Y

Yttrium-99

Protons (Z)

39

Neutrons (N)

60

Mass number

99

Half-Life

1.48 s

Abundance

---

Mass

98.924 u

Mass Excess

-70,644.0 keV

Spin

5/2+

Discovered

1975

Binding energy per nucleon

8,477 keV

Neutron separation energy

6,426 keV

Proton separation energy

11,511 keV

Decay Mode

Decay chain

Yttrium-99Z 39 · N 601.48 s
β⁻98.23%
β⁻100%
β⁻100%
β⁻100%
β⁻100%