“…There are plenty of studies available on Z eff and N e of different materials for photon interaction (Baştuğ et al, 2010;Cevik et al 2008;Han et al 2012;Kucuk et al 2013;Kurudirek et al 2010Kurudirek et al , 2011Kurudirek and Topcuoglu, 2011;Manohara et al 2008aManohara et al , 2008bManohara et al , 2009Manjunatha and Rudraswamy, 2013;Manjunathaguru and Umesh, 2006;Mann et al, 2012;Önder et al, 2012;Polat and Icelli, 2010;Rudraswamy et al 2010;Shivaramu et al 2001;Singh and Badiger, 2014;Taylor et al 2012;Un and Demir, 2013). However, studies on Z eff and N e based on electron interactions are very scarce (Taylor et al, 2009;Guru Prasad et al, 1997;Parthasaradhi et al, 1989;Taylor, 2011;Kurudirek, 2014aKurudirek, , 2014b.…”