Detection Efficiency of a ToF Spectrometer from Heavy-Ion Elastic Recoil Detection

DE BARBARÁ, EZEQUIEL; NEGRI, AGUSTÍN E.; MARTÍ, GUILLERMO V.; ARAZI, ANDRÉS; CAPURRO, OSCAR A.; FERNÁNDEZ NIELLO, JORGE O.; FIGUEIRA, JUAN MANUEL; PACHECO, ALBERTO J.; FIMIANI, LETICIA; MINGOLLA, MARÍA GRISELDA; MARTINEZ HEIMANN, DIEGO; CARNELLI, PATRICIO FRANCISCO FLORENCIO

Santiago

Simposio; VIII Latin American Symposium on Nuclear Physics and Applications; 2009

Centro Latinoamericano de Física

The detection efficiency of a time-of-flight system based on two micro-channel plates (MCP) time zero detectors plus a conventional silicon surface barrier detector was obtained from heavy ion elastic recoil measurements (this ToF spectrometer is mainly devoted to measurements of total fusion cross section of weakly bound projectiles on different mass-targets systems). In this work we have used beams of 7-Li, 16-O, 32-S and 35-Cl to study the mass region of interest for its application to measurements fusion cross sections in the 6,7-Li+27-Al systems at energies around and above the Coulomb barrier (0.8 VB < E < 2.0 VB). As the efficiency of a ToF spectrometer is strongly dependent on the energy and mass of the detected particles, we have covered a wide range of the scattered particle energies with a high degree of accuracy at the lowest energies. The different experimental efficiency curves obtained in that way were compared with theoretical electronic stopping power curves on carbon foils and were applied.