釙有 42 個已知的同位素，都具有放射性，目前已觀測到的釙同位素質量數在 186 到 227 之間，其中有 9 個屬於痕量存在的天然放射性核素，當中以最為穩定。至於比更加穩定的和只能在迴旋加速器中人工轟擊而成。 圖表 188Po styletextalignright 84 styletextalignright 104 187999422 21 430 180 µs 040 2015 ms 0 189Po styletextalignright 84 styletextalignright 105 188998481 24 5 1 ms 32 rowspan2190Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 106 rowspan2189995101 14 rowspan2246 5 ms 999 186Pb rowspan20 rowspan2 1 190Bi rowspan2191Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 107 rowspan2190994574 12 rowspan222 1 ms 187Pb rowspan232 rowspan2 （不常見） 191Bi styletextindent1em 191mPo colspan3 styletextindent2em 130 21 keV 93 3 ms 132 rowspan2192Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 108 rowspan2191991335 13 rowspan2322 3 ms 99 188Pb rowspan20 rowspan2 1 192Bi styletextindent1em 192mPo colspan3 styletextindent2em 2600 500 keV 1 µs 12 rowspan2193Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 109 rowspan219299103 4 rowspan2420 40 ms 370 4640 ms 189Pb rowspan232 rowspan2 （不常見） 193Bi rowspan2 styletextindent1em 193mPo rowspan2 rowspan2 colspan3 styletextindent2em 100 30 keV rowspan2240 10 ms 243 1110 ms 189Pb rowspan2132 rowspan2 （不常見） 193Bi rowspan2194Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 110 rowspan2193988186 13 rowspan20392 4 s 190Pb rowspan20 rowspan2 （不常見） 194Bi styletextindent1em 194mPo colspan3 styletextindent2em 2525 2 keV 15 2 µs 11 rowspan2195Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 111 rowspan219498811 4 rowspan2464 9 s 75 191Pb rowspan232 rowspan2 25 195Bi rowspan3 styletextindent1em 195mPo rowspan3 rowspan3 colspan3 styletextindent2em 110 50 keV rowspan3192 2 s 90 191Pb rowspan3132 rowspan3 10 195Bi IT 01 195Po rowspan2196Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 112 rowspan2195985535 14 rowspan2556 12 s 94 192Pb rowspan20 rowspan2 6 196Bi styletextindent1em 196mPo colspan3 styletextindent2em 24905 17 keV 850 90 ns 11 rowspan2197Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 113 rowspan219698566 5 rowspan2536 10 s 54 197Bi rowspan232 rowspan2 44 193Pb rowspan3 styletextindent1em 197mPo rowspan3 rowspan3 colspan3 styletextindent2em 230 80 keV rowspan3258 1 s 84 193Pb rowspan3132 rowspan3 16 197Bi IT 01 197Po rowspan2198Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 114 rowspan2197983389 19 rowspan2177 3 min 57 194Pb rowspan20 rowspan2 43 198Bi styletextindent1em 198m1Po colspan3 styletextindent2em 256592 20 keV 200 20 ns 11 styletextindent1em 198m2Po colspan3 styletextindent2em 269186 20 keV 750 50 ns 12 rowspan2199Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 115 rowspan2198983666 25 rowspan2548 16 min 925 199Bi rowspan232 rowspan2 75 195Pb rowspan3 styletextindent1em 199mPo rowspan3 rowspan3 colspan3 styletextindent2em 3120 28 keV rowspan3417 4 min 735 199Bi rowspan3132 rowspan3 24 195Pb IT 25 199Po rowspan2200Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 116 rowspan2199981799 15 rowspan2115 1 min 888 200Bi rowspan20 rowspan2 111 196Pb rowspan2201Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 117 rowspan2200982260 6 rowspan2153 2 min 984 201Bi rowspan232 rowspan2 16 197Pb rowspan3 styletextindent1em 201mPo rowspan3 rowspan3 colspan3 styletextindent2em 4241 24 keV rowspan389 2 min IT 56 201Po rowspan3132 rowspan3 41 201Bi 29 197Pb rowspan2202Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 118 rowspan2201980758 16 rowspan2447 5 min 98 202Bi rowspan20 rowspan2 2 198Pb styletextindent1em 202mPo colspan3 styletextindent2em 26267 7 keV 200 ns 11 rowspan2203Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 119 rowspan2202981420 28 rowspan2367 5 min 9989 203Bi rowspan252 rowspan2 11 199Pb rowspan2 styletextindent1em 203m1Po rowspan2 rowspan2 colspan3 styletextindent2em 64149 17 keV rowspan245 2 s IT 9996 203Po rowspan2132 rowspan2 04 199Pb styletextindent1em 203m2Po colspan3 styletextindent2em 21585 6 keV 200 ns rowspan2204Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 120 rowspan2203980318 12 rowspan2353 2 h 9933 204Bi rowspan20 rowspan2 66 200Pb rowspan2205Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 121 rowspan2204981203 21 rowspan2166 2 h 9996 205Bi rowspan252 rowspan2 04 201Pb styletextindent1em 205m1Po colspan3 styletextindent2em 143166 17 keV 310 60 ns 12 styletextindent1em 205m2Po colspan3 styletextindent2em 88030 4 keV 645 µs 132 styletextindent1em 205m3Po colspan3 styletextindent2em 146121 21 keV 574 9 ms IT 205Po 192 styletextindent1em 205m4Po colspan3 styletextindent2em 30872 4 keV 115 10 ns 292 rowspan2206Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 122 rowspan2205980481 9 rowspan288 1 d 9455 206Bi rowspan20 rowspan2 545 202Pb styletextindent1em 206m1Po colspan3 styletextindent2em 158585 11 keV 222 10 ns 8 styletextindent1em 206m2Po colspan3 styletextindent2em 226222 14 keV 105 6 µs 9 rowspan2207Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 123 rowspan2206981593 7 rowspan2580 2 h 9997 207Bi rowspan252 rowspan2 021 203Pb styletextindent1em 207m1Po colspan3 styletextindent2em 68573 14 keV 205 10 ns 12 styletextindent1em 207m2Po colspan3 styletextindent2em 1115073 16 keV 49 4 µs 132 styletextindent1em 207m3Po colspan3 styletextindent2em 138315 6 keV 279 8 s IT 207Po 192 rowspan2208Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 124 rowspan22079812457 19 rowspan22898 2 y 9999 204Pb rowspan20 rowspan2 00277 208Bi rowspan2209Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 125 rowspan22089824304 20 rowspan2124 3 y 99546 205Pb rowspan212 rowspan2 0454 209Bi 210Po Radium F styletextalignright 84 styletextalignright 126 2099828737 13 138376 2 d 206Pb 0 痕量 238U 的衰變產物 styletextindent1em 210mPo colspan3 styletextindent2em 505761 4 keV 263 5 ns 16 211Po Actinium C styletextalignright 84 styletextalignright 127 2109866532 14 0516 3 s 207Pb 92 痕量 235U 的衰變產物 rowspan2 styletextindent1em 211m1Po rowspan2 rowspan2 colspan3 styletextindent2em 1462 5 keV rowspan2252 6 s 9998 207Pb rowspan2252 rowspan2 IT 016 211Po styletextindent1em 211m2Po colspan3 styletextindent2em 21357 9 keV 243 21 ns 312 styletextindent1em 211m3Po colspan3 styletextindent2em 48733 17 keV 28 7 µs 432 212Po Thorium C styletextalignright 84 styletextalignright 128 2119888680 13 299 2 ns 208Pb 0 痕量 232Th 的衰變產物 rowspan2 styletextindent1em 212mPo rowspan2 rowspan2 colspan3 styletextindent2em 2911 12 keV rowspan2451 6 s 9993 208Pb rowspan218 rowspan2 IT 07 212Po 213Po styletextalignright 84 styletextalignright 129 212992857 3 365 4 µs 209Pb 92 痕量 237Np 的衰變產物 214Po Radium C styletextalignright 84 styletextalignright 130 2139952014 16 1643 20 µs 210Pb 0 痕量 rowspan2215Po rowspan2Actinium A rowspan2 styletextalignright 84 rowspan2 styletextalignright 131 rowspan22149994200 27 rowspan21781 4 ms 9999 211Pb rowspan292 rowspan2 痕量 23104 215At 216Po Thorium A styletextalignright 84 styletextalignright 132 2160019150 24 0145 2 s 212Pb 0 痕量 rowspan2217Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 133 rowspan2217006335 7 rowspan2147 5 s 95 213Pb rowspan252 rowspan2 5 217At rowspan2218Po rowspan2Radium A rowspan2 styletextalignright 84 rowspan2 styletextalignright 134 rowspan22180089730 26 rowspan2310 1 min 9998 214Pb rowspan20 rowspan2 痕量 02 218At rowspan2219Po rowspan2 rowspan2 styletextalignright 84 rowspan2 styletextalignright 135 rowspan221901361 16 rowspan2103 1 min α 282 215Pb rowspan292 rowspan2 β 718 219At 220Po styletextalignright 84 styletextalignright 136 2200164 18 40 s 300 ns β 220At 0 221Po styletextalignright 84 styletextalignright 137 22102123 20 22 07 min β 221At 92 222Po styletextalignright 84 styletextalignright 138 222024144 40 91 72 min β 222At 0 參考文獻 Isotope masses from Ame2003 Atomic Mass Evaluation by G Audi AH Wapstra C Thibault J Blachot and O Bersillon in Nuclear Physics A729 2003 Halflife spin and isomer data selected from these sources Editing notes on this articles talk page Audi Bersillon Blachot Wapstra The Nubase2003 evaluation of nuclear and decay properties Nuc Phys A 729 pp 3128 2003 National Nuclear Data Center Brookhaven National Laboratory Information extracted from the NuDat 21 database retrieved Sept 2005 David R Lide ed Norman E Holden in CRC Handbook of Chemistry and Physics 85th Edition online version CRC Press Boca Raton Florida 2005 Section 11 Table of the Isotopes Po Category 釙