Lr
Lawrencium-257
Protons (Z)
103
Neutrons (N)
154
Mass number
257
Half-Life
6.0 s
Abundance
---
Mass
257.099 u
Mass Excess
92,670.0 keV
Spin
(7/2-)
Discovered
1971
Binding energy per nucleon
7,397 keV
Neutron separation energy
7,151 keV
Proton separation energy
2,442 keV
Decay Mode
- SF
Decay chain
- LrLawrencium-257Z 103 · N 1546.0 s
- α100%
- β⁺~100%
- EC88%
- α~100%
- β⁻~100%
- α~100%
- α~100%
- β⁻~100%
- α~100%
- α~100%
- β⁻100%
- α~100%
- α100%
- β⁻100%
- α~100%
- α~100%
- α99.992%
- β⁻97.91%
- α100%
- β⁻100%
- α100%