Isotopes of Thallium (Z=81)

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Isotope Half-life Spin Parity Decay Mode(s) or Abundance
177Tl
178Tl
179Tl 0.16 s %A ~ 100
179m1Tl 1.4 ms (9/2-) %A ~ 100
180Tl 0.70 s %EC+%B+=?, %ECSF ~ 1.0E-4
181Tl (1/2+)
181m1Tl 3.4 s (9/2-) %A=?
182Tl 3.1 s (7+) %EC+%B+ > 96, %A < 4
183Tl (1/2+)
183m1Tl 60 ms (9/2-) %A < 0.010
184Tl 11 s %EC+%B+=97.9 7, %A=2.1 7
185Tl 19.5 s (1/2+) %EC+%B+=?
185m1Tl 1.83 s(9/2-) %IT=?, %A=?
186Tl 27.5 s(7+) %EC+%B+=100, %A ~ 0.006
186m1Tl 2.9 s(10-) %IT=100
187Tl 51 s(1/2+) %EC+%B+=?, %A=?
187m1Tl 15.60 s(9/2-) %A=?, %EC+%B+=?, %IT=?
188Tl 71 s (2-) %EC+%B+=100
188m1Tl 71 s (7+) %EC+%B+=100
188m2Tl 41 ms (9-) %IT=100
189Tl 2.3 m(1/2+) %EC+%B+=100
189m1Tl 1.4 m(9/2-) %EC+%B+=100, %IT<4
190Tl 2.6 m(2)- %EC+%B+=100
190m1Tl 3.7 m(7+) %EC+%B+=100
191Tl (1/2+)
191m1Tl 5.22 m9/2(-) %EC+%B+=100
192Tl 9.6 m (2-) %EC+%B+=100
192m1Tl 10.8 m (7+) %EC+%B+=100
193Tl 21.6 m 1/2+ %EC+%B+=100
193m1Tl 2.11 m 9/2- %IT=75, %EC+%B+=25
194Tl 33.0 m 2- %EC+%B+=100 , %A < 1E-7
194m1Tl 32.8 m (7+) %EC+%B+=100
195Tl 1.16 h1/2+ %EC+%B+=100
195m1Tl 3.6 s9/2- %IT=100
196Tl 1.84 h2- %EC+%B+=100
196m1Tl 1.41 h(7+) %EC+%B+=95.5 , %IT=4.5
197Tl 2.84 h1/2+ %EC+%B+=100
197m1Tl 0.54 s 9/2- %IT=100
198Tl 5.3 h2- %EC+%B+=100
198m1Tl 1.87 h7+ %IT=46 2, %EC+%B+=54 2
198m2Tl 32.1 ms(10-) %IT=100
199Tl 7.42 h 1/2+ %EC+%B+=100
199m1Tl 28.4 ms 9/2- %IT=100
200Tl 26.1 h 2- %EC+%B+=100
200m1Tl 34.3 ms 7+ %IT=100
201Tl 72.912 h 1/2+ %EC=100
201m1Tl 2.035 ms (9/2-) %IT=100
202Tl 12.23 d 2- %EC+%B+=100
202m1Tl 572 us 7+
203Tl stable 1/2+ %Abundance=29.524 14
204Tl 3.78 y 2- %B-=97.10 12, %EC+%B+=2.90 12
205Tl stable 1/2+ %Abundance=70.476 14
206Tl 4.199 m 0- %B-=100
206m1Tl 3.74 m (12-) %IT=100
207Tl 4.77 m 1/2+ %B-=100
207m1Tl 1.33 s 11/2- %IT=100, %B- < 0.1
208Tl 3.053 m 5(+) %B-=100
209Tl 2.20 m (1/2+) %B-=100
210Tl 1.30 m(5+) %B-=100, %B-N=0.007 +7-4
Isotope Explorer Nuclear Structure and Decay Data
8th Edition of the Table of Isotopes
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