釙的同位素

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，當中以釙最為穩定。至於比釙更加穩定的釙和釙只能在回旋加速器中人工轟擊而成。

## 圖表

188Po

187.999422(21)

430(180) µs0.40(+20−15) ms

0+

189Po

188.998481(24)

5(1) ms

3/2−#

α (99.9%)

186Pb

β+ (.1%)

190Bi

α

187Pb

β+ （不常見）

191Bi

191mPo

130(21) keV

93(3) ms

(13/2+)

α (99%)

188Pb

β+ (1%)

192Bi

192mPo

2600(500)# keV

~1 µs

12+#

α

189Pb

β+ （不常見）

193Bi

α

189Pb

β+ （不常見）

193Bi

α

190Pb

β+ （不常見）

194Bi

194mPo

2525(2) keV

15(2) µs

(11−)

α (75%)

191Pb

β+ (25%)

195Bi

α (90%)

191Pb

β+ (10%)

195Bi

IT (.01%)

195Po

α (94%)

192Pb

β+ (6%)

196Bi

196mPo

2490.5(17) keV

850(90) ns

(11−)

β+ (54%)

197Bi

α (44%)

193Pb

α (84%)

193Pb

β+ (16%)

197Bi

IT (.01%)

197Po

α (57%)

194Pb

β+ (43%)

198Bi

198m1Po

2565.92(20) keV

200(20) ns

11−

198m2Po

2691.86(20) keV

750(50) ns

12+

β+ (92.5%)

199Bi

α (7.5%)

195Pb

β+ (73.5%)

199Bi

α (24%)

195Pb

IT (2.5%)

199Po

β+ (88.8%)

200Bi

α (11.1%)

196Pb

β+ (98.4%)

201Bi

α (1.6%)

197Pb

IT (56%)

201Po

EC (41%)

201Bi

α (2.9%)

197Pb

β+ (98%)

202Bi

α (2%)

198Pb

202mPo

2626.7(7) keV

>200 ns

11−

β+ (99.89%)

203Bi

α (.11%)

199Pb

IT (99.96%)

203Po

α (.04%)

199Pb

203m2Po

2158.5(6) keV

>200 ns

β+ (99.33%)

204Bi

α (.66%)

200Pb

β+ (99.96%)

205Bi

α (.04%)

201Pb

205m1Po

143.166(17) keV

310(60) ns

1/2−

205m2Po

880.30(4) keV

645 µs

13/2+

205m3Po

1461.21(21) keV

57.4(9) ms

IT

205Po

19/2−

205m4Po

3087.2(4) keV

115(10) ns

29/2−

β+ (94.55%)

206Bi

α (5.45%)

202Pb

206m1Po

1585.85(11) keV

222(10) ns

(8+)#

206m2Po

2262.22(14) keV

1.05(6) µs

(9−)#

β+ (99.97%)

207Bi

α (.021%)

203Pb

207m1Po

68.573(14) keV

205(10) ns

1/2−

207m2Po

1115.073(16) keV

49(4) µs

13/2+

207m3Po

1383.15(6) keV

2.79(8) s

IT

207Po

19/2−

α (99.99%)

204Pb

β+ (.00277%)

208Bi

α (99.546%)

205Pb

β+ (0.454%)

209Bi

210Po

Radium F

209.9828737(13)

138.376(2) d

α

206Pb

0+

痕量

210mPo

5057.61(4) keV

263(5) ns

16+

211Po

Actinium C'

210.9866532(14)

0.516(3) s

α

207Pb

9/2+

痕量

α (99.98%)

207Pb

IT (.016%)

211Po

211m2Po

2135.7(9) keV

243(21) ns

(31/2−)

211m3Po

4873.3(17) keV

2.8(7) µs

(43/2+)

212Po

Thorium C'

211.9888680(13)

299(2) ns

α

208Pb

0+

痕量

α (99.93%)

208Pb

IT (.07%)

212Po

213Po

212.992857(3)

3.65(4) µs

α

209Pb

9/2+

痕量

214Po

Radium C'

213.9952014(16)

164.3(20) µs

α

210Pb

0+

痕量

α (99.99%)

211Pb

β- (2.3×10−4%)

215At

216Po

Thorium A

216.0019150(24)

0.145(2) s

α

212Pb

0+

痕量

α (95%)

213Pb

β- (5%)

217At

α (99.98%)

214Pb

β- (.02%)

218At

α (28.2%)

215Pb

β− (71.8%)

219At

220Po

220.0164(18)

40# s>300 ns

β−

220At

0+

221Po

221.02123(20)

2.2(0.7) min

β−

221At

9/2+#

222Po

222.024144(40)

9.1(7.2) min

β−

222At

0+

## 參考文獻

- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties , Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 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.

## 基本資料

- infobox_name：polonium
- 貨幣符號：Po
- 日語原文：釙