Nuclide reference
Pm-144 — Promethium-144
Pm-144 की half-life 363 d है। मुख्य decay mode: β⁺ decay / electron capture → Nd-144 (100%)।
Identification
- तत्व
- Promethium (Pm)
- Atomic number Z
- 61
- Mass number A
- 144
- State
- Radioactive
Key quantities
- Half-life
- 363 d
- विशिष्ट गतिविधि
- 9.243e+13 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 0.7 TBq / 0.7 TBq
- D-value (НП-067-24)
- 0.04 TBq
Decay modes
- β⁺ decay / electron capture → Nd-144 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 696.49 | 99.49 |
| 618.01 | 98.5 |
| 476.78 | 43.78 |
| 37.361 · X-ray line | 40.93 |
| 36.848 · X-ray line | 22.47 |
| 778.57 | 1.502 |
| 694 | 0.5472 |
| 814.14 | 0.5472 |
| 582.4 | 0.189 |
| 301.7 | 0.1791 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
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.