Nuclide reference
Cd-115 — Cadmium-115
The half-life of Cd-115 is 2.2275 d. Main decay mode: β⁻ decay to In-115m (100%).
Identification
- Element
- Cadmium (Cd)
- Atomic number Z
- 48
- Mass number A
- 115
- State
- Radioactive
Key quantities
- Half-life
- 2.2275 d
- Specific activity
- 1.886e+16 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 3 TBq / 0.4 TBq
- D-value (НП-067-24)
- 0.2 TBq
Decay modes
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 336.241 (In-115m) | 49.98 |
| 527.901 | 27.45 |
| 24.21 (In-115m) · X-ray line | 19.77 |
| 24.002 (In-115m) · X-ray line | 10.51 |
| 492.351 | 8.03 |
| 260.896 | 1.94 |
| 231.443 | 0.74 |
| 35.57 | 0.421 |
| 266.985 | 0.092 |
| 497.37 (In-115m) | 0.05131 |
Includes daughter nuclides in equilibrium: In-115m (yield per decay of Cd-115); the emitting nuclide is in brackets. Equilibrium is reached in about 34 h. In transient equilibrium a daughter's activity exceeds the parent's, so a yield can be above 100%.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 1,109.7 | 62.6 |
| 581.85 | 33.1 | |
| 617.4 | 3.3 | |
| 831.24 (In-115m) | 5.458 |
For 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.