Nuclide reference
Pt-188 — Platinum-188
The half-life of Pt-188 is 10.2 d. Main decay mode: electron capture to Ir-188 (100%).
Identification
- Element
- Platinum (Pt)
- Atomic number Z
- 78
- Mass number A
- 188
- State
- Radioactive
Key quantities
- Half-life
- 10.2 d
- Specific activity
- 2.519e+15 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 1 TBq / 0.8 TBq
- D-value (НП-067-24)
- 0.04 TBq
Decay modes
- electron capture → Ir-188 — 100 %
- α decay → Os-184 — 0.000026 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 63 (Ir-188) · X-ray line | 54.06 |
| 64.896 · X-ray line | 49.84 |
| 155.05 (Ir-188) | 35.76 |
| 2,214.59 (Ir-188) | 22.48 |
| 633.02 (Ir-188) | 21.59 |
| 187.59 | 19.4 |
| 195.05 | 18.62 |
| 477.99 (Ir-188) | 17.7 |
| 2,059.65 (Ir-188) | 8.496 |
| 1,209.77 (Ir-188) | 8.319 |
Includes daughter nuclides in equilibrium: Ir-188 (yield per decay of Pt-188); the emitting nuclide is in brackets. Equilibrium is reached in about 15 d. In transient equilibrium a daughter's activity exceeds the parent's, so a yield can be above 100%.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 1,611 (Ir-188) | 0.2288 |
| 1,133 (Ir-188) | 0.1445 | |
| 1,288.1 (Ir-188) | 0.01325 |
For β⁺ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.K-series X-ray energies are from NIST SRD 128 (Deslattes et al., 2003): in ENDF/B-VIII.0 they are given to 1 % and shifted by up to 0.7 keV for heavy elements. L-series lines and all yields are ENDF/B-VIII.0.