STUDY OF NEUTRON RICH NUCLEUS 25F VIA SINGLE-STEP FRAGMENTATION

The structure of nucleus F-25 was studied by use of in-beam gamma-ray spectroscopy of the fragmentation of a S-36 beam. The emitted gamma rays were detected by BaF2 detectors. In the gamma-ray spectrum obtained a wide bump between 3 and 4.5 MeV energy was observed corresponding to a set of gamma rays, including their first and second escape peaks. In order to resolve the peaks and to determine the high-energy structure of F-25, the experimental spectra were compared to Geant4 simulations taking the complex line shape into account. The observed decomposition of the bump is in good agreement with the results of the two-step fragmentation experiment [Zs. Vajta et al., submitted to Phys. Rev. C[. Furthermore, an additional transition was observed at 2140(30) keV. DOI:10.5506/APhysPolB.44.553