Nuclide reference
Am-241 — Americium-241
Am-241 की half-life 432.6 years है। मुख्य decay mode: α decay → Np-237 (100%)।
Identification
- तत्व
- Americium (Am)
- Atomic number Z
- 95
- Mass number A
- 241
- State
- Radioactive
Key quantities
- Half-life
- 432.6 years
- विशिष्ट गतिविधि
- 1.269e+11 Bq/g
- Gamma constant Γ (H*(10))
- 0.0069 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 6.9 µSv/h
- परिवहन के लिए A1 / A2 (SSR-6)
- 10 TBq / 0.001 TBq
- D-value (НП-067-24)
- 0.06 TBq
Decay modes
- α decay → Np-237 — 100 %
- spontaneous fission — 4.3e-10 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 59.5409 | 35.9 |
| 13.9388 · X-ray line | 10.73 |
| 17.5393 · X-ray line | 10.54 |
| 26.3446 | 2.27 |
| 33.196 | 0.126 |
| 43.42 | 0.073 |
| 98.97 | 0.0203 |
| 102.98 | 0.0195 |
| 55.56 | 0.0181 |
| 42.704 | 0.0055 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 5,485.6 | 84.8 |
| 5,442.8 | 13.1 | |
| 5,388 | 1.66 | |
| 5,544.5 | 0.37 |
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 1 m पर H*(10) है, ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) से गणना की गई, equilibrium में short-lived progeny सहित (जैसे Cs-137/Ba-137m, Ra-226 series); specific activity molar mass M ≈ mass number A का उपयोग करती है।Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².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.