Periodic Table/Iridium/¹⁷²Ir

← 171Ir173Ir →

¹⁷²Ir

Iridium-172

Radioactive· Half-life: 4.40 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

77

Neutrons (N)

95

Mass Number (A)

172

Atomic Mass

171.970607AMU

Spin / Parity

3-

Binding E/A

7.652keV

Natural Abundance

Trace / None

Half-life

4.40 s

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

β⁺

98.0%

α

2.0%

Decay Chain

¹⁷²IrIridium4.40 s

β⁺98.0%

α¹⁶⁸Re2.00%

¹⁷²OsOsmium19.2 s

β⁺98.8%

α¹⁶⁸W1.19%

¹⁷²ReRhenium55.0 s

β⁺100.0%

¹⁷²WTungsten6.60 min

β⁺100.0%

¹⁷²TaTantalum36.8 min

β⁺100.0%

¹⁷²HfHafnium1.87 y

EC100.0%

¹⁷²LuLutetium6.70 d

β⁺100.0%

¹⁷²YbYtterbiumSTABLE

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

Other Isotopes of Iridium

163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205

← Back to IridiumData: IAEA NDS · ENSDF