Nuclide reference
Tl-200 — Thallium-200
Tl-200 की half-life 1.0875 d है। मुख्य decay mode: β⁺ decay / electron capture → Hg-200 (100%)।
Identification
- तत्व
- Thallium (Tl)
- Atomic number Z
- 81
- Mass number A
- 200
- State
- Radioactive
Key quantities
- Half-life
- 1.0875 d
- विशिष्ट गतिविधि
- 2.221e+16 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 0.9 TBq / 0.9 TBq
- D-value (НП-067-24)
- 0.05 TBq
Decay modes
- β⁺ decay / electron capture → Hg-200 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 367.942 | 87 |
| 70.819 · X-ray line | 41.67 |
| 1,205.75 | 29.93 |
| 68.894 · X-ray line | 24.46 |
| 579.3 | 13.75 |
| 828.27 | 10.79 |
| 1,514.9 | 4.002 |
| 1,363.2 | 3.393 |
| 1,225.44 | 3.35 |
| 1,273.43 | 3.306 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 1,066.1 | 0.341 |
| 1,434 | 0.06 |
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.