Se

Selenium-81

Protons (Z)

34

Neutrons (N)

47

Mass number

81

Half-Life

18.45 m

Abundance

---

Mass

80.918 u

Mass Excess

-76,389.0 keV

Spin

1/2-

Discovered

1948

Binding energy per nucleon

8,686 keV

Neutron separation energy

6,701 keV

Proton separation energy

11,463 keV

Decay Mode

β⁻Bromine-81100%

Decay chain

Selenium-81Z 34 · N 4718.45 m
β⁻100%