short-lived nuclei using the in-flight method. Its principle, performance and instrumentation is
discussed. Recently, the facility was used in experiments studying the energetic location of
the d3/2–orbital in neutron-rich nuclei, which is of interest as it determines the location of the
neutron drip-line in the Oxygen isotopes. Its unexpected behavior has recently been
explained as a consequence of three-body forces [1]. We present the first results of these …