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Weakly bound nuclei and break-up mechanism with or without transfer

Grant number: 16/04612-9
Support type:Regular Research Grants
Duration: July 01, 2016 - October 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Jose Roberto Brandão de Oliveira
Grantee:Jose Roberto Brandão de Oliveira
Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers:Juan Antonio Alcántara Núñez ; Kumar Raju Mukhi ; Leandro Romero Gasques ; Marcos Aurelio Gonzalez Alvarez ; Mauricio Moralles ; Nilberto Heder Medina ; Vinicius Antonio Bocaline Zagatto
Associated grant(s):17/50160-5 - Collaboration for the performance of experiments and development of instrumentation under the NUMEN and NC1 Projects, AP.R SPRINT

Abstract

The assemblage of new types of detectors for the measurement with weakly bound stable and radioactive beams is proposed. The experimental setups with these detectors, involving kinematic coincidence between charged particles and gamma rays, will allow the detailed investigation of the break-up mechanisms of weakly bound nuclei, which have a well known importance in atrophysical processes, besides the intrinsic interest of the fundamental physical problem of the scattering which involves coupling to states in the continuum. The experiments will be performed in the Pelletron Accelerator (IFUSP), with and without the use of the RIBRAS system for the prouction of radioactive beams. The project should initiate a promising research program in conection with other local projects and in international collaborations, with great tecnological challenges. The funding is requested for the assemblage of 2 LYSO(Ce) scintillator detectors with 3×3 pixels coupled to Silicon photomultipliers (SiPM), with sifficient energy resolution for the proposed measurements, and with large photopeak efficiency and relatively low cost, and ”E-E plastic (phoswich) scintillators with high granularity, also with SiPMs, which present high count-rate capabilities. We propose the measurement of the 7Li + 120Sn, 9Be + 154Sm, and 8Li + 154Sm reactions, among other possibilities, at energies around the barrier. The results should contribute to the devellopment of the theoretical models which aim the descripton of the processes and quantitative predictions of the cross sections. (AU)