Nuclide reference
N-12 — Nitrogen-12
The half-life of N-12 is 11 ms. Main decay mode: β⁺ decay / electron capture to C-12 (100%).
Identification
- Element
- Nitrogen (N)
- Atomic number Z
- 7
- Mass number A
- 12
- State
- Radioactive
Key quantities
- Half-life
- 11 ms
- Specific activity
- 3.162e+24 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
- β⁺ decay / electron capture → C-12 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 510.999 · annihilation 511 keV | 199.8 |
| 4,438.91 | 2.73 |
| 3,215.3 | 1.5 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 16,316 | 94.55 |
| 8,661.9 | 2.7 | |
| 11,877 | 1.898 | |
| 6,016.1 | 0.46 |
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.