Ba
Barium-121
Protons (Z)
56
Neutrons (N)
65
Mass number
121
Half-Life
29.7 s
Abundance
---
Mass
120.924 u
Mass Excess
-70,740.0 keV
Spin
5/2+
Discovered
1975
Binding energy per nucleon
8,294 keV
Neutron separation energy
9,921 keV
Proton separation energy
4,140 keV
Decay Mode
Decay chain
- BaBarium-121Z 56 · N 6529.7 s
- β⁺99.98%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%