Periodic Table/Protactinium/²²⁷Pa

← 226Pa228Pa →

²²⁷Pa

Protactinium-227

Radioactive· Half-life: 38.3 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

91

Neutrons (N)

136

Mass Number (A)

227

Atomic Mass

227.028804AMU

Spin / Parity

5/2-

Binding E/A

7.435keV

Natural Abundance

Trace / None

Half-life

38.3 min

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

α

85.0%

EC

15.0%

Decay Chain

²²⁷PaProtactinium38.3 min

α85.0%

EC²²⁷Th15.0%

²²³AcActinium2.10 min

α99.0%

EC²²³Ra

²¹⁹FrFrancium22.5 ms

α100.0%

²¹⁵AtAstatine37.0 μs

α100.0%

²¹¹BiBismuth2.14 min

α100.0%

β⁻²¹¹Po0.28%

²⁰⁷TlThallium4.77 min

β⁻100.0%

²⁰⁷PbLeadSTABLE

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

Other Isotopes of Protactinium

211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241

← Back to ProtactiniumData: IAEA NDS · ENSDF