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180m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**
155
73
82
154.97459(54)#
13(4) µs12(+4−3) µs
(11/2−)
156
73
83
155.97230(43)#
144(24) ms
β+ (95.8%)
156Hf
(2−)
p (4.2%)
155Hf
m
102(7) keV
0.36(4) s
p
155Hf
9+
157
73
84
156.96819(22)
10.1(4) ms
α (91%)
153Lu
1/2+
β+ (9%)
157Hf
m1
22(5) keV
4.3(1) ms
11/2−
m2
1593(9) keV
1.7(1) ms
α
153Lu
(25/2−)
158
73
85
157.96670(22)#
49(8) ms
α (96%)
154Lu
(2−)
β+ (4%)
158Hf
m
141(9) keV
36.0(8) ms
α (93%)
154Lu
(9+)
IT
158Ta
β+
158Hf
159
73
86
158.963018(22)
1.04(9) s
β+ (66%)
159Hf
(1/2+)
α (34%)
155Lu
m
64(5) keV
514(9) ms
α (56%)
155Lu
(11/2−)
β+ (44%)
159Hf
160
73
87
159.96149(10)
1.70(20) s
α
156Lu
(2#)−
β+
160Hf
m
310(90)# keV
1.55(4) s
β+ (66%)
160Hf
(9)+
α (34%)
156Lu
161
73
88
160.95842(6)#
3# s
β+ (95%)
161Hf
1/2+#
α (5%)
157Lu
m
50(50)# keV
2.89(12) s
11/2−#
162
73
89
161.95729(6)
3.57(12) s
β+ (99.92%)
162Hf
3+#
α (.073%)
158Lu
163
73
90
162.95433(4)
10.6(18) s
β+ (99.8%)
163Hf
1/2+#
α (.2%)
159Lu
164
73
91
163.95353(3)
14.2(3) s
β+
164Hf
(3+)
165
73
92
164.950773(19)
31.0(15) s
β+
165Hf
5/2−#
m
60(30) keV
9/2−#
166
73
93
165.95051(3)
34.4(5) s
β+
166Hf
(2)+
167
73
94
166.94809(3)
1.33(7) min
β+
167Hf
(3/2+)
168
73
95
167.94805(3)
2.0(1) min
β+
168Hf
(2−,3+)
169
73
96
168.94601(3)
4.9(4) min
β+
169Hf
(5/2+)
170
73
97
169.94618(3)
6.76(6) min
β+
170Hf
(3)(+#)
171
73
98
170.94448(3)
23.3(3) min
β+
171Hf
(5/2−)
172
73
99
171.94490(3)
36.8(3) min
β+
172Hf
(3+)
173
73
100
172.94375(3)
3.14(13) h
β+
173Hf
5/2−
174
73
101
173.94445(3)
1.14(8) h
β+
174Hf
3+
175
73
102
174.94374(3)
10.5(2) h
β+
175Hf
7/2+
176
73
103
175.94486(3)
8.09(5) h
β+
176Hf
(1)−
m1
103.0(10) keV
1.1(1) ms
IT
176Ta
(+)
m2
1372.6(11)+X keV
3.8(4) µs
(14−)
m3
2820(50) keV
0.97(7) ms
(20−)
177
73
104
176.944472(4)
56.56(6) h
β+
177Hf
7/2+
m1
73.36(15) keV
410(7) ns
9/2−
m2
186.15(6) keV
3.62(10) µs
5/2−
m3
1355.01(19) keV
5.31(25) µs
21/2−
m4
4656.3(5) keV
133(4) µs
49/2−
178
73
105
177.945778(16)
9.31(3) min
β+
178Hf
1+
m1
100(50)# keV
2.36(8) h
β+
178Hf
(7)−
m2
1570(50)# keV
59(3) ms
(15−)
m3
3000(50)# keV
290(12) ms
(21−)
179
73
106
178.9459295(23)
1.82(3) a
EC
179Hf
7/2+
m1
30.7(1) keV
1.42(8) µs
(9/2)−
m2
520.23(18) keV
335(45) ns
(1/2)+
m3
1252.61(23) keV
322(16) ns
(21/2−)
m4
1317.3(4) keV
9.0(2) ms
IT
179Ta
(25/2+)
m5
1327.9(4) keV
1.6(4) µs
(23/2−)
m6
2639.3(5) keV
54.1(17) ms
(37/2+)
180
73
107
179.9474648(24)
8.152(6) h
EC (86%)
180Hf
1+
β- (14%)
180W
钽-180m1
77.1(8) keV
观测上稳定
9−
1.2(2)×10−4
m2
1452.40(18) keV
31.2(14) µs
15−
m3
3679.0(11) keV
2.0(5) µs
(22−)
m4
4171.0+X keV
17(5) µs
(23,24,25)
181
73
108
180.9479958(20)
观测上稳定
7/2+
0.99988(2)
m1
6.238(20) keV
6.05(12) µs
9/2−
m2
615.21(3) keV
18(1) µs
1/2+
m3
1485(3) keV
25(2) µs
21/2−
m4
2230(3) keV
210(20) µs
29/2−
182
73
109
181.9501518(19)
114.43(3) d
β-
182W
3−
m1
16.263(3) keV
283(3) ms
IT
182Ta
5+
m2
519.572(18) keV
15.84(10) min
10−
183
73
110
182.9513726(19)
5.1(1) d
β-
183W
7/2+
m
73.174(12) keV
107(11) ns
9/2−
184
73
111
183.954008(28)
8.7(1) h
β-
184W
(5−)
185
73
112
184.955559(15)
49.4(15) min
β-
185W
(7/2+)#
m
1308(29) keV
>1 ms
(21/2−)
186
73
113
185.95855(6)
10.5(3) min
β-
186W
(2−,3−)
m
1.54(5) min
187
73
114
186.96053(21)#
2# min>300 ns
β-
187W
7/2+#
188
73
115
187.96370(21)#
20# s>300 ns
β-
188W
189
73
116
188.96583(32)#
3# s>300 ns
7/2+#
190
73
117
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) 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.