Nuclide reference
Nd-149 — Neodymium-149
Nd-149 की half-life 1.728 h है। मुख्य decay mode: β⁻ decay → Pm-149 (100%)।
Identification
- तत्व
- Neodymium (Nd)
- Atomic number Z
- 60
- Mass number A
- 149
- State
- Radioactive
Key quantities
- Half-life
- 1.728 h
- विशिष्ट गतिविधि
- 4.503e+17 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 0.6 TBq / 0.5 TBq
- D-value (НП-067-24)
- 0.2 TBq
Decay modes
- β⁻ decay → Pm-149 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 211.309 | 25.9 |
| 114.314 | 19.17 |
| 38.726 · X-ray line | 16.51 |
| 270.166 | 10.72 |
| 38.173 · X-ray line | 9.099 |
| 654.831 | 7.951 |
| 423.553 | 7.433 |
| 540.509 | 6.579 |
| 267.693 | 6.035 |
| 155.873 | 5.931 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 1,478.7 | 24.7 |
| 1,152.1 | 21.5 | |
| 1,035.2 | 19.1 | |
| 1,419.8 | 17.5 |
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.