Nuclide reference
Bk-250 — Berkelium-250
Bk-250 की half-life 3.212 h है। मुख्य decay mode: β⁻ decay → Cf-250 (100%)।
Identification
- तत्व
- Berkelium (Bk)
- Atomic number Z
- 97
- Mass number A
- 250
- State
- Radioactive
Key quantities
- Half-life
- 3.212 h
- विशिष्ट गतिविधि
- 1.444e+17 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
- β⁻ decay → Cf-250 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 989.125 | 45 |
| 1,031.85 | 35.6 |
| 20.353 · X-ray line | 10.68 |
| 15.6565 · X-ray line | 9.488 |
| 1,028.65 | 4.905 |
| 889.956 | 1.53 |
| 929.468 | 1.233 |
| 99.166 | 0.1283 |
| 828.812 | 0.117 |
| 1,615.29 | 0.0459 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 748.15 | 83.4 |
| 708.63 | 6.23 | |
| 1,737.3 | 4.9 | |
| 1,780 | 4.9 |
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 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।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.