Nuclide reference
Pa-234 — Protactinium-234
Pa-234 की half-life 6.7 h है। मुख्य decay mode: β⁻ decay → U-234 (100%)।
Identification
- तत्व
- Protactinium (Pa)
- Atomic number Z
- 91
- Mass number A
- 234
- State
- Radioactive
Key quantities
- Half-life
- 6.7 h
- विशिष्ट गतिविधि
- 7.396e+16 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
- β⁻ decay → U-234 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 17.0955 · X-ray line | 44.1 |
| 13.6102 · X-ray line | 41.7 |
| 131.3 | 18.55 |
| 946 | 13.78 |
| 880.5 | 10.71 |
| 883.24 | 9.858 |
| 569.5 | 8.48 |
| 925 | 8.056 |
| 926.72 | 7.42 |
| 733.39 | 7.102 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 470.6 | 34 |
| 641.4 | 20.4 | |
| 471.1 | 12.9 | |
| 411.4 | 8 |
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.