Periodic Table/Lanthanum/¹²⁹La

← 128La130La →

¹²⁹La

Lanthanum-129

Radioactive· Half-life: 11.6 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

57

Neutrons (N)

72

Mass Number (A)

129

Atomic Mass

128.912696AMU

Spin / Parity

3/2+

Binding E/A

8.130keV

Natural Abundance

Trace / None

Half-life

11.6 min

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

β⁺

100.0%

Decay Chain

¹²⁹LaLanthanum11.6 min

β⁺100.0%

¹²⁹BaBarium2.23 h

β⁺100.0%

¹²⁹CsCesium1.34 d

β⁺100.0%

¹²⁹XeXenonSTABLE

4-step decay chain → stable · Primary path shown

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