Periodic Table/Promethium/¹³⁷Pm

← 136Pm138Pm →

¹³⁷Pm

Promethium-137

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

61

Neutrons (N)

76

Mass Number (A)

137

Atomic Mass

136.920480AMU

Spin / Parity

5/2-

Binding E/A

8.036keV

Natural Abundance

Trace / None

Half-life

Unknown

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

β⁺

Decay Chain

¹³⁷PmPromethium?

β⁺

¹³⁷NdNeodymium38.5 min

β⁺100.0%

¹³⁷PrPraseodymium1.28 h

β⁺100.0%

¹³⁷CeCerium9.00 h

β⁺100.0%

¹³⁷LaLanthanum60.0 ky

EC100.0%

¹³⁷BaBariumSTABLE

6-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