Nuclide reference
Am-244 — Americium-244
The half-life of Am-244 is 10.1 h. Main decay mode: β⁻ decay to Cm-244 (100%).
Identification
- Element
- Americium (Am)
- Atomic number Z
- 95
- Mass number A
- 244
- State
- Radioactive
Key quantities
- Half-life
- 10.1 h
- Specific activity
- 4.705e+16 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- 0.09 TBq
Decay modes
- β⁻ decay → Cm-244 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 743.971 | 66 |
| 19.2273 · X-ray line | 52.33 |
| 14.9586 · X-ray line | 44.46 |
| 897.848 | 28 |
| 153.863 | 16.4 |
| 99.383 | 4.6 |
| 538.4 | 0.66 |
| 205.575 | 0.34 |
| 42.965 | 0.094 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 387.11 | 100 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Other isotopes of this element
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.