1. Physics Department, Faculty of Sciences Semlalia, LMFE, UCA, Marrakesh, Morocco
2. LTI, UPJV, University Institute of Technology, Amiens, France
3. Physics Department, Faculty of Sciences and Technics, LGEM, SMSU, Béni-Mellal, Morocco
4. Physics Department, Faculty of Applied Sciences, Ait Melloul, Morocco