Periodic Table/Promethium/¹⁶¹Pm

← 160Pm162Pm →

¹⁶¹Pm

Promethium-161

Radioactive· Half-life: 1.05 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

61

Neutrons (N)

100

Mass Number (A)

161

Atomic Mass

160.946230AMU

Spin / Parity

5/2-

Binding E/A

7.892keV

Natural Abundance

Trace / None

Half-life

1.05 s

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

β⁻

100.0%

β⁻n

Decay Chain

¹⁶¹PmPromethium1.05 s

β⁻100.0%

β⁻n¹⁶⁰Sm

¹⁶¹SmSamarium4.80 s

β⁻100.0%

¹⁶¹EuEuropium26.2 s

β⁻100.0%

¹⁶¹GdGadolinium3.65 min

β⁻100.0%

¹⁶¹TbTerbium6.95 d

β⁻100.0%

¹⁶¹DyDysprosiumSTABLE

6-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