Periodic Table/Lanthanum/¹⁵⁷La

← 156La

¹⁵⁷La

Lanthanum-157

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

57

Neutrons (N)

100

Mass Number (A)

157

Atomic Mass

156.968792AMU

Spin / Parity

1/2+

Binding E/A

7.787keV

Natural Abundance

Trace / None

Half-life

Unknown

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

β⁻

β⁻n

Decay Chain

¹⁵⁷LaLanthanum?

β⁻

β⁻n¹⁵⁶Ce

¹⁵⁷CeCerium175 ms

β⁻100.0%

β⁻n¹⁵⁶Pr

¹⁵⁷PrPraseodymium307 ms

β⁻100.0%

β⁻n¹⁵⁶Nd

¹⁵⁷NdNeodymium1.15 s

β⁻100.0%

¹⁵⁷PmPromethium10.6 s

β⁻100.0%

¹⁵⁷SmSamarium8.03 min

β⁻100.0%

¹⁵⁷EuEuropium15.2 h

β⁻100.0%

¹⁵⁷GdGadoliniumSTABLE

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

Other Isotopes of Lanthanum

116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157

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