Nb

Niobium-99m

Protons (Z)

41

Neutrons (N)

58

Mass number

99

Half-Life

2.5 m

Abundance

---

Mass

98.912 u

Mass Excess

-81,970.0 keV

Spin

1/2-

Discovered

1960

Binding energy per nucleon

8,575 keV

Neutron separation energy

6,516 keV

Proton separation energy

7,977 keV

Decay Mode

Decay chain

Niobium-99Z 41 · N 582.5 m
β⁻100%
β⁻100%
β⁻100%