Nuclide reference
As-76 — Arsenic-76
The half-life of As-76 is 1.0933 d. Main decay mode: β⁻ decay to Se-76 (100%).
Identification
- Element
- Arsenic (As)
- Atomic number Z
- 33
- Mass number A
- 76
- State
- Radioactive
Key quantities
- Half-life
- 1.0933 d
- Specific activity
- 5.814e+16 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)
- 0.2 TBq
Decay modes
- β⁻ decay → Se-76 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 559.1 | 45 |
| 657.05 | 6.165 |
| 1,216.08 | 3.42 |
| 1,212.92 | 1.44 |
| 1,228.52 | 1.215 |
| 563.23 | 1.202 |
| 2,096.3 | 0.549 |
| 665.34 | 0.3645 |
| 2,110.8 | 0.3285 |
| 1,787.66 | 0.2925 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 2,962.6 | 51 |
| 2,403.5 | 35.2 | |
| 1,746.5 | 7.5 | |
| 1,175 | 1.77 |
For 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.