Nuclide reference
Pt-197 — Platinum-197
The half-life of Pt-197 is 19.892 h. Main decay mode: β⁻ decay to Au-197 (100%).
Identification
- Element
- Platinum (Pt)
- Atomic number Z
- 78
- Mass number A
- 197
- State
- Radioactive
Key quantities
- Half-life
- 19.892 h
- Specific activity
- 2.959e+16 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 20 TBq / 0.6 TBq
- D-value (НП-067-24)
- 4 TBq
Decay modes
- β⁻ decay → Au-197 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 77.35 | 17.02 |
| 191.437 | 3.66 |
| 68.807 · X-ray line | 1.631 |
| 66.993 · X-ray line | 0.9584 |
| 268.78 | 0.2306 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 641.35 | 81.2 |
| 718.7 | 10.6 | |
| 449.92 | 8.2 |
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.