Structure of High Spin States in ^(87)Zr

Structure of high spin states in ^(87)Zr was studied through the reaction ^(59)Co(^(32)S,3pn)^(87)Zr at a beam energy of 118 MeV using in-beam γ-ray spectroscopic method.Measurement of γ-γ coincidence was performed,and directional correlation orientation ratios of someγrays were determined.The level scheme of ^(87)Zr was established up to spin(37/2^(+))and(43/2^(-)).Many previously unknown states have been observed.Comparison with neighboring isotones indicates that the effect of neutron on nuclear structure property is predominant compared to proton,and there is a tendency of reduction in band crossing frequency with increasing proton number.