First observation of a rotational band in odd 50Sn nuclei: 111Sn.

摘要: Proton particle-hole excitations across the {ital Z}=50 closed shell are responsible for inducing low-lying prolate deformation in even-{sub 50}Sn nuclei. Although related rotational bands have been studied odd-{sub 51}Sb isotopes involving coupling of a valence proton, none had found Using {sup 96}Ru({sup 19}F,3{ital pn}) reaction, decoupled band has observed 111}Sn extending to spin-parity (67/2{sup {minus}}) and feeding out at 23/2{sup {minus}} into spherical states. This is interpreted as {nu}{ital h}{sub 11/2} orbital coupled deformed [({pi}{ital g}{sub 7/2}){sup 2}{direct_product}({pi}{ital 9/2}){sup {minus}2}] 110}Sn core. The extracted properties compared those 111}Sb with same