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**
114Ba
56
58
113.95068(15)
530(230) ms0.43(+30−15) s
β+, p (99.59%)
113Xe
0+
α (.37%)
110Xe
β+ (.04%)
114Cs
CD (102Sn, link=yes
115Ba
56
59
114.94737(64)#
0.45(5) s
β+
115Cs
(5/2+)#
β+, p
114Xe
116Ba
56
60
115.94138(43)#
1.3(2) s
β+
116Cs
0+
β+, p
115Xe
117Ba
56
61
116.93850(32)#
1.75(7) s
β+
117Cs
(3/2)(+#)
β+, α
113I
β+, p
116Xe
118Ba
56
62
117.93304(21)#
5.2(2) s
β+
118Cs
0+
β+, p
117Xe
119Ba
56
63
118.93066(21)
5.4(3) s
β+
119Cs
(5/2+)
β+, p
118Xe
120Ba
56
64
119.92604(32)
24(2) s
β+
120Cs
0+
121Ba
56
65
120.92405(15)
29.7(15) s
β+ (99.98%)
121Cs
5/2(+)
β+, p (.02%)
120Xe
122Ba
56
66
121.91990(3)
1.95(15) min
β+
122Cs
0+
123Ba
56
67
122.918781(13)
2.7(4) min
β+
123Cs
5/2(+)
124Ba
56
68
123.915094(13)
11.0(5) min
β+
124Cs
0+
125Ba
56
69
124.914473(12)
3.5(4) min
β+
125Cs
1/2(+#)
126Ba
56
70
125.911250(13)
100(2) min
β+
126Cs
0+
127Ba
56
71
126.911094(12)
12.7(4) min
β+
127Cs
1/2+
127mBa
80.33(12) keV
1.9(2) s
IT
127Ba
7/2−
128Ba
56
72
127.908318(11)
2.43(5) d
β+
128Cs
0+
129Ba
56
73
128.908679(12)
2.23(11) h
β+
129Cs
1/2+
129mBa
8.42(6) keV
2.16(2) h
β+
129Cs
7/2+#
IT
129Ba
130Ba
56
74
129.9063208(30)
1.6(±1.1)×1021 yrs
DEC
130Xe
0+
0.00106(1)
130mBa
2475.12(18) keV
9.54(14) ms
IT
130Ba
8−
131Ba
56
75
130.906941(3)
11.50(6) d
β+
131Cs
1/2+
131mBa
187.14(12) keV
14.6(2) min
IT
131Ba
9/2−
132Ba
56
76
131.9050613(11)
观测上稳定
0+
0.00101(1)
133Ba
56
77
132.9060075(11)
10.51(5) yrs
EC
133Cs
1/2+


133mBa
288.247(9) keV
38.9(1) h
IT (99.99%)
133Ba
11/2−
EC (.0096%)
133Cs
134Ba
56
78
133.9045084(4)
Stable
0+
0.02417(18)
135Ba
56
79
134.9056886(4)
Stable
3/2+
0.06592(12)
135mBa
268.22(2) keV
28.7(2) h
IT
135Ba
11/2−
136Ba
56
80
135.9045759(4)
Stable
0+
0.07854(24)
136mBa
2030.466(18) keV
308.4(19) ms
IT
136Ba
7−
137Ba
56
81
136.9058274(5)
Stable
3/2+
0.11232(24)
137m1Ba
661.659(3) keV
2.552(1) min
IT
137Ba
11/2−
137m2Ba
2349.1(4) keV
0.59(10) µs
(17/2−)
138Ba
56
82
137.9052472(5)
Stable
0+
0.71698(42)
138mBa
2090.54(6) keV
800(100) ns
6+
139Ba
56
83
138.9088413(5)
83.06(28) min
β-
139La
7/2−
140Ba
56
84
139.910605(9)
12.752(3) d
β-
140La
0+
141Ba
56
85
140.914411(9)
18.27(7) min
β-
141La
3/2−
142Ba
56
86
141.916453(7)
10.6(2) min
β-
142La
0+
143Ba
56
87
142.920627(14)
14.5(3) s
β-
143La
5/2−
144Ba
56
88
143.922953(14)
11.5(2) s
β-
144La
0+
145Ba
56
89
144.92763(8)
4.31(16) s
β-
145La
5/2−
146Ba
56
90
145.93022(8)
2.22(7) s
β- (99.98%)
146La
0+
β-, n (.02%)
145La
147Ba
56
91
146.93495(22)#
0.893(1) s
β- (99.94%)
147La
(3/2+)
β-, n (.06%)
146La
148Ba
56
92
147.93772(9)
0.612(17) s
β- (99.6%)
148La
0+
β-, n (.4%)
147La
149Ba
56
93
148.94258(21)#
344(7) ms
β- (99.57%)
149La
3/2−#

β-, n (.43%)
148La
150Ba
56
94
149.94568(43)#
300 ms
β-
150La
0+
β-, n （不常见）
149La
151Ba
56
95
150.95081(43)#
200# ms >300 ns
β-
151La
3/2−#
152Ba
56
96
151.95427(54)#
100# ms
β-
152La
0+
153Ba
56
97
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) date=20110324090740 . Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and  Atomic Weights Revised (2005) date=20080305062433 .- 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 date=20110716114059 , Nuc. Phys. A 729, pp. 3-128 (2003).
** National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the  NuDat 2.1 database date=20190513230730  (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.