Periodic Table/Promethium/¹⁵⁹Pm

← 158Pm160Pm →

¹⁵⁹Pm

Promethium-159

Radioactive· Half-life: 1.49 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

61

Neutrons (N)

98

Mass Number (A)

159

Atomic Mass

158.939286AMU

Spin / Parity

5/2-

Binding E/A

7.931keV

Natural Abundance

Trace / None

Half-life

1.49 s

Decay Modesoverview · half-life · α · β⁻ · β⁺

β⁻

100.0%

Decay Chain

¹⁵⁹PmPromethium1.49 s

β⁻100.0%

¹⁵⁹SmSamarium11.4 s

β⁻100.0%

¹⁵⁹EuEuropium18.1 min

β⁻100.0%

¹⁵⁹GdGadolinium18.5 h

β⁻100.0%

¹⁵⁹TbTerbiumSTABLE

5-step decay chain → stable · Primary path shown

Other Isotopes of Promethium

126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165

← Back to PromethiumData: IAEA NDS · ENSDF