Db
Dubnium-257
Protons (Z)
105
Neutrons (N)
152
Mass number
257
Half-Life
2.3 s
Abundance
---
Mass
257.108 u
Mass Excess
100,150.0 keV
Spin
(9/2+)
Discovered
1985
Binding energy per nucleon
7,362 keV
Neutron separation energy
8,221 keV
Proton separation energy
1,361 keV
Decay Mode
- SF<6%
Decay chain
- DbDubnium-257Z 105 · N 1522.3 s
- α>94%
- α90%
- α75%
- β⁺51%
- β⁺64.7%
- EC99.88%
- 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%