钽的同位素

钽（原子质量单位：180.94788(2)）的同位素，有1个是稳定的，另一个钽为天然存在的核异构体，理论上不稳定，但是半衰期只有下界。

## 图表

Ta

154.97459(54)#

13(4) µs12(+4−3) µs

(11/2−)

β+ (95.8%)

156Hf

p (4.2%)

155Hf

0.36(4) s

p

155Hf

9+

α (91%)

153Lu

β+ (9%)

157Hf

4.3(1) ms

11/2−

1.7(1) ms

α

153Lu

(25/2−)

α (96%)

154Lu

β+ (4%)

158Hf

α (93%)

154Lu

IT

158Ta

β+

158Hf

β+ (66%)

159Hf

α (34%)

155Lu

α (56%)

155Lu

β+ (44%)

159Hf

α

156Lu

β+

160Hf

β+ (66%)

160Hf

α (34%)

156Lu

β+ (95%)

161Hf

α (5%)

157Lu

2.89(12) s

11/2−#

β+ (99.92%)

162Hf

α (.073%)

158Lu

β+ (99.8%)

163Hf

α (.2%)

159Lu

Ta

163.95353(3)

14.2(3) s

β+

164Hf

(3+)

Ta

164.950773(19)

31.0(15) s

β+

165Hf

5/2−#

9/2−#

Ta

165.95051(3)

34.4(5) s

β+

166Hf

(2)+

Ta

166.94809(3)

1.33(7) min

β+

167Hf

(3/2+)

Ta

167.94805(3)

2.0(1) min

β+

168Hf

(2−,3+)

Ta

168.94601(3)

4.9(4) min

β+

169Hf

(5/2+)

Ta

169.94618(3)

6.76(6) min

β+

170Hf

(3)(+#)

Ta

170.94448(3)

23.3(3) min

β+

171Hf

(5/2−)

Ta

171.94490(3)

36.8(3) min

β+

172Hf

(3+)

Ta

172.94375(3)

3.14(13) h

β+

173Hf

5/2−

Ta

173.94445(3)

1.14(8) h

β+

174Hf

3+

Ta

174.94374(3)

10.5(2) h

β+

175Hf

7/2+

Ta

175.94486(3)

8.09(5) h

β+

176Hf

(1)−

1.1(1) ms

IT

176Ta

(+)

3.8(4) µs

(14−)

0.97(7) ms

(20−)

Ta

176.944472(4)

56.56(6) h

β+

177Hf

7/2+

410(7) ns

9/2−

3.62(10) µs

5/2−

5.31(25) µs

21/2−

133(4) µs

49/2−

Ta

177.945778(16)

9.31(3) min

β+

178Hf

1+

2.36(8) h

β+

178Hf

(7)−

59(3) ms

(15−)

290(12) ms

(21−)

Ta

178.9459295(23)

1.82(3) a

EC

179Hf

7/2+

1.42(8) µs

(9/2)−

335(45) ns

(1/2)+

322(16) ns

(21/2−)

9.0(2) ms

IT

179Ta

(25/2+)

1.6(4) µs

(23/2−)

54.1(17) ms

(37/2+)

EC (86%)

180Hf

β- (14%)

180W

9−

1.2(2)×10−4

31.2(14) µs

15−

2.0(5) µs

(22−)

17(5) µs

(23,24,25)

Ta

180.9479958(20)

观测上稳定

7/2+

0.99988(2)

6.05(12) µs

9/2−

18(1) µs

1/2+

25(2) µs

21/2−

210(20) µs

29/2−

Ta

181.9501518(19)

114.43(3) d

β-

182W

3−

283(3) ms

IT

182Ta

5+

15.84(10) min

10−

Ta

182.9513726(19)

5.1(1) d

β-

183W

7/2+

107(11) ns

9/2−

Ta

183.954008(28)

8.7(1) h

β-

184W

(5−)

Ta

184.955559(15)

49.4(15) min

β-

185W

(7/2+)#

>1 ms

(21/2−)

Ta

185.95855(6)

10.5(3) min

β-

186W

(2−,3−)

1.54(5) min

Ta

186.96053(21)#

2# min>300 ns

β-

187W

7/2+#

Ta

187.96370(21)#

20# s>300 ns

β-

188W

Ta

188.96583(32)#

3# s>300 ns

7/2+#

Ta

189.96923(43)#

0.3# s

## 参考文献

- 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).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) . Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) .
- 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.

## 基本资料

- infobox_name：tantalum
- 货币符号：Ta
- 日语原文：钽
- standard atomic weight：180.94788(2)