Nuclide reference
Ar-41 — Argon-41
The half-life of Ar-41 is 1.8268 h. Main decay mode: β⁻ decay to K-41 (100%).
Identification
- Element
- Argon (Ar)
- Atomic number Z
- 18
- Mass number A
- 41
- State
- Radioactive
Key quantities
- Half-life
- 1.8268 h
- Specific activity
- 1.548e+18 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.3 TBq / 0.3 TBq
- D-value (НП-067-24)
- 0.05 TBq
Decay modes
- β⁻ decay → K-41 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 1,293.64 | 99.16 |
| 1,677 | 0.05156 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 1,198.1 | 99.16 |
| 2,491.7 | 0.78 | |
| 814.7 | 0.052 |
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.