Light Particles (Z-Less-Than-Or-Equal-To-2) Emitted In Central Au+Au Collisions At 250 A Mev Beam Energy

Isotopes with Z less than or equal to 2 emitted in Au+Au collisions at 250 AMeV were detected during Phase I of the FOPI collaboration at SIS by an array of Delta E - E telescopes. Events were sorted using global variables measured by the main FOPI detector. The energy spectra of light isotopes emitted in selected-central collisions seem to rule out a pure thermal emission even for Z = 1 isotopes (at variance with the results of previous experiments).