Periodic Table/Promethium/¹²⁶Pm

127Pm →

¹²⁶Pm

Promethium-126

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

61

Neutrons (N)

65

Mass Number (A)

126

Atomic Mass

125.957327AMU

Spin / Parity

—

Binding E/A

7.761keV

Natural Abundance

Trace / None

Half-life

Unknown

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

β⁺

β⁺p

Decay Chain

¹²⁶PmPromethium?

β⁺

β⁺p¹²⁵Pr

¹²⁶NdNeodymium?

β⁺

β⁺p¹²⁵Ce

¹²⁶PrPraseodymium3.12 s

β⁺100.0%

β⁺p¹²⁵La

¹²⁶CeCerium51.0 s

β⁺100.0%

¹²⁶LaLanthanum54.0 s

β⁺100.0%

¹²⁶BaBarium1.67 h

β⁺100.0%

¹²⁶CsCesium1.64 min

β⁺100.0%

¹²⁶XeXenonSTABLE

8-step decay chain → stable · Primary path shown · branching ratios indicated

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