Search for high-spin isomsers using radioactive-isotope $^{17}$N beam

High spin isomers are known in $\it{N}$=83 isotones systematically. These isomers are considered to be shape isomers caused by sudden shape changes from near spherical to oblate shapes. In order to search for high-spin isomers in other mass regions, we selected $\it{N}$=51 isotones which have one neutron outside a magic 50 core and proton numbers close to semi-magic 40 core. High spin isomers of $\it{N}$=51 isotones can be expected, which have similar mechanism to those of N=83 isotones. An experiment for isomer search in $\it{N}$=51 isotones was performed using a $^{17}$N secondary beam produced by the low-energy radioisotope beam separator(CRIB) of the Center for Nuclear Study(CNS),University of Tokyo. A $^{9}$Be primary target of 2.3 mg/cm$^{2}$ was bombarded by an $^{18}$O$^{8+}$ primary beam of 126 MeV to obtain a $^{17}$N beam of 104 MeV. A $^{82}$Se secondary target of 4.9 mg/cm$^{2}$ was placed at a final focal plane. Two clover Ge detectors were set to measure $\gamma$ rays emitted from nuclei produced by the secondary fusion reaction. In this experimnet, some $\gamma$-rays from nuclei, such as $^{92}$Nb, produced by the $^{82}$Se+$^{17}$N reaction were observed. In this talk, I will report the result.