Periodic Table/Promethium/¹⁴⁹Pm

← 148Pm150Pm →

¹⁴⁹Pm

Promethium-149

Radioactive· Half-life: 2.21 d

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

61

Neutrons (N)

88

Mass Number (A)

149

Atomic Mass

148.918342AMU

Spin / Parity

7/2+

Binding E/A

8.052keV

Natural Abundance

Trace / None

Half-life

2.21 d

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

β⁻

100.0%

Decay Chain

¹⁴⁹PmPromethium2.21 d

β⁻100.0%

¹⁴⁹SmSamariumSTABLE

2-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