3/2−)</td><td rowspan="2"></td></tr><tr><td>α (7.5%)</td><td>195Pb</td></tr><tr><td rowspan="3">199mPo</td><td rowspan="3"></td><td rowspan="3" colspan="3">312.0(28) keV</td><td rowspan="3">4.17(4) min</td><td>β+ (73.5%)</td><td>199Bi</td><td rowspan="3">13/2+</td><td rowspan="3"></td></tr><tr><td>α (24%)</td><td>195Pb</td></tr><tr><td>IT (2.5%)</td><td>199Po</td></tr><tr><td rowspan="2">200Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">116</td><td rowspan="2">199.981799(15)</td><td rowspan="2">11.5(1) min</td><td>β+ (88.8%)</td><td>200Bi</td><td rowspan="2">0+</td><td rowspan="2"></td></tr><tr><td>α (11.1%)</td><td>196Pb</td></tr><tr><td rowspan="2">201Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">117</td><td rowspan="2">200.982260(6)</td><td rowspan="2">15.3(2) min</td><td>β+ (98.4%)</td><td>201Bi</td><td rowspan="2">3/2−</td><td rowspan="2"></td></tr><tr><td>α (1.6%)</td><td>197Pb</td></tr><tr><td rowspan="3">201mPo</td><td rowspan="3"></td><td rowspan="3" colspan="3">424.1(24) keV</td><td rowspan="3">8.9(2) min</td><td>IT (56.2(12)%)</td><td>201Po</td><td rowspan="3">13/2+</td><td rowspan="3"></td></tr><tr><td>β+ (41.4(7)%)</td><td>201Bi</td></tr><tr><td>α (2.4(5)%)</td><td>197Pb</td></tr><tr><td rowspan="2">202Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">118</td><td rowspan="2">201.980758(16)</td><td rowspan="2">44.7(5) min</td><td>β+ (98%)</td><td>202Bi</td><td rowspan="2">0+</td><td rowspan="2"></td></tr><tr><td>α (2%)</td><td>198Pb</td></tr><tr><td>202mPo</td><td></td><td colspan="3">2626.7(7) keV</td><td>>200 ns</td><td></td><td></td><td>11−</td><td></td></tr><tr><td rowspan="2">203Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">119</td><td rowspan="2">202.981420(28)</td><td rowspan="2">36.7(5) min</td><td>β+ (99.89%)</td><td>203Bi</td><td rowspan="2">5/2−</td><td rowspan="2"></td></tr><tr><td>α (.11%)</td><td>199Pb</td></tr><tr><td rowspan="2">203m1Po</td><td rowspan="2"></td><td rowspan="2" colspan="3">641.49(17) keV</td><td rowspan="2">45(2) s</td><td>IT (99.96%)</td><td>203Po</td><td rowspan="2">13/2+</td><td rowspan="2"></td></tr><tr><td>α (.04%)</td><td>199Pb</td></tr><tr><td>203m2Po</td><td></td><td colspan="3">2158.5(6) keV</td><td>>200 ns</td><td></td><td></td><td></td><td></td></tr><tr><td rowspan="2">204Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">120</td><td rowspan="2">203.980318(12)</td><td rowspan="2">3.53(2) h</td><td>β+ (99.33%)</td><td>204Bi</td><td rowspan="2">0+</td><td rowspan="2"></td></tr><tr><td>α (.66%)</td><td>200Pb</td></tr><tr><td rowspan="2">205Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">121</td><td rowspan="2">204.981203(21)</td><td rowspan="2">1.66(2) h</td><td>β+ (99.96%)</td><td>205Bi</td><td rowspan="2">5/2−</td><td rowspan="2"></td></tr><tr><td>α (.04%)</td><td>201Pb</td></tr><tr><td>205m1Po</td><td></td><td colspan="3">143.166(17) keV</td><td>310(60) ns</td><td></td><td></td><td>1/2−</td><td></td></tr><tr><td>205m2Po</td><td></td><td colspan="3">880.30(4) keV</td><td>645 μs</td><td></td><td></td><td>13/2+</td><td></td></tr><tr><td>205m3Po</td><td></td><td colspan="3">1461.21(21) keV</td><td>57.4(9) ms</td><td>IT</td><td>205Po</td><td>19/2−</td><td></td></tr><tr><td>205m4Po</td><td></td><td colspan="3">3087.2(4) keV</td><td>115(10) ns</td><td></td><td></td><td>29/2−</td><td></td></tr><tr><td rowspan="2">206Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">122</td><td rowspan="2">205.980481(9)</td><td rowspan="2">8.8(1) d</td><td>β+ (94.55%)</td><td>206Bi</td><td rowspan="2">0+</td><td rowspan="2"></td></tr><tr><td>α (5.45%)</td><td>202Pb</td></tr><tr><td>206m1Po</td><td></td><td colspan="3">1585.85(11) keV</td><td>222(10) ns</td><td></td><td></td><td>(8+)#</td><td></td></tr><tr><td>206m2Po</td><td></td><td colspan="3">2262.22(14) keV</td><td>1.05(6) μs</td><td></td><td></td><td>(9−)#</td><td></td></tr><tr><td rowspan="2">207Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">123</td><td rowspan="2">206.981593(7)</td><td rowspan="2">5.80(2) h</td><td>β+ (99.97%)</td><td>207Bi</td><td rowspan="2">5/2−</td><td rowspan="2"></td></tr><tr><td>α (.021%)</td><td>203Pb</td></tr><tr><td>207m1Po</td><td></td><td colspan="3">68.573(14) keV</td><td>205(10) ns</td><td></td><td></td><td>1/2−</td><td></td></tr><tr><td>207m2Po</td><td></td><td colspan="3">1115.073(16) keV</td><td>49(4) μs</td><td></td><td></td><td>13/2+</td><td></td></tr><tr><td>207m3Po</td><td></td><td colspan="3">1383.15(6) keV</td><td>2.79(8) s</td><td>IT</td><td>207Po</td><td>19/2−</td><td></td></tr><tr><td rowspan="2">208Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">124</td><td rowspan="2">207.9812457(19)</td><td rowspan="2">2.898(2) y</td><td>α (99.99%)</td><td>204Pb</td><td rowspan="2">0+</td><td rowspan="2"></td></tr><tr><td>β+ (.00277%)</td><td>208Bi</td></tr><tr><td rowspan="2">209Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">125</td><td rowspan="2">208.9824304(20)</td><td rowspan="2">124(3) y</td><td>α (99.546%)</td><td>205Pb</td><td rowspan="2">1/2−</td><td rowspan="2"></td></tr><tr><td>β+ (.454%)</td><td><i>209Bi</i></td></tr><tr><td><a href="/facts/Polonium-210/8DnmI5Lg">210Po</a><a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></td><td>Radium F</td><td>84</td><td>126</td><td>209.9828737(13)</td><td>138.376(2) d</td><td>α</td><td>206Pb</td><td>0+</td><td>Trace<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a></td></tr><tr><td>210mPo</td><td></td><td colspan="3">5057.61(4) keV</td><td>263(5) ns</td><td></td><td></td><td>16+</td><td></td></tr><tr><td>211Po</td><td>Actinium C'</td><td>84</td><td>127</td><td>210.9866532(14)</td><td>516(3) ms</td><td>α</td><td>207Pb</td><td>9/2+</td><td>Trace<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a></td></tr><tr><td rowspan="2">211m1Po</td><td rowspan="2"></td><td rowspan="2" colspan="3">1462(5) keV</td><td rowspan="2">25.2(6) s</td><td>α (99.98%)</td><td>207Pb</td><td rowspan="2">(25/2+)</td><td rowspan="2"></td></tr><tr><td>IT (.016%)</td><td>211Po</td></tr><tr><td>211m2Po</td><td></td><td colspan="3">2135.7(9) keV</td><td>243(21) ns</td><td></td><td></td><td>(31/2−)</td><td></td></tr><tr><td>211m3Po</td><td></td><td colspan="3">4873.3(17) keV</td><td>2.8(7) μs</td><td></td><td></td><td>(43/2+)</td><td></td></tr><tr><td>212Po</td><td>Thorium C'</td><td>84</td><td>128</td><td>211.9888680(13)</td><td>294.4(8) ns<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a></td><td>α</td><td>208Pb</td><td>0+</td><td>Trace<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a></td></tr><tr><td rowspan="2">212mPo</td><td rowspan="2"></td><td rowspan="2" colspan="3">2911(12) keV</td><td rowspan="2">45.1(6) s</td><td>α (99.93%)</td><td>208Pb</td><td rowspan="2">(18+)</td><td rowspan="2"></td></tr><tr><td>IT (.07%)<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a><a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a></td><td>212Po</td></tr><tr><td>213Po</td><td></td><td>84</td><td>129</td><td>212.992857(3)</td><td>3.65(4) μs</td><td>α</td><td>209Pb</td><td>9/2+</td><td>Trace<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a></td></tr><tr><td>214Po</td><td>Radium C'</td><td>84</td><td>130</td><td>213.9952014(16)</td><td>164.3(20) μs</td><td>α</td><td>210Pb</td><td>0+</td><td>Trace<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a></td></tr><tr><td rowspan="2">215Po</td><td rowspan="2">Actinium A</td><td rowspan="2">84</td><td rowspan="2">131</td><td rowspan="2">214.9994200(27)</td><td rowspan="2">1.781(4) ms</td><td>α</td><td>211Pb</td><td rowspan="2">9/2+</td><td rowspan="2">Trace<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a></td></tr><tr><td>β− (2.3×10−4%)</td><td>215At</td></tr><tr><td>216Po</td><td>Thorium A</td><td>84</td><td>132</td><td>216.0019150(24)</td><td>145(2) ms</td><td>α<a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a></td><td>212Pb</td><td>0+</td><td>Trace<a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a></td></tr><tr><td rowspan="2">217Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">133</td><td rowspan="2">217.006335(7)</td><td rowspan="2">1.47(5) s</td><td>α (95%)</td><td>213Pb</td><td rowspan="2">5/2+#</td><td rowspan="2">Trace<a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a></td></tr><tr><td>β− (5%)</td><td>217At</td></tr><tr><td rowspan="2">218Po</td><td rowspan="2">Radium A</td><td rowspan="2">84</td><td rowspan="2">134</td><td rowspan="2">218.0089730(26)</td><td rowspan="2">3.10(1) min</td><td>α (99.98%)</td><td>214Pb</td><td rowspan="2">0+</td><td rowspan="2">Trace<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a></td></tr><tr><td>β− (.02%)</td><td>218At</td></tr><tr><td rowspan="2">219Po</td><td rowspan="2"></td><td rowspan="2">84</td><td rowspan="2">135</td><td rowspan="2">219.01361(16)</td><td rowspan="2">10.3(1) min</td><td>β− (71.8%)</td><td>219At</td><td rowspan="2">9/2+#</td><td rowspan="2"></td></tr><tr><td>α (28.2%)</td><td>215Pb</td></tr><tr><td>220Po</td><td></td><td>84</td><td>136</td><td>220.0164(18)</td><td>40# s[>300 ns]</td><td>β−</td><td>220At</td><td>0+</td><td></td></tr><tr><td>221Po</td><td></td><td>84</td><td>137</td><td>221.02123(20)</td><td>2.2(0.7) min</td><td>β−</td><td>221At</td><td>9/2+#</td><td></td></tr><tr><td>222Po</td><td></td><td>84</td><td>138</td><td>222.024144(40)</td><td>9.1(7.2) min</td><td>β−</td><td>222At</td><td>0+</td><td></td></tr><tr><td>223Po</td><td></td><td>84</td><td>139</td><td>223.02907(21)#</td><td>6# s[>300 ns]</td><td>β−?</td><td>223At</td><td>11/2+#</td><td></td></tr><tr><td>224Po</td><td></td><td>84</td><td>140</td><td>224.03211(21)#</td><td>3# min[>300 ns]</td><td>β−?</td><td>224At</td><td>0+</td><td></td></tr><tr><td>225Po</td><td></td><td>84</td><td>141</td><td>225.03712(32)#</td><td>10# s[>300 ns]</td><td>β−?</td><td>225At</td><td>3/2+#</td><td></td></tr><tr><td>226Po</td><td></td><td>84</td><td>142</td><td>226.04031(43)#</td><td>1# min[>300 ns]</td><td>β−?</td><td>226At</td><td>0+</td><td></td></tr><tr><td>227Po</td><td></td><td>84</td><td>143</td><td>227.04539(43)#</td><td>2# s[>300 ns]</td><td>β−?</td><td>227At</td><td>5/2+#</td><td></td></tr><tr><th colspan="20"><i>This table header & footer:</i> <ul><li>view</li></ul></th></tr></tbody></table> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Poisoning_of_Alexander_Litvinenko/uc3JQDrE">Poisoning of Alexander Litvinenko</a> (with 210Po)</li></ul> <p>Daughter products other than polonium </p> <ul><li><a href="/facts/Isotopes_of_astatine/vtgd2Cvy">Isotopes of astatine</a></li> <li><a href="/facts/Isotopes_of_bismuth/DrbTkEzW">Isotopes of bismuth</a></li> <li><a href="/facts/Isotopes_of_lead/V9JFUTRo">Isotopes of lead</a></li></ul> General references <p>Isotope data is sourced in: </p> <ul><li>Isotopic mass, spin and parity</li></ul> Audi, Georges; Bersillon, Olivier; Blachot, Jean; <a href="/facts/Aaldert_Wapstra/9Ylvt18s">Wapstra, Aaldert Hendrik</a> (2003), <a href="https://hal.archives-ouvertes.fr/in2p3-00020241/document">"The NUBASE evaluation of nuclear and decay properties"</a>, <i>Nuclear Physics A</i>, 729: 3–128, <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2003NuPhA.729....3A">2003NuPhA.729....3A</a>, <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2Fj.nuclphysa.2003.11.001">10.1016/j.nuclphysa.2003.11.001</a> Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.). <i><a href="/facts/CRC_Handbook_of_Chemistry_and_Physics/qjxzC2Cu">CRC Handbook of Chemistry and Physics</a></i> (85th ed.). <a href="/facts/Boca_Raton%2c_Florida/9gcNen3S">Boca Raton, Florida</a>: <a href="/facts/CRC_Press/duTuH4hz">CRC Press</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-8493-0485-9. <a href="/facts/National_Nuclear_Data_Center/SgVzvxLk">National Nuclear Data Center</a>. <a href="http://www.nndc.bnl.gov/nudat3/">"NuDat 3.0 database"</a>. <a href="/facts/Brookhaven_National_Laboratory/L2JrG0K1">Brookhaven National Laboratory</a>. <ul><li>Half-life</li></ul> Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). <a href="https://www-nds.iaea.org/amdc/ame2016/NUBASE2016.pdf">"The NUBASE2016 evaluation of nuclear properties"</a> (PDF). <i>Chinese Physics C</i>. 41 (3): 030001. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2017ChPhC..41c0001A">2017ChPhC..41c0001A</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1088%2F1674-1137%2F41%2F3%2F030001">10.1088/1674-1137/41/3/030001</a>. <a href="/facts/National_Nuclear_Data_Center/SgVzvxLk">National Nuclear Data Center</a>. <a href="http://www.nndc.bnl.gov/nudat3/">"NuDat 3.0 database"</a>. <a href="/facts/Brookhaven_National_Laboratory/L2JrG0K1">Brookhaven National Laboratory</a>. Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.). <i><a href="/facts/CRC_Handbook_of_Chemistry_and_Physics/qjxzC2Cu">CRC Handbook of Chemistry and Physics</a></i> (85th ed.). <a href="/facts/Boca_Raton%2c_Florida/9gcNen3S">Boca Raton, Florida</a>: <a href="/facts/CRC_Press/duTuH4hz">CRC Press</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-8493-0485-9. <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Carvalho, F.; Fernandes, S.; Fesenko, S.; Holm, E.; Howard, B.; Martin, P.; Phaneuf, P.; Porcelli, D.; Pröhl, G.; Twining, J. (2017). The Environmental Behaviour of Polonium. Technical reports series. Vol. 484. Vienna: International Atomic Energy Agency. p. 22. ISBN 978-92-0-112116-5. ISSN 0074-1914. <a href="978-92-0-112116-5" target="_blank">978-92-0-112116-5</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>mPo – Excited nuclear isomer. <a href="/wiki/Nuclear_isomer" target="_blank">/wiki/Nuclear_isomer</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits. <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p># – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS). <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Bold italics symbol as daughter – Daughter product is nearly stable. <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Bold symbol as daughter – Daughter product is stable. <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>( ) spin value – Indicates spin with weak assignment arguments. <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p># – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN). <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p># – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN). <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Most common isotope <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>Intermediate decay product of 238U <a href="/wiki/Decay_product" target="_blank">/wiki/Decay_product</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>Intermediate decay product of 235U <a href="/wiki/Uranium-235" target="_blank">/wiki/Uranium-235</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae. <a href="https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf" target="_blank">https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>Intermediate decay product of 232Th <a href="/wiki/Thorium-232" target="_blank">/wiki/Thorium-232</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001 <a href="/wiki/Aaldert_Wapstra" target="_blank">/wiki/Aaldert_Wapstra</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>"Adopted Levels for 212Po". NNDC Chart of Nuclides. <a href="https://www.nndc.bnl.gov/nudat3/getdataset.jsp?nucleus=212Po&unc=NDS" target="_blank">https://www.nndc.bnl.gov/nudat3/getdataset.jsp?nucleus=212Po&unc=NDS</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>Intermediate decay product of 237Np <a href="/wiki/Neptunium-237" target="_blank">/wiki/Neptunium-237</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>Intermediate decay product of 238U <a href="/wiki/Decay_product" target="_blank">/wiki/Decay_product</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> <li id="fn:19"><p>Intermediate decay product of 235U <a href="/wiki/Uranium-235" target="_blank">/wiki/Uranium-235</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></p></li> <li id="fn:20"><p>Theoretically capable of β−β− decay to 216Rn[1] <a href="#fnref:20" class="footnote-back-ref">↩</a></p></li> <li id="fn:21"><p>Intermediate decay product of 232Th <a href="/wiki/Thorium-232" target="_blank">/wiki/Thorium-232</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></p></li> <li id="fn:22"><p>Intermediate decay product of 237Np <a href="/wiki/Neptunium-237" target="_blank">/wiki/Neptunium-237</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></p></li> <li id="fn:23"><p>Intermediate decay product of 238U <a href="/wiki/Decay_product" target="_blank">/wiki/Decay_product</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></p></li> </ol>