High-spin states in {sup 203}Rn

The high-spin structure of {sup 203}Rn has been investigated using two separate reactions. {gamma}-{gamma} coincidences were measured for the {sup 174}Yb({sup 34}S,5n) reaction at a beam energy of 167 MeV using the YRAST Ball array at the Wright Nuclear Structure Laboratory at Yale University. The {sup 168}Er({sup 40}Ar,5n) reaction at an energy of 188 MeV was also employed. In this experiment {gamma} rays were observed using the Gammasphere array in coincidence with the fragment mass analyzer at Argonne National Laboratory. The level scheme of {sup 203}Rn has been developed to spins of {approx}41/2{Dirac_h} and excitation energies of {approx}3 MeV. The high-spin decay is dominated by three sequences of {gamma} rays, and the possible configurations are discussed.