Periodic Table/Promethium/¹²⁷Pm

← 126Pm128Pm →

¹²⁷Pm

Promethium-127

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

61

Neutrons (N)

66

Mass Number (A)

127

Atomic Mass

126.951358AMU

Spin / Parity

3/2+

Binding E/A

7.807keV

Natural Abundance

Trace / None

Half-life

Unknown

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

β⁺

p

Decay Chain

¹²⁷PmPromethium?

β⁺

p¹²⁶Nd

¹²⁷NdNeodymium1.80 s

β⁺100.0%

β⁺p¹²⁶Ce

¹²⁷PrPraseodymium4.20 s

β⁺100.0%

¹²⁷CeCerium34.0 s

β⁺100.0%

¹²⁷LaLanthanum5.10 min

β⁺100.0%

¹²⁷BaBarium12.7 min

β⁺100.0%

¹²⁷CsCesium6.25 h

β⁺100.0%

¹²⁷XeXenon36.3 d

EC100.0%

¹²⁷IIodineSTABLE

9-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