Nuclide reference
Sb-124 — Antimony-124
The half-life of Sb-124 is 60.2 d. Main decay mode: β⁻ decay to Te-124 (100%).
Identification
- Element
- Antimony (Sb)
- Atomic number Z
- 51
- Mass number A
- 124
- State
- Radioactive
Key quantities
- Half-life
- 60.2 d
- Specific activity
- 6.472e+14 Bq/g
- Gamma constant Γ (H*(10))
- 0.2661 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 266 µSv/h
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.6 TBq / 0.6 TBq
- D-value (НП-067-24)
- 0.04 TBq
Decay modes
- β⁻ decay → Te-124 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 602.726 | 97.79 |
| 1,690.97 | 47.57 |
| 722.782 | 10.76 |
| 645.852 | 7.42 |
| 2,090.93 | 5.486 |
| 1,368.16 | 2.624 |
| 713.776 | 2.276 |
| 968.195 | 1.882 |
| 1,045.13 | 1.833 |
| 1,325.5 | 1.58 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 610.59 | 51.24 |
| 2,301.6 | 23.2 | |
| 210.62 | 8.75 | |
| 1,578.8 | 4.88 |
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.Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².