On-beam calibration of the Delta E(Si)-Sci/PD charged particle telescope

The reaction products emitted in the N-14(45A Mev) + (CH2/CD2) interactions are identified by a DeltaE(Si)-E(Scintillator/Photodiode) telescope by the conventional DeltaE-E method. The position of "jumps" in the amplitude of the photodiode signal for ions passing through the scintillator (Sci) is us ed to calibrate on-beam both the DeltaE and the Sci/PD scales in MeV. The a ccuracy of an absolute energy calibration is better than 2.3% and 1.8% for CsI(TI) and GSO(Ce) detectors, respectively. It is defined mostly by the co rrectness of the range-energy relations of ions in the Si and Sci crystals. The light response function, L(E, Z, A), of isotopes up to Z(A) = 8(16) in the range of energy similar to (2.5-60)A Mev is extracted. The effects of doping concentration and pulse shaping on the light response are analyzed. The validity of the existing empirical light-energy relations is checked in a wide interval of ion energies and a new power law relation is proposed. Calculations of the response function based on the Murray-Mayer model are f ound to be in excellent agreement with experimental data for the CsI(TI) cr ystal. (C) 2001 Elsevier Science B.V. All rights reserved.