Th

Thorium-217m

Protons (Z)

90

Neutrons (N)

127

Mass number

217

Half-Life

141.0 ns

Abundance

---

Mass

217.014 u

Mass Excess

12,879.0 keV

Spin

(15/2-)

Discovered

1989

Binding energy per nucleon

7,687 keV

Neutron separation energy

5,491 keV

Proton separation energy

2,560 keV

Decay Mode

γThorium-217100%

Decay chain

Thorium-217Z 90 · N 127141.0 ns
γ100%
α100%
α87%
β⁺83%
β⁺96.1%
α99.546%
EC100%