High Spin States and Shape Coexistence in ~(134)Ce

High spin states in ~ ~134 Ce nucleus have been studied by using the heavy-ion induced reaction ~ ~122 Sn(~ ~16 O,4n) carried out at China Institute of Atomic Energy. The early level scheme has been extended with spin up to 22. However,our result is different from that in a recent publication,and the magnetic rotation bands reported there have not been confirmed. Our observed level structures may be interpreted as shape coexistence. The 10~+ state at the backbending with h_~11/2 quasineutron configuration has an oblate deformation with an asymmetry parameter γ≈-60°(Lund convention),and the 10~+ isomer is a yrast trap of prolate deformation with γ≈-120°,whereas the other signature partner bands with h_~11/2 and g_~7/2 proton configuration probably have a prolate deformation with γ≈0°.