Nuclide reference
Ag-110m — Silver-110m
The half-life of Ag-110m is 249.76 d. Main decay mode: β⁻ decay to Cd-110 (98.64%).
Identification
- Element
- Silver (Ag)
- Atomic number Z
- 47
- Mass number A
- 110
- State
- Radioactive
Key quantities
- Half-life
- 249.76 d
- Specific activity
- 1.759e+14 Bq/g
- Gamma constant Γ (H*(10))
- 0.4213 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 421 µSv/h
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.4 TBq / 0.4 TBq
- D-value (НП-067-24)
- 0.02 TBq
Decay modes
- β⁻ decay → Cd-110 — 98.64 %
- isomeric transition → Ag-110 — 1.36 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 657.76 | 94.32 |
| 884.678 | 72.72 |
| 937.485 | 34.24 |
| 1,384.29 | 24.9 |
| 763.942 | 22.62 |
| 706.676 | 16.33 |
| 1,505.03 | 13.6 |
| 677.622 | 10.56 |
| 818.024 | 7.338 |
| 687.009 | 6.442 |
Lines of the nuclide itself (ENDF/B-VIII.0).
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 83.045 | 66.99 |
| 529.86 | 30.16 | |
| 133.01 | 0.3902 | |
| 2,892.2 (Ag-110) | 1.291 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0. Includes daughter nuclides in equilibrium: Ag-110 (yield per decay of Ag-110m); the emitting nuclide is in brackets. Equilibrium is reached in about 2.9 min.
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.Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².