Nuclide reference
Ge-77 — Germanium-77
The half-life of Ge-77 is 11.3 h. Main decay mode: β⁻ decay to As-77 (100%).
Identification
- Element
- Germanium (Ge)
- Atomic number Z
- 32
- Mass number A
- 77
- State
- Radioactive
Key quantities
- Half-life
- 11.3 h
- Specific activity
- 1.333e+17 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.3 TBq / 0.3 TBq
- D-value (НП-067-24)
- 0.06 TBq
Decay modes
- β⁻ decay → As-77 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 264.44 | 53.9 |
| 211.03 | 30.83 |
| 215.5 | 28.62 |
| 416.33 | 21.83 |
| 558.02 | 16.06 |
| 367.4 | 14.01 |
| 714.35 | 7.169 |
| 631.82 | 6.953 |
| 1,085.19 | 6.048 |
| 1,368.4 | 3.342 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 2,070.7 | 20.5 |
| 1,512.7 | 18.5 | |
| 2,227.1 | 15.3 | |
| 702.36 | 8 |
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.