  Two new methods to observe neutron radioactivity are presented. Both methods
rely on the production and decay of the parent nucleus in flight. The relative
velocity measured between the neutron and the fragment is sensitive to
half-lives between ~1 and ~100 ps for the Decay in Target (DiT) method. The
transverse position measurement of the neutron in the Decay in a Magnetic Field
(DiMF) method is sensitive to half-lives between 10 ps and 1 ns.
