MICROSCOPIC REPRESENTATION OF ALPHA-CLUSTER MATTER .2.

Nuclear matter in the generator coordinate space is studied introducing the tetrahedral alpha-clusters in alpha-cluster matter. Whether the phase transition from alpha-cluster matter to nuclear matter takes place as the density of nucleons increases is investigated using two kinds of effective inter-nucleon forces. Though the physical quantities strongly depend upon the properties of the effective inter-nucleon force, the phase transition or the state close to the phase transition occurs in the nuclear interior. On the other hand, the surface never shows such a phase transition, and alpha-cluster matter is always more stable than nuclear matter. The calculated results thus indicate that alpha clusters float on the surface of nuclear matter.