  The alpha+6He low-energy reactions and the structural changes of 10Be in the
microscopic alpha+alpha+N+N model are studied by the generalized two-center
cluster model with the Kohn-Hulthen-Kato variation method. It is found that, in
the inelastic scattering to the alpha+6He(2+) channel, characteristic
enhancements are expected as the results of the parity-dependent non-adiabatic
dynamics. In the positive parity state, the enhancement originates from the
excited eigenstate generated by the radial excitation of the relative motion
between two alpha-cores. On the other hand, the enhancement in the negative
parity state is induced by the Landau-Zener level-crossing. These non-adiabatic
processes are discussed in connection to the formation of the inversion doublet
in the compound system of 10Be.
