No abstract

The direct mass measurements of the neutron-rich nuclei 11Li, 14Be, a VB, 19-2~ 2~ 23 240, and 25 27 F have been performed using the Time-of-Flight Isochronous (TOFI) speetrometer. We observe a notable drop in the two-neutron separation energies for the oxygen and fluorine isotopes after N= 15. This behavior is interpreted using the shell model.

No abstract

No abstract

Cross-section measurements for neutron induced reactions on GaAs have been carried out at twelve different neutron energies from 7.5 to 15 MeV using the activation technique. The monoenergetic neutron beams were produced via the 2 H(d, n) 3 He reaction. GaAs samples were activated along with Au and Al monitor foils for determining the incident neutron flux. The induced activities of the reaction products were measured using high-resolution γ-ray spectroscopy. Cross-section for five reaction channels viz., 69 Ga(n, 2n) 68 Ga, 69 Ga(n, p) 69 Zn m , 71 Ga(n, p) 71 Zn m , 75 As(n, 2n) 74 As and 75 As(n, p) 75 Ge, are reported. The results are compared with the previous measurements and available data evaluations. Statistical-model calculations, based on the Hauser-Feshbach formalism, have been carried out using the TALYS and the COH3 codes and compared with the experimental results.