Osmium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
164Ir | 163.99220 (44) |
| 1 | ms | -7,270 (410) | 7,748 (3) | p ? |
|
165Ir | 164.98752 (23) |
| <1 | us | -11,630 (220) | 7,777 (1) | p ? |
|
166Ir | 165.98582 (22) |
| 10.5 | ms | -13,210 (200) | 7,788 (1) | A | 93 3 |
167Ir | 166.981665 (20) |
| 35.2 | ms | -17,079 (19) | 7,812.9 (1.1) | A | 48 6 |
168Ir | 167.97988 (16) |
| 161 | ms | -18,740 (150) | 7,824 (1) | A | 82 14 |
169Ir | 168.976295 (28) |
| 780 | ms | -22,081 (26) | 7,845.5 (1.6) | A | 50 18 |
170Ir | 169.97497 (11) |
| 910 | ms | -23,320 (100) | 7,854 (1) | B+ ? |
|
171Ir | 170.971626 (42) |
| 3.6 | s | -26,430 (40) | 7,873.6 (2.3) | A~100 |
|
172Ir | 171.97046 (11) |
| 4.4 | s | -27,520 (100) | 7,881 (1) | B+ | 98 |
173Ir | 172.967502 (15) |
| 9 | s | -30,272 (14) | 7,898.09 (7.9) | B+>93 |
|
174Ir | 173.966861 (30) |
| 7.9 | s | -30,869 (28) | 7,902.5 (1.6) | B+ | 99.5 3 |
175Ir | 174.964113 (21) |
| 9 | s | -33,429 (20) | 7,918.1 (1.1) | B+ | 99.15 28 |
176Ir | 175.963649 (22) |
| 8.3 | s | -33,861 (20) | 7,921.4 (1.2) | B+ | 96.9 6 |
177Ir | 176.961302 (21) |
| 30 | s | -36,047 (20) | 7,934.6 (1.1) | B+~100 |
|
178Ir | 177.961082 (21) |
| 12 | s | -36,252 (20) | 7,936.5 (1.1) | B+ | 100 |
179Ir | 178.959122 (12) |
| 79 | s | -38,077 (11) | 7,947.50 (6.1) | B+ | 100 |
180Ir | 179.959229 (23) |
| 1.5 | m | -37,978 (22) | 7,947.6 (1.2) | B+ | 100 |
181Ir | 180.957625 (28) |
| 4.9 | m | -39,472 (26) | 7,956.6 (1.4) | B+ | 100 |
182Ir | 181.958076 (23) |
| 15 | m | -39,052 (21) | 7,954.9 (1.2) | B+ | 100 |
183Ir | 182.956846 (27) |
| 58 | m | -40,197 (25) | 7,961.8 (1.4) | B+~100 | |
184Ir | 183.957476 (30) |
| 3.09 | h | -39,611 (28) | 7,959.2 (1.5) | B+ | 100 |
185Ir | 184.956698 (30) |
| 14.4 | h | -40,336 (28) | 7,963.7 (1.5) | B+ | 100 |
186Ir | 185.957946 (18) |
| 16.64 | h | -39,173 (17) | 7,958.05 (8.9) | B+ | 100 |
187Ir | 186.9573634 (66) |
| 10.5 | h | -39,715.8 (6.2) | 7,961.56 (3.3) | B+ | 100 |
188Ir | 187.9588531 (75) |
| 41.5 | h | -38,328.1 (7) | 7,954.76 (3.7) | B+ | 100 |
189Ir | 188.958719 (14) |
| 13.2 | d | -38,453 (13) | 7,956.04 (6.7) | EC | 100 |
190Ir | 189.9605460 (18) |
| 11.78 | d | -36,751.2 (1.7) | 7,947.688 (9) | B+ | 100 |
191Ir | 190.9605940 (18) | 37.3 (2) | stable |
| -36,706.4 (1.7) | 7,948.101 (9) |
|
|
192Ir | 191.9626050 (18) |
| 73.827 | d | -34,833.2 (1.7) | 7,938.986 (9) | B- | 95.13 14 |
193Ir | 192.9629264 (18) | 62.7 (2) | stable |
| -34,533.8 (1.7) | 7,938.121 (9) |
|
|
194Ir | 193.9650784 (18) |
| 19.28 | h | -32,529.3 (1.7) | 7,928.475 (9) | B- | 100 |
195Ir | 194.9659796 (18) |
| 2.5 | h | -31,689.8 (1.7) | 7,924.902 (9) | B- | 100 |
196Ir | 195.968397 (41) |
| 52 | s | -29,438 (38) | 7,914.2 (2) | B- | 100 |
197Ir | 196.969653 (22) |
| 5.8 | m | -28,268 (20) | 7,909.0 (1) | B- | 100 |
198Ir | 197.97228 (21) |
| 8 | s | -25,820 (200) | 7,897 (1) | B- | 100 |
199Ir | 198.973805 (44) |
| 20 | s | -24,401 (41) | 7,891.2 (2.1) | B- ? |
|
164mIr | 163.99220 (44) |
| 94 | us | -7,270 (410) | 7,748 (3) | p | ? |
165mIr | 164.98752 (23) |
| 300 | us | -11,630 (220) | 7,777 (1) | p | 87 4 |
166mIr | 165.98582 (22) |
| 15.1 | ms | -13,210 (200) | 7,788 (1) | A | 98.2 6 |
167mIr | 166.981665 (20) |
| 30 | ms | -17,079 (19) | 7,812.9 (1.1) | A | 80 10 |
168mIr | 167.97988 (16) |
| 125 | ms | -18,740 (150) | 7,824 (1) | A | ? |
169mIr | 168.976295 (28) |
| 308 | ms | -22,081 (26) | 7,845.5 (1.6) | A | 81 7 |
170mIr | 169.97497 (11) |
| 440 | ms | -23,320 (100) | 7,854 (1) | A | 36 10 |
171mIr | 170.971626 (42) |
| 1.4 | s | -26,430 (40) | 7,873.6 (2.3) | A | 58 11 |
172mIr | 171.97046 (11) |
| 2 | s | -27,520 (100) | 7,881 (1) | B+ | 77 3 |
173mIr | 172.967502 (15) |
| 2.2 | s | -30,272 (14) | 7,898.09 (7.9) | B+ | 88 1 |
174mIr | 173.966861 (30) |
| 4.9 | s | -30,869 (28) | 7,902.5 (1.6) | B+ | 97.5 3 |
184mIr | 183.957476 (30) |
| 470 | us | -39,611 (28) | 7,959.2 (1.5) | 0 |
|
186mIr | 185.957946 (18) |
| 1.92 | h | -39,173 (17) | 7,958.05 (8.9) | B+~75 |
|
187mIr | 186.9573634 (66) |
| 30.3 | ms | -39,715.8 (6.2) | 7,961.56 (3.3) | IT | 100 |
188mIr | 187.9588531 (75) |
| 4.2 | ms | -38,328.1 (7) | 7,954.76 (3.7) | IT~100 |
|
189mIr | 188.958719 (14) |
| 13.3 | ms | -38,453 (13) | 7,956.04 (6.7) | IT | 100 |
190mIr | 189.9605460 (18) |
| 1.12 | h | -36,751.2 (1.7) | 7,947.688 (9) | IT | 100 |
191mIr | 190.9605940 (18) |
| 4.94 | s | -36,706.4 (1.7) | 7,948.101 (9) | IT | 100 |
192mIr | 191.9626050 (18) |
| 1.45 | m | -34,833.2 (1.7) | 7,938.986 (9) | IT~100 |
|
193mIr | 192.9629264 (18) |
| 10.53 | d | -34,533.8 (1.7) | 7,938.121 (9) | IT | 100 |
194mIr | 193.9650784 (18) |
| 31.85 | ms | -32,529.3 (1.7) | 7,928.475 (9) | IT | 100 |
195mIr | 194.9659796 (18) |
| 3.8 | h | -31,689.8 (1.7) | 7,924.902 (9) | B- | 95 5 |
196mIr | 195.968397 (41) |
| 1.4 | h | -29,438 (38) | 7,914.2 (2) | B-~100 |
|
197mIr | 196.969653 (22) |
| 8.9 | m | -28,268 (20) | 7,909.0 (1) | B-~100 |
|
189m1Ir | 188.958719 (14) |
| 3.7 | ms | -38,453 (13) | 7,956.04 (6.7) | IT | 100 |
190m1Ir | 189.9605460 (18) |
| 3.087 | h | -36,751.2 (1.7) | 7,947.688 (9) | B+ | 91.4 2 |
191m1Ir | 190.9605940 (18) |
| 5.5 | s | -36,706.4 (1.7) | 7,948.101 (9) | IT | 100 |
192m1Ir | 191.9626050 (18) |
| 241 | y | -34,833.2 (1.7) | 7,938.986 (9) | IT | 100 |
194m1Ir | 193.9650784 (18) |
| 171 | d | -32,529.3 (1.7) | 7,928.475 (9) | B- | 100 |
175mIr | 174.964113 (21) |
|
|
| -33,429 (20) | 7,918.1 (1.1) | 0 |
|
190m1Ir | 189.9605460 (18) |
| >2 | us | -36,751.2 (1.7) | 7,947.688 (9) | IT | 100 |
190m2Ir | 189.9605460 (18) |
| 90 | ns | -36,751.2 (1.7) | 7,947.688 (9) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005