Browsing by Author "Guesmia, A."

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Electronic stopping power data of heavy ions in polymeric foils in the ion energy domain of LSS theory
(Elsevier, 2015) Dib, A.; Ammi, H.; Hedibel, M.; Guesmia, A.; Mammeri, S.; Msimanga, M.; Pineda-Vargas, C.A.
Energy loss measurements of 63Cu, 28Si and 27Al heavy ions crossing thin Polyvinylchloride (PVC) foil
(Elsevier, 2015) Dib, A.; Ammi, H.; Guesmia, A.; Msimanga, M.; Mammeri, S.; Hedibel, M.; Guedioura, B.; Pineda-Vargas, C.A.
Experimental stopping data of, 63Cu, 28Si and 27Al heavy ions in thin Polyvinylchloride (H3C2Cl1) foil have been obtained over the 0.045-0.50MeV/nucleon energy range. The measured energy losses were carried out by Heavy Ion Elastic Recoil Detection Analysis (HI-ERDA) technique coupled with time of flight (ToF) spectrometer. A continuous stopping power data obtained in this work are well fitted by our proposed semi-empirical formula and the results are compared to those calculated by LSS formula or generated by SRIM-2013 and MSTAR predictions. Calculations using our formula agree well with the obtained experimental stopping powers, while the LSS formula underestimates the experimental data in the whole investigated energy range. In this work a simple expression for electronic stopping power of heavy ions at low energy in solid targets is introduced. This formula is based on the Firsov and Lindhard-Sharff stopping power models with a small modification made to the original expression, by incorporating the effective charge of moving ions concept and with exponential fit function
Energy loss straggling data of 28Si, 27Al, 24Mg, 19F, 16O, and 12C heavy ions in thin polymeric formvar foil over a range of energies 0.1–0.6 MeV/u by time-of-flight spectrometry
(Elsevier, 2015) Guesmia, A.; Ammi, H.; Msimanga, M.; Dib, A.; Mammeri, S.; Pineda-Vargas, C.A.; Hedibel, M.
Semi empirical formula for electronic stopping power determination of 24Mg, 27Al and 28Si ions crossing formvar foil in the ion energy domain of LSS theory
(2014) Guesmia, A.; Ammi, H.; Mammerib, S.; Dib, A.; Pineda-Vargas, C.A.; Msimanga, M.; Hedibel, M.
Slowing down of 2-11 MeV C-12, O-16, Si-28 and Cu-63 heavy ions through Si3N4 thin foil by using Time-of-Flight spectrometry
(2016) Guesmia, A.; Msimanga, M.; Pineda-Vargas, C. A.; Ammi, H.; Dib, A.; Mammeri, S.
The stopping force and the energy-loss straggling of Cu-63, Si-28, O-16 and C-12 partially stripped heavy ions crossing silicon nitride foil has been determined over a continuous range of energies 2-11 MeV, by using a method based on the Heavy Ion-Elastic Recoil Detection Analysis (HI-ERDA) technique using a Time of Flight (ToF) spectrometer. The obtained energy loss straggling values corrected for non-statistical straggling and the thickness variation using the Besenbacher's method have been analyzed and compared with the corresponding computed values. For computed electronic straggling we have used alternatively the widely used formulations such as, the universal Bohr straggling deduced from the Bohr stopping model, and the Lindhard-Scharff formula including the Bunching effect given by Hvelplund-Firsov formula according to the Besenbacher approach. The aim of such comparison is to check the reliability and accuracy of the existing energy loss straggling formulations, in the light of the present experimental results. The experimental results of energy loss straggling of all ions are found to be greater than those predicted by the Bohr stopping model or Lindhard-Scharff prediction model. The introduction of the bunching effect improves, the comparison and gives an estimation of other effects such as charge exchange. (C) 2015 Elsevier B.V. All rights reserved.