Nuclide reference
Th-232 — Thorium-232
Th-232 की half-life 14.05 billion years है। मुख्य decay mode: α decay → Ra-228 (100%)।
Identification
- तत्व
- Thorium (Th)
- Atomic number Z
- 90
- Mass number A
- 232
- State
- Radioactive
Key quantities
- Half-life
- 14.05 billion years
- विशिष्ट गतिविधि
- 4,058 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- असीमित / असीमित
- D-value (НП-067-24)
- —
Decay modes
- α decay → Ra-228 — 100 %
- spontaneous fission — 1.4e-9 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 15.2109 · X-ray line | 3.718 |
| 12.3298 · X-ray line | 3.088 |
| 63.81 | 0.263 |
| 140.88 | 0.021 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 4,012.3 | 78.2 |
| 3,947.2 | 21.7 | |
| 3,811.1 | 0.069 |
Related calculators
इसी element के अन्य isotopes
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.