Input interpretation
![Ir-189 (iridium-189) | Er-158 (erbium-158)](../image_source/e495a0bcc11fd56d42b43175ef0b598c.png)
Ir-189 (iridium-189) | Er-158 (erbium-158)
Decay properties
![| Ir-189 | Er-158 half-life | 13.2 days (13.09 to 13.31 days) | 137.3 min (133.7 to 141.1 min) mean lifetime | 19.1 days (18.88 to 19.2 days) | 198 min (192.99 to 203.51 min) decay constant | 6.06×10^-7 per second | 8.4×10^-5 per second specific activity | 1930 TBq/g | 320000 TBq/g width | 4×10^-22 eV | 5.53×10^-20 eV decay modes | ϵ (electron capture) | ϵ (electron capture) final decay products | Os-189 (100%) | Dy-158 (100%) | Gd-154 (0) | Gd-158 (0) | Nd-142 (0) | Sm-150 (0)](../image_source/b5a15f112eb0dd5e25b92ad8f5b1db03.png)
| Ir-189 | Er-158 half-life | 13.2 days (13.09 to 13.31 days) | 137.3 min (133.7 to 141.1 min) mean lifetime | 19.1 days (18.88 to 19.2 days) | 198 min (192.99 to 203.51 min) decay constant | 6.06×10^-7 per second | 8.4×10^-5 per second specific activity | 1930 TBq/g | 320000 TBq/g width | 4×10^-22 eV | 5.53×10^-20 eV decay modes | ϵ (electron capture) | ϵ (electron capture) final decay products | Os-189 (100%) | Dy-158 (100%) | Gd-154 (0) | Gd-158 (0) | Nd-142 (0) | Sm-150 (0)
Decay modes
Ir-189
![decay mode | ϵ (electron capture) branching ratio | 100% Q-value | 532.3 keV (kiloelectronvolts) daughter nuclide | Os-189](../image_source/74b1d34609bb8301657103406d6820c5.png)
decay mode | ϵ (electron capture) branching ratio | 100% Q-value | 532.3 keV (kiloelectronvolts) daughter nuclide | Os-189
Er-158
![decay mode | ϵ (electron capture) branching ratio | 100% Q-value | 887.2 keV (kiloelectronvolts) daughter nuclide | Ho-158](../image_source/55f27af67b9b7d02b9fa9cedd3d30bd1.png)
decay mode | ϵ (electron capture) branching ratio | 100% Q-value | 887.2 keV (kiloelectronvolts) daughter nuclide | Ho-158
Radiation shielding
![Radiation shielding](../image_source/a5e55c33ba959264f9ce6808305619e8.png)
Radiation shielding
Decay chain
Ir-189
![Decay chain Ir-189](../image_source/a6846652c365eaeec3d913c9402ded7d.png)
Decay chain Ir-189
Er-158
![Decay chain Er-158](../image_source/7d11aa2aae5407f536a60ff6a33df787.png)
Decay chain Er-158
Mass properties
![| Ir-189 | Er-158 atomic number (Z) | 77 | 68 mass number (A) | 189 | 158 neutron number | 112 | 90 atomic mass | 188.958718935 u (unified atomic mass units) | 157.929893474 u (unified atomic mass units) mass excess | -38.453064 MeV (megaelectronvolts) | -65.303809 MeV (megaelectronvolts) binding energy per nucleon | 7.956039 MeV (megaelectronvolts) | 8.147926 MeV (megaelectronvolts)](../image_source/f33d60843a2f5a7a7aab1964531e5114.png)
| Ir-189 | Er-158 atomic number (Z) | 77 | 68 mass number (A) | 189 | 158 neutron number | 112 | 90 atomic mass | 188.958718935 u (unified atomic mass units) | 157.929893474 u (unified atomic mass units) mass excess | -38.453064 MeV (megaelectronvolts) | -65.303809 MeV (megaelectronvolts) binding energy per nucleon | 7.956039 MeV (megaelectronvolts) | 8.147926 MeV (megaelectronvolts)
![Mass properties](../image_source/27881f4197960b407d7bb5fadd42c1aa.png)
Mass properties
Nearby isotopes
![Nearby isotopes](../image_source/b7d738eab3f99a1aea61aae1db5297f1.png)
Nearby isotopes
Quantum properties
![| Ir-189 | Er-158 spin parity J^π | 3/2^+ (atomic boson) | 0^+ (atomic boson) magnetic moment | 0.13 μ_N | 0 μ_N electric quadrupole moment | 1.04 eb (electron barns) | (unknown)](../image_source/715264c564b1819518a59ac8f3fd7d44.png)
| Ir-189 | Er-158 spin parity J^π | 3/2^+ (atomic boson) | 0^+ (atomic boson) magnetic moment | 0.13 μ_N | 0 μ_N electric quadrupole moment | 1.04 eb (electron barns) | (unknown)
![Quantum properties](../image_source/2f085937de280129bfdf793a29c6039b.png)
Quantum properties