Periodic Table/Lanthanum/¹³⁸La

← 137La139La →

¹³⁸La

Lanthanum-138

Radioactive· Half-life: 103 Gy

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

57

Neutrons (N)

81

Mass Number (A)

138

Atomic Mass

137.907124AMU

Spin / Parity

5+

Binding E/A

8.164keV

Natural Abundance

8.8810%

Half-life

103 Gy

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

β⁺

65.5%

β⁻

34.5%

Decay Chain

¹³⁸LaLanthanum103 Gy

β⁺65.5%

β⁻¹³⁸Ce34.5%

¹³⁸BaBariumSTABLE

2-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

← Back to LanthanumData: IAEA NDS · ENSDF