R. Anthon Department of Physics, Faculty of Sciences and Mathematics, Mulawarman University, Samarinda 75123, Indonesia Indonesia
S. H. Intifadhah Department of Physics, Faculty of Sciences and Mathematics, Mulawarman University, Samarinda 75123, Indonesia Indonesia
E. R. Putri Department of Physics, Faculty of Sciences and Mathematics, Mulawarman University, Samarinda 75123, Indonesia Indonesia
Department of Physics