In

Indium-121

Protons (Z)

49

Neutrons (N)

72

Mass number

121

Half-Life

23.1 s

Abundance

---

Mass

120.908 u

Mass Excess

-85,835.0 keV

Spin

9/2+

Discovered

1960

Binding energy per nucleon

8,464 keV

Neutron separation energy

8,176 keV

Proton separation energy

9,167 keV

Decay Mode

β⁻Tin-121100%

Decay chain

Indium-121Z 49 · N 7223.1 s
β⁻100%
β⁻100%