Levels in 223Th populated by α decay of 227U.

Levels in 223Th populated by the a decay of 227U were investigated using α-γ decay spectroscopy. The 227U isotope was produced in the fusion-evaporation reaction Ne22+Pb208 at the velocity filter separator for heavy-ion reaction products at Gesellschaft für Schwerionenforschung in Darmstadt (Germany). Several new excited levels and γ transitions were identified in 223Th. An improved α-decay scheme of 227U was suggested. The experimental α-decay energy spectrum of 227U was compared with the Monte Carlo simulation performed using the toolkit geant4. [ABSTRACT FROM AUTHOR]