Isotopes of Tantalum (Z=73)

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Isotope Half-life Spin Parity Decay Mode(s) or Abundance
156Ta 144 ms (2-) %P ~ 100
156m1Ta 375 ms (9+) %EC+%B+=95.8 9, %P=4.2 9
157Ta 10.1 ms 1/2+ %A=96.6 12, %P=3.4 12
157m1Ta 4.3 ms 11/2- %EC+%B+ ~ 5
158Ta 36.5 ms (2-) %A=93 6, %EC+%B+=7 6
158m1Ta 49 ms (9+) %A ~ 100
159Ta 0.57 s %A=80 5, %EC+%B+=20 5
160Ta 1.55 s(9+) %EC+%B+=66, %A=34
160m1Ta 1.7 s(2-) %A=?
161Ta 2.7 s %EC+%B+ ~ 95, %A ~ 5
162Ta 3.52 s %EC+%B+=99.926 10, %A=0.074 10
163Ta 10.6 s %EC+%B+ ~ 99.8, %A ~ 0.2
164Ta 14.2 s(3+) %EC+%B+=100
165Ta 31.0 s %EC+%B+=100
166Ta 34.4 s(2)+ %EC+%B+=100
167Ta 1.4 m(3/2+) %EC+%B+=100
168Ta 2.0 m (3+) %EC+%B+=100
169Ta 4.9 m (5/2-) %EC+%B+=100
170Ta 6.76 m(3+) %EC+%B+=100
171Ta 23.3 m (5/2-) %EC+%B+=100
172Ta 36.8 m(3+) %EC+%B+=100
173Ta 3.14 h 5/2- %EC+%B+=100
174Ta 1.05 h3+ %EC+%B+=100
174m1Ta 250 ns
175Ta 10.5 h7/2+ %EC+%B+=100
176Ta 8.09 h (1)- %EC+%B+=100
176m1Ta 1.1 ms (+) %IT=100
176m2Ta 1.4 ms(20-)
177Ta 56.56 h7/2+ %EC+%B+=100
178Ta 9.31 m1+ %EC+%B+=100
178m1Ta 2.36 h(7)- %EC+%B+=100
178m2Ta 60 ms(15-) %IT=100
179Ta 1.82 y7/2+ %EC=100
179m1Ta 9.0 ms(25/2+)
179m2Ta 52 ms(37/2+)
180Ta 8.152 h1+ %Abundance=0.012 2, %EC=86 3, %B-=14 3
180m1Ta 1.2e+15 y 9-
181Ta stable 7/2+ %Abundance=99.988 2
182Ta 114.43 d 3- %B-=100
182m1Ta 283 ms 5+ %IT=100
182m2Ta 15.84 m 10- %IT=100
183Ta 5.1 d 7/2+ %B-=100
184Ta 8.7 h (5-) %B-=100
185Ta 49.4 m(7/2+) %B-=100
186Ta 10.5 m (2-,3-) %B-=100
187Ta
188Ta
Isotope Explorer Nuclear Structure and Decay Data
8th Edition of the Table of Isotopes
Isotopes Project Home Page
Lawrence Berkeley National Laboratory
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