Isotopes of Iridium (Z=77)

Click on an isotope to get more information about its decay
Isotope Half-life Spin Parity Decay Mode(s) or Abundance
165Ir 300 us (11/2-) %P=87 4, %A=13 4
166Ir 10.5 ms(2-) %A=93 3, %P=7 3
166m1Ir 15.1 ms(9+) %A=98.2 6, %P=1.8 6
167Ir 5 ms %A=?
168Ir 161 ms %A=?
169Ir 0.4 s %A ~ 100, %EC+%B+=?, %P=?
170Ir 1.05 s %EC+%B+=25 sys%A=75 sys
171Ir 1.5 s %A ~ 100, %EC+%B+=?, %P=?
172Ir 4.4 s (3+) %A ~ 2, %EC+%B+=98
172m1Ir 2.0 s (7+) %A=23 3, %EC+%B+=77 3
173Ir 9.0 s (3/2+,5/2+) %EC+%B+ > 93, %A < 7
173m1Ir 2.20 s (11/2-) %EC+%B+=88 1, %A=12 1
174Ir 9 s(3+) %EC+%B+=99.53 27, %A=0.47 27
174m1Ir 4.9 s (7+) %EC+%B+=97.5 3, %A=2.5 3
175Ir 9 s(5/2-) %EC+%B+=99.15 28, %A=0.85 28
176Ir 8 s %EC+%B+=97.9 4, %A=2.1 4
177Ir 30 s(5/2-) %EC+%B+=99.94 1, %A=0.06 1
178Ir 12 s %EC+%B+=100
179Ir 79 s (5/2)- %EC+%B+=100
180Ir 1.5 m %EC+%B+=100
181Ir 4.90 m (5/2)- %EC+%B+=100
182Ir 15 m (5+) %EC+%B+=100
183Ir 58 m 5/2- %EC+%B+=100
184Ir 3.09 h 5- %EC+%B+=100
185Ir 14.4 h5/2- %EC+%B+=100
186Ir 16.64 h 5+ %EC+%B+=100
186m1Ir 1.90 h2- %EC+%B+ ~ 75, %IT ~ 25
187Ir 10.5 h 3/2+ %EC+%B+=100
187m1Ir 30.3 ms 9/2- %IT=100
188Ir 41.5 h1- %EC+%B+=100
188m1Ir 4.2 ms
189Ir 13.2 d 3/2+ %EC=100
189m1Ir 13.3 ms 11/2- %IT=100
189m2Ir 3.7 ms (25/2)+ %IT=100
190Ir 11.78 d (4-) %EC+%B+=100, %B- < 0.002
190m1Ir 1.2 h(1-) %IT=100
190m2Ir 3.25 h (11)- %EC+%B+=94.4 8, %IT=5.6 8
191Ir stable 3/2+ %Abundance=37.3 5
191m1Ir 4.94 s 11/2- %IT=100
191m2Ir 5.5 s %IT=100
192Ir 73.831 d 4(+) %B-=95.24 4, %EC=4.76 4
192m1Ir 1.45 m 1(-) %IT=99.982, %B-=0.018
192m2Ir 241 y (9) %IT=100
193Ir stable 3/2+ %Abundance=62.7 5
193m1Ir 10.53 d 11/2- %IT=100
194Ir 19.28 h 1- %B-=100
194m1Ir 31.85 ms (4+) %IT=100
194m2Ir 171 d (10,11) %B-=100
195Ir 2.5 h3/2+ %B-=100
195m1Ir 3.8 h11/2- %B-=95 5, %IT=5 5
196Ir 52 s(0-) %B-=100
196m1Ir 1.40 h(10,11-) %B- ~ 100 , %IT < 0.3
197Ir 5.8 m3/2+ %B-=100
197m1Ir 8.9 m11/2- %B-=99.75 10, %IT=0.25 10
198Ir 8 s %B-=100
199Ir
Isotope Explorer Nuclear Structure and Decay Data
8th Edition of the Table of Isotopes
Isotopes Project Home Page
 Lawrence Berkeley National Laboratory
Return to Exploring the Isotopes