Secondary beams ( 6 Li, 7 Be, 8 B) were obtained by the separation of fragmentation products of a
15 N ion beam (50 MeV/A) impinging on a Be target using the COMBAS spectrometer. The secondary
products were detected by a telescope consisting of five Si-detectors (dE) and a stop CsI(Tl) detector.
The telescope allowed us to achieve unambiguous particle identification of fragments originating from
incident secondary beams as well as their reaction products resulting from interaction with the Si detectors,
chosen as a secondary target. This way, break-up reactions of 6 Li, 7 Be and 8 B have been studied in this
experiment, in particular the longitudinal momentum distributions of 7 Be fragments in the break-up of
8 B on a Si have been measured at 30 MeV/A.
