钡的同位素

钡（原子量：137.327(7)）在自然界中有7种同位素，其中6个同位素稳定，剩下的130Ba则有微弱的放射性。除了130Ba以外，钡还有33种人造放射性同位素。

## 图表

β+, p (99.59%)

113Xe

α (.37%)

110Xe

β+ (.04%)

114Cs

CD (<.0034%)

102Sn, 碳

β+

115Cs

β+, p

114Xe

β+

116Cs

β+, p

115Xe

β+

117Cs

β+, α

113I

β+, p

116Xe

β+

118Cs

β+, p

117Xe

β+

119Cs

β+, p

118Xe

120Ba

119.92604(32)

24(2) s

β+

120Cs

0+

β+ (99.98%)

121Cs

β+, p (.02%)

120Xe

122Ba

121.91990(3)

1.95(15) min

β+

122Cs

0+

123Ba

122.918781(13)

2.7(4) min

β+

123Cs

5/2(+)

124Ba

123.915094(13)

11.0(5) min

β+

124Cs

0+

125Ba

124.914473(12)

3.5(4) min

β+

125Cs

1/2(+#)

126Ba

125.911250(13)

100(2) min

β+

126Cs

0+

127Ba

126.911094(12)

12.7(4) min

β+

127Cs

1/2+

1.9(2) s

IT

127Ba

7/2−

128Ba

127.908318(11)

2.43(5) d

β+

128Cs

0+

129Ba

128.908679(12)

2.23(11) h

β+

129Cs

1/2+

β+

129Cs

IT

129Ba

130Ba

129.9063208(30)

1.6(±1.1)×1021 yrs

双电子捕获

130Xe

0+

0.00106(1)

9.54(14) ms

IT

130Ba

8−

131Ba

130.906941(3)

11.50(6) d

β+

131Cs

1/2+

14.6(2) min

IT

131Ba

9/2−

132Ba

131.9050613(11)

观测上稳定

0+

0.00101(1)

133Ba

132.9060075(11)

10.51(5) yrs

EC

133Cs

1/2+

IT (99.99%)

133Ba

EC (.0096%)

133Cs

134Ba

133.9045084(4)

Stable

0+

0.02417(18)

135Ba

134.9056886(4)

Stable

3/2+

0.06592(12)

28.7(2) h

IT

135Ba

11/2−

136Ba

135.9045759(4)

Stable

0+

0.07854(24)

308.4(19) ms

IT

136Ba

7−

137Ba

136.9058274(5)

Stable

3/2+

0.11232(24)

2.552(1) min

IT

137Ba

11/2−

0.59(10) µs

(17/2−)

138Ba

137.9052472(5)

Stable

0+

0.71698(42)

800(100) ns

6+

139Ba

138.9088413(5)

83.06(28) min

β-

139La

7/2−

140Ba

139.910605(9)

12.752(3) d

β-

140La

0+

141Ba

140.914411(9)

18.27(7) min

β-

141La

3/2−

142Ba

141.916453(7)

10.6(2) min

β-

142La

0+

143Ba

142.920627(14)

14.5(3) s

β-

143La

5/2−

144Ba

143.922953(14)

11.5(2) s

β-

144La

0+

145Ba

144.92763(8)

4.31(16) s

β-

145La

5/2−

β- (99.98%)

146La

β-, n (.02%)

145La

β- (99.94%)

147La

β-, n (.06%)

146La

β- (99.6%)

148La

β-, n (.4%)

147La

β- (99.57%)

149La

β-, n (.43%)

148La

β-

150La

β-, n （不常见）

149La

151Ba

150.95081(43)#

200# ms >300 ns

β-

151La

3/2−#

152Ba

151.95427(54)#

100# ms

β-

152La

0+

153Ba

152.95961(86)#

80# ms

β-

153La

5/2−#

## 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：barium
- 货币符号：Ba
- 日语原文：钡
- standard atomic weight：137.327(7)