Periodic Table/Bismuth/¹⁹¹Bi

← 190Bi192Bi →

¹⁹¹Bi

Bismuth-191

Radioactive· Half-life: 12.4 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

83

Neutrons (N)

108

Mass Number (A)

191

Atomic Mass

190.985787AMU

Spin / Parity

9/2-

Binding E/A

7.579keV

Natural Abundance

Trace / None

Half-life

12.4 s

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

α

51.0%

β⁺

Decay Chain

¹⁹¹BiBismuth12.4 s

α51.0%

β⁺¹⁹¹Pb

¹⁸⁷TlThallium?

β⁺100.0%

α¹⁸³Au

¹⁸⁷HgMercury1.90 min

β⁺100.0%

α¹⁸³Pt

¹⁸⁷AuGold8.30 min

β⁺100.0%

α¹⁸³Ir

¹⁸⁷PtPlatinum2.35 h

β⁺100.0%

¹⁸⁷IrIridium10.5 h

β⁺100.0%

¹⁸⁷OsOsmiumSTABLE

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

Other Isotopes of Bismuth

184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224

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