Fig. 1.

Relation between the ground-state energy of resonantly interacting, harmonically trapped atoms and the energy dependence of nuclear few-body reactions. Hammer and Son (1) show that if the ground-state energy of $N$ particles in a harmonic trap is $E_N=\mathrm{\Delta }\hslash \omega$ then the cross-section for the reaction $\gamma +A\to B+Nn$, where an incident photon, $\gamma$, knocks out $N$ neutrons from a neutron-rich nucleus, $A$, scales as $E_{Nn}^{\mathrm{\Delta }-5/2}$. For two particles $\mathrm{\Delta }=2$, and for three particles $\mathrm{\Delta }=4.27$ (6).