NEUTRON HALO ROTATION IN ¹¹Be AND ⁹Be AND MEASURING THE RADII OF NUCLEAR EXCITED STATES

Abstract

The results of the experiment performed by Kurchatov -Tsukuba -Almaty collaboration at the tandem of Tsukuba University are presented. All the known states of 9 Be up to the excitation energies ~ 12 MeV were observed. It is possible, all the low laying 9 Be states could be decomposed into three rotational bands, each having cluster structure 8 Be core plus a valence neutron in one of the orbits: p3/2-, s1/2+ and p1/2-.