Nuclide reference
Cs-132 — Caesium-132
The half-life of Cs-132 is 6.48 d. Main decay mode: β⁺ decay / electron capture to Xe-132 (98.13%).
Identification
- Element
- Caesium (Cs)
- Atomic number Z
- 55
- Mass number A
- 132
- State
- Radioactive
Key quantities
- Half-life
- 6.48 d
- Specific activity
- 5.648e+15 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 1 TBq / 1 TBq
- D-value (НП-067-24)
- 0.1 TBq
Decay modes
- β⁺ decay / electron capture → Xe-132 — 98.13 %
- β⁻ decay → Ba-132 — 1.87 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 667.714 | 97.59 |
| 29.778 · X-ray line | 39.75 |
| 29.458 · X-ray line | 21.43 |
| 464.466 | 1.58 |
| 630.19 | 0.9467 |
| 510.999 · annihilation 511 keV | 0.814 |
| 505.79 | 0.732 |
| 1,317.92 | 0.5856 |
| 1,136 | 0.4763 |
| 567.16 | 0.2233 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 814.4 | 1.51 |
| 247.24 | 0.36 | |
| β⁺, E max | 434.89 | 0.407 |
For β⁻ and β⁺ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Other isotopes of this element
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.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.