Nuclide reference
In-114m — Indium-114m
The half-life of In-114m is 49.51 d. Main decay mode: isomeric transition to In-114 (96.75%).
Identification
- Element
- Indium (In)
- Atomic number Z
- 49
- Mass number A
- 114
- State
- Radioactive
Key quantities
- Half-life
- 49.51 d
- Specific activity
- 8.56e+14 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 10 TBq / 0.5 TBq
- D-value (НП-067-24)
- 0.8 TBq
Decay modes
- isomeric transition → In-114 — 96.75 %
- β⁺ decay / electron capture → Cd-114 — 3.25 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 24.21 · X-ray line | 18.55 |
| 190.27 | 15.56 |
| 24.002 · X-ray line | 9.487 |
| 558.43 | 3.242 |
| 725.24 | 3.242 |
| 1,299.83 (In-114) | 0.1348 |
Includes daughter nuclides in equilibrium: In-114 (yield per decay of In-114m); the emitting nuclide is in brackets. Equilibrium is reached in about 8.4 min.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 1,988.7 (In-114) | 96.13 |
| 688.78 (In-114) | 0.1354 |
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.