NEUTRON HALO ROTATION IN 11Be AND 9Be AND MEASURING THE RADII OF NUCLEAR EXCITED STATES
The results of the experiment performed by Kurchatov – Tsukuba – Almaty collaboration at the tandem of Tsukuba University are presented. All the known states of 9Be up to the excitation energies ~ 12 MeV were observed. It is possible, all the low laying 9Be states could be decomposed into three rotational bands, each having cluster structure 8Be core plus a valence neutron in one of the orbits: p3/2-, s1/2+ and p1/2-.