Nuclide reference
Zn-69m — Zinc-69m
The half-life of Zn-69m is 13.76 h. Main decay mode: isomeric transition to Zn-69 (99.97%).
Identification
- Element
- Zinc (Zn)
- Atomic number Z
- 30
- Mass number A
- 69
- State
- Radioactive
Key quantities
- Half-life
- 13.76 h
- Specific activity
- 1.221e+17 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 3 TBq / 0.6 TBq
- D-value (НП-067-24)
- 0.2 TBq
Decay modes
- isomeric transition → Zn-69 — 99.97 %
- β⁻ decay → Ga-69 — 0.033 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 438.634 | 94.77 |
| 8.639 · X-ray line | 1.237 |
| 8.616 · X-ray line | 0.635 |
| 573.9 | 0.033 |
Lines of the nuclide itself (ENDF/B-VIII.0).
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 770.8 | 0.033 |
| 910.1 (Zn-69) | 107.3 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0. Includes daughter nuclides in equilibrium: Zn-69 (yield per decay of Zn-69m); the emitting nuclide is in brackets. Equilibrium is reached in about 7.1 h. In transient equilibrium a daughter's activity exceeds the parent's, so a yield can be above 100%.
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.