Nuclide reference
Sc-44 — Scandium-44
The half-life of Sc-44 is 3.97 h. Main decay mode: β⁺ decay / electron capture to Ca-44 (100%).
Identification
- Element
- Scandium (Sc)
- Atomic number Z
- 21
- Mass number A
- 44
- State
- Radioactive
Key quantities
- Half-life
- 3.97 h
- Specific activity
- 6.638e+17 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.5 TBq / 0.5 TBq
- D-value (НП-067-24)
- 0.03 TBq
Decay modes
- β⁺ decay / electron capture → Ca-44 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 510.999 · annihilation 511 keV | 188.5 |
| 1,157.02 | 99.9 |
| 1,499.46 | 0.9081 |
| 3.691 · X-ray line | 0.4796 |
| 3.688 · X-ray line | 0.2431 |
| 2,656.48 | 0.1119 |
| 2,144.3 | 0.002997 |
| 3,301.35 | 0.001399 |
| 2,150.84 | 0.001099 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 1,474.3 | 94.27 |
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.