A netron halo in 8He

Abstract

The structure of ${}^8$He is investigated within a three-cluster microscopic model. The three-cluster configuration $\alpha {+}^{2}n{+}^{2}n$ was used to describe the properties of the ground state of the nucleus. The obtained results evidently indicate the existence of a neutron halo in ${}^8$He.

Comments: 14 pages, 6 postscript figures, submitted to Phys. Atom. Nucl