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

E. DE BARBARÁ; A. E. NEGRI; G. V. MARTÍ; A. ARAZI; O. A. CAPURRO; J. O. FERNÁNDEZ NIELLO; J. M. FIGUEIRA; A. J. PACHECO; L. FIMIANI,; M. G. MINGOLLA; D. MARTINEZ HEIMANN; P. F. F. CARNELLI

Simposio; VIII LATIN AMERICAN SYMPOSIUM ON NUCLEAR PHYSICS AND APPLICATIONS; 2010

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 7Li, 16O, 32S and 35Cl to study the mass region of interest for its application to measurements fusion cross sections in the 6,7Li+27Al systems at energies around and above the Coulomb barrier (0.8VB ≤ E ≤ 2.0VB). 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.