Pm
Promethium-142m
Protons (Z)
61
Neutrons (N)
81
Mass number
142
Half-Life
2.0 ms
Abundance
---
Mass
141.914 u
Mass Excess
-80,259.0 keV
Spin
(8-)
Discovered
1971
Binding energy per nucleon
8,300 keV
Neutron separation energy
7,807 keV
Proton separation energy
3,356 keV
Decay Mode
- γ→Promethium-142100%
Decay chain
- PmPromethium-142Z 61 · N 812.0 ms
- γ100%
- β⁺100%