Nuclide reference
Cl-38 — Chlorine-38
The half-life of Cl-38 is 37.23 min. Main decay mode: β⁻ decay to Ar-38 (100%).
Identification
- Element
- Chlorine (Cl)
- Atomic number Z
- 17
- Mass number A
- 38
- State
- Radioactive
Key quantities
- Half-life
- 37.23 min
- Specific activity
- 4.918e+18 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.2 TBq / 0.2 TBq
- D-value (НП-067-24)
- 0.05 TBq
Decay modes
- β⁻ decay → Ar-38 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 2,167.54 | 44.4 |
| 1,642.43 | 33.29 |
| 3,810.03 | 0.02753 |
| 1,209.9 | 0.00999 |
| 2,398.1 | 0.00999 |
| 3,936.1 | 0.00333 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 4,916.5 | 55.6 |
| 1,106.3 | 33.1 | |
| 2,748.9 | 11.3 | |
| 351.1 | 0.01 |
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.