Sr

Strontium-99

Protons (Z)

38

Neutrons (N)

61

Mass number

99

Half-Life

269.2 ms

Abundance

---

Mass

98.933 u

Mass Excess

-62,519.0 keV

Spin

3/2+

Discovered

1975

Binding energy per nucleon

8,403 keV

Neutron separation energy

4,168 keV

Proton separation energy

15,439 keV

Decay Mode

Decay chain

Strontium-99Z 38 · N 61269.2 ms
β⁻99.9%
β⁻98.23%
β⁻100%
β⁻100%
β⁻100%
β⁻100%