Ba
Barium
Z = 56 · Alkaline Earth Metal · 137.3 u
Nuclear Engineering Significance
Fission product in the mass ~137-144 range. Ba-140 (t₁/₂ = 12.75 d) and its daughter La-140 are used for fission rate measurements and burnup determination. Barium is also a component of specialized high-density shielding concretes.
Basic properties
- Atomic number (Z)
- 56
- Standard atomic mass
- 137.3 u
- Category
- Alkaline Earth Metal
Isotopes & cross-section data
| Isotope | Mass (A) | Half-life | ZAID | Libraries |
|---|---|---|---|---|
| Ba-138 | 138 | Stable | .80c.71c |