Аннотация
Neutron-removal cross-section ( σ -xn ) measurements of neutron-rich light nuclei were performed on the COMBAS fragment-separator with a multi-detector Si telescope at intermediate energies (22-34) MeV/nucleon. The removals of one neutron from 8 Li and 9 Be, two neutrons from 6 He and 10 Be and four neutrons from 8 He were observed from the reactions on a Si-CsI(Tl) telescope. Results of σ -xn for 6 He, 8 He, 8 Li, 9 Be and 10 Be nuclei were obtained and compared with those of previously measured data. The data indicate that 4 He is a good core within 6 He and 8 He. Furthermore, we found that 9,10 Be nuclei disintegrated by one- and two- neutron removal reaction, respectively.