1-7 Hollow Nuclear Matter

It is generally considered that an atomic nucleus is always compact.Based on the isospin-dependent Boltzmann nuclear transport model,here I show that large block nuclear matter or excited nuclear matter may both be hollow.Existence of hollow nuclear matter may have many implications in nuclear physics,astrophysics and some practical applications[1].Fig.1 shows the time evolution of the contour density distribution of the atomic nucleus 197 79 Au in X-Y plane with the Boltzmann nuclear transport model.