Alpha gas state in 36Ar*

The $\alpha$ cluster structures in light nuclei with N=Z are expected to appear abov the threshold energy of breakup into $\alpha$ particles. After the proposal of an $\alpha$ cluster wave function with $\alpha$ particle condensate type, such condensate states are both theoretically and experimentally discussed extensively. Theoretically, the existence of dilute $\alpha$ cluster state in nuclei with mass region of A$>$16, experimentally, is not confirmed for N-$\alpha$ cluster states in nuclei heavier than A=16. Recently, we measured $\alpha$ inelastic scattering of $^{36}$Ar followed by $\alpha$ decay in an inverse kinematics setup. A 50 MeV/u $^{36}$Ar beam from RCNP ring cyclotron was used to bombard a $^{4}$He gas target. $\alpha$ particles were detected in the magnetic spectrometer LAS which was set at 0 degrees. $\alpha$