Nuclide reference
Xe-122 — Xenon-122
Xe-122 की half-life 20.1 h है। मुख्य decay mode: electron capture → I-122 (100%)।
Identification
- तत्व
- Xenon (Xe)
- Atomic number Z
- 54
- Mass number A
- 122
- State
- Radioactive
Key quantities
- Half-life
- 20.1 h
- विशिष्ट गतिविधि
- 4.728e+16 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 0.4 TBq / 0.4 TBq
- D-value (НП-067-24)
- 0.06 TBq
Decay modes
- electron capture → I-122 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 510.999 (I-122) · annihilation 511 keV | 156.8 |
| 28.612 · X-ray line | 41.89 |
| 28.318 · X-ray line | 22.56 |
| 564.119 (I-122) | 18.05 |
| 350.065 | 7.8 |
| 148.612 | 2.621 |
| 416.633 | 1.872 |
| 692.794 (I-122) | 1.359 |
| 793.278 (I-122) | 1.331 |
| 683.647 (I-122) | 0.798 |
Includes daughter nuclides in equilibrium: I-122 (yield per decay of Xe-122); the emitting nuclide is in brackets. Equilibrium is reached in about 25 min.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 3,212 (I-122) | 67.2 |
| 2,647.9 (I-122) | 10.03 | |
| 1,854.6 (I-122) | 0.6018 | |
| 1,955.1 (I-122) | 0.3109 |
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.