Nuclide reference
Pm-148 — Promethium-148
Pm-148 की half-life 5.368 d है। मुख्य decay mode: β⁻ decay → Sm-148 (100%)।
Identification
- तत्व
- Promethium (Pm)
- Atomic number Z
- 61
- Mass number A
- 148
- State
- Radioactive
Key quantities
- Half-life
- 5.368 d
- विशिष्ट गतिविधि
- 6.081e+15 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
- β⁻ decay → Sm-148 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 1,465.12 | 22.2 |
| 550.27 | 22 |
| 914.85 | 11.46 |
| 611.26 | 1.021 |
| 896.42 | 0.9812 |
| 592.83 | 0.353 |
| 874.18 | 0.2353 |
| 40.119 · X-ray line | 0.1028 |
| 39.524 · X-ray line | 0.05677 |
| 1,454.21 | 0.05106 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 2,470 | 55.5 |
| 1,004.9 | 33.3 | |
| 1,919.7 | 9.4 | |
| 412.04 | 1.36 |
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.