1 research outputs found
Isospin mixing and energy distributions in three-body decay
The structure of the second 2 resonance in Li is investigated with
special emphasis on its isospin 0 components. The wave functions are computed
in a three-body model (++) using the hyperspherical adiabatic
expansion method combined with complex scaling. In the decay into three free
particles the symmetry conserving short-range interaction dominates at short
distance whereas the symmetry breaking Coulomb interaction dominates at
intermediate and large distances resulting in substantial isospin mixing. We
predict the mixing and the energy distributions of the fragments after decay.
Computations are consistent with available experiments. We conjecture that
nuclear three-body decays frequently produce such large isospin mixing at large
distance where the energy distributions. are determined.Comment: 5 pages, 4 figures, to be published in Physics Letters