Isotopes of Terbium (Z=65)

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Isotope Half-life Spin Parity Decay Mode(s) or Abundance
138Tb %EC+%B+=100
139Tb
140Tb 2.4 s5 %EC+%B+=100, %P=0.26 13
141Tb 3.5 s(5/2-) %EC+%B+=100
142Tb 597 ms1+ %EC+%B+=100 , %ECP=0.0022 11
142m1Tb 303 ms(5-) %IT=100, %EC+%B+ < 0.5
143Tb 12 s(11/2-) %EC+%B+=100
143m1Tb 21 s(5/2+)
144Tb 1 s(1+) %EC+%B+=100
144m1Tb 4.25 s(6-) %IT=66 , %EC+%B+=34
145Tb (1/2+)
145m1Tb 29.5 s(11/2-) %EC+%B+=100
146Tb 8 s1+ %EC+%B+=100
146m1Tb 23 s5- %EC+%B+=100
146m2Tb 1.18 ms(10+) %IT=100
147Tb 1.7 h(1/2+) %EC+%B+=100
147m1Tb 1.83 m(11/2)- %EC+%B+=100
148Tb 60 m2- %EC+%B+=100
148m1Tb 2.20 m9+ %EC+%B+=100
149Tb 4.118 h 1/2+ %EC+%B+=83.3 17 , %A=16.7 17
149m1Tb 4.16 m 11/2- %EC+%B+=99.978 3 , %A=0.022 3
150Tb 3.48 h (2-) %EC+%B+=100, %A<0.05
150m1Tb 5.8 m 9+ %EC+%B+=100
151Tb 17.609 h1/2(+) %EC+%B+=100 , %A=9.5E-3 15
151m1Tb 25 s(11/2-) %IT=93.8 4, %EC+%B+=6.2 4
152Tb 17.5 h2- %EC+%B+=100, %A < 7E-7
152m1Tb 4.2 m 8+ %IT=78.8 8, %EC+%B+=21.2 8
153Tb 2.34 d5/2+ %EC+%B+=100
154Tb 21.5 h 0 %EC+%B+=100, %B- < 0.1
154m1Tb 9.4 h 3- %EC+%B+=78.2 7, %IT=21.8 7, %B- < 0.1
154m2Tb 22.7 h 7- %EC+%B+=98.2 6, %IT=1.8 6
154m3Tb 513 ns
155Tb 5.32 d 3/2+ %EC=100
156Tb 5.35 d 3- %EC+%B+=100 , %B-=?
156m1Tb 24.4 h(7-) %IT=100
156m2Tb 5.3 h(0+) %IT=?, %EC+%B+=?
157Tb 71 y 3/2+ %EC=100
158Tb 180 y3- %EC+%B+=83.4 7, %B-=16.6 7
158m1Tb 10.70 s 0- %IT=100, %B- < 0.6, %EC+%B+ < 0.01
159Tb stable 3/2+ %Abundance=100
160Tb 72.3 d3- %B-=100
161Tb 6.88 d3/2+ %B-=100
162Tb 7.60 m 1- %B-=100
163Tb 19.5 m3/2+ %B-=100
164Tb 3.0 m (5+) %B-=100
165Tb 2.11 m(3/2+) %B-=100
166Tb
167Tb
168Tb
169Tb
170Tb
171Tb
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8th Edition of the Table of Isotopes
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