Nuclide reference
Cu-64 — Copper-64
The half-life of Cu-64 is 12.701 h. Main decay mode: β⁺ decay / electron capture to Ni-64 (61.5%).
Identification
- Element
- Copper (Cu)
- Atomic number Z
- 29
- Mass number A
- 64
- State
- Radioactive
Key quantities
- Half-life
- 12.701 h
- Specific activity
- 1.426e+17 Bq/g
- Gamma constant Γ (H*(10))
- 0.0306 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 30.6 µSv/h
- A1 / A2 for transport (SSR-6, НП-053-16)
- 6 TBq / 1 TBq
- D-value (НП-067-24)
- 0.3 TBq
Decay modes
- β⁺ decay / electron capture → Ni-64 — 61.5 %
- β⁻ decay → Zn-64 — 38.5 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 510.999 · annihilation 511 keV | 35.2 |
| 7.478 · X-ray line | 9.238 |
| 7.46 · X-ray line | 4.73 |
| 1,345.77 | 0.4754 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 579.4 | 38.49 |
| β⁺, E max | 653.03 | 17.6 |
For β⁻ and β⁺ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
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.Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².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.