Nuclide reference
I-124 — Iodine-124
The half-life of I-124 is 4.176 d. Main decay mode: β⁺ decay / electron capture to Te-124 (100%).
Identification
- Element
- Iodine (I)
- Atomic number Z
- 53
- Mass number A
- 124
- State
- Radioactive
Key quantities
- Half-life
- 4.176 d
- Specific activity
- 9.33e+15 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 1 TBq / 1 TBq
- D-value (НП-067-24)
- 0.06 TBq
Decay modes
- β⁺ decay / electron capture → Te-124 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 602.73 | 62.9 |
| 510.999 · annihilation 511 keV | 45.39 |
| 27.472 · X-ray line | 31.31 |
| 27.202 · X-ray line | 16.82 |
| 1,690.96 | 11.15 |
| 722.78 | 10.36 |
| 1,509.36 | 3.252 |
| 1,376.09 | 1.793 |
| 1,325.52 | 1.578 |
| 645.85 | 0.9963 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 1,534.9 | 11.7 |
| 2,137.6 | 10.7 | |
| 812.09 | 0.293 |
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.