Periodic Table/Promethium/¹⁵⁶Pm

← 155Pm157Pm →

¹⁵⁶Pm

Promethium-156

Radioactive· Half-life: 27.4 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

61

Neutrons (N)

95

Mass Number (A)

156

Atomic Mass

155.931114AMU

Spin / Parity

4+

Binding E/A

7.977keV

Natural Abundance

Trace / None

Half-life

27.4 s

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

β⁻

100.0%

Decay Chain

¹⁵⁶PmPromethium27.4 s

β⁻100.0%

¹⁵⁶SmSamarium9.40 h

β⁻100.0%

¹⁵⁶EuEuropium15.2 d

β⁻100.0%

¹⁵⁶GdGadoliniumSTABLE

4-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