Cluster structure in nuclei

Two topics of the cluster structure study are discussed. They are (1) α cluster condensed states, and (2) superdeformation and molecular states in 32S In the first topic, I show that the 3α microscopic cluster model wave functions which were obtained long time ago for the 12C second 0+ state are almost completely the same as single 3α condensate model wave functions. The α condensate model wave functions we used for this study are obtained by projecting out good angular momenta from intrinsic a condensate wave functions which are spatially deformed. It is found that the effect of deformation is not large for the present case of the 12C O2+ states in the sense that the obtained wave functions contain the spherical condensate components more than 90 %. In the second topic, I show from the AMD + GCM study that the superdeformed excited rotational band in 32S is the same as the 16O + 16O lowest molecular band. I explain that the AMD + GCM calculation gives not only the 16O + 16O lowest molecular band which is identified as the superdeformed excited band but also the 16O + 16O second and third lowest molecular bands whose excitation energies are higher than the lowest band by about 10 MeV and 20 MeV, respectively. I point out that the excitation energies of these three lowest bands are almost the same as those of the three lowest bands generated by the so-called 'unique optical potential' of the 16O + 16O scattering