Study of High-Spin States in neutron-rich Ti Isotopes

We have studied high-spin states of neutron-rich Ti isotopes $^{49-52}$Ti by using a fusion reaction of a secondary beam. The experiment was performed at RIPS facility in RIKEN. The secondary $^{46}$Ar beam was produced by a projectile fragmentation reaction of a $^{48}$Ca primary beam with 63 MeV/nucleon. By using aluminium degraders placed at the first and second focal planes, an energy of the secondary beam was reduced to 4.0$\pm$0.9 MeV/nucleon. The $^{46}$Ar beam was transported to the final focal plane and bombarded to a $^{9}$Be target in order to induce the secondary fusion reaction, $^{9}$Be($^{46}$Ar, $xn$)$^{55-x}$Ti. Gamma rays from the high-spin states of the reaction products $^{49-51}$Ti were detected by the GRAPE (Gamma-Ray detector Array with Position and Energy sensitivity) system. Based on excitation functions and $\gamma \gamma $-coincidence measurements, we have identified new high-spin states in $^{49}$Ti and $^{51}$Ti. In the present talk, we will report on the experimental results and discuss the newly observed high-spin states.