Momentum distributions from three-body decaying 9Be and 9B resonances

Abstract

The complex-rotated hyperspherical adiabatic method is used to study the decay of low-lying ${}^9$Be and ${}^9$B resonances into $\alpha$, $\alpha$ and $n$ or $p$. We consider six low-lying resonances of ${}^9$Be ($1/2^{\pm }$, $3/2^{\pm }$ and $5/2^{\pm }$) and one resonance of ${}^9$B ($5/2^{-}$) to compare with. The properties of the resonances at large distances are decisive for the momentum distributions of the three decaying fragments. Systematic detailed energy correlations of Dalitz plots are presented.

Comments: 4 pages, 2 figures. Proceedings of the SOTANCP2 conference held in Brussels in May 2010