two stage separator

two stage separator

The plots below, which show the distributions of particles observed from the same nuclear reaction at NSCL using a one-stage separator (top) and a two-stage separator (bottom), show the benefits of the new technique. The total number of particles arriving at the end is approximately the same in both cases. However, the proportion of unusual nuclei is much larger in the second case. For example, the two-stage separator enabled the detection of many more neutron-rich isotopes, such as those circled in red -- oxygen-24 (8 protons, 16 neutrons), fluorine-27 (9 protons, 18 neutrons) and fluorine-29 (9 protons, 20 neutrons).