Nuclide reference
Tl-208 — Thallium-208
Tl-208 की half-life 3.053 min है। मुख्य decay mode: β⁻ decay → Pb-208 (100%)।
Identification
- तत्व
- Thallium (Tl)
- Atomic number Z
- 81
- Mass number A
- 208
- State
- Radioactive
Key quantities
- Half-life
- 3.053 min
- विशिष्ट गतिविधि
- 1.096e+19 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
- β⁻ decay → Pb-208 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 2,614.51 | 99.75 |
| 583.187 | 85 |
| 510.77 | 22.6 |
| 860.557 | 12.5 |
| 277.371 | 6.6 |
| 74.97 · X-ray line | 3.435 |
| 72.807 · X-ray line | 2.044 |
| 763.13 | 1.79 |
| 252.61 | 0.78 |
| 1,093.9 | 0.43 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 1,801.3 | 49.1 |
| 1,290.6 | 24.2 | |
| 1,523.9 | 22.2 | |
| 1,038.1 | 3.18 |
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.