Periodic Table/Neptunium/²²⁶Np

← 225Np227Np →

²²⁶Np

Neptunium-226

Radioactive· Half-life: 35.0 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

93

Neutrons (N)

133

Mass Number (A)

226

Atomic Mass

226.035230AMU

Spin / Parity

—

Binding E/A

7.394keV

Natural Abundance

Trace / None

Half-life

35.0 ms

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

α

100.0%

β⁺

Decay Chain

²²⁶NpNeptunium35.0 ms

α100.0%

β⁺²²⁶U

²²²PaProtactinium3.80 ms

α100.0%

²¹⁸AcActinium1.00 μs

α100.0%

²¹⁴FrFrancium5.51 ms

α100.0%

²¹⁰AtAstatine8.10 h

β⁺99.8%

α²⁰⁶Bi0.17%

²¹⁰PoPolonium138 d

α100.0%

²⁰⁶PbLeadSTABLE

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