Periodic Table/Neptunium/²²⁷Np

← 226Np228Np →

²²⁷Np

Neptunium-227

Radioactive· Half-life: 510 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

93

Neutrons (N)

134

Mass Number (A)

227

Atomic Mass

227.034975AMU

Spin / Parity

5/2+

Binding E/A

7.398keV

Natural Abundance

Trace / None

Half-life

510 ms

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

α

100.0%

β⁺

Decay Chain

²²⁷NpNeptunium510 ms

α100.0%

β⁺²²⁷U

²²³PaProtactinium5.30 ms

α100.0%

β⁺²²³Th

²¹⁹AcActinium9.40 μs

α100.0%

β⁺²¹⁹Ra

²¹⁵FrFrancium90.0 ns

α100.0%

²¹¹AtAstatine7.21 h

EC58.2%

α²⁰⁷Bi41.8%

²¹¹PoPolonium516 ms

α100.0%

²⁰⁷PbLeadSTABLE

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

Other Isotopes of Neptunium

219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245

← Back to NeptuniumData: IAEA NDS · ENSDF