[5] Li F,Gardner R P.Appl.Radiat Isotopes,2012,70(7):1243.
[7] Qiu Jingke,Deng Biao,Yang Qun,et al.Nuclear Instruments and Methods in Physics Research B,2011,269(22):2662.
[8] Fu Chen,Wang Nanping.Nuclear Science and Techniques,2010,21(4),214.
[9] Angeyo K H,Gari S,Mustapha A O,et al.Applied Radiation and Isotopes,2012,70(11):2596.
[10] Sabriye Seven.Radiation Physics and Chemistry,2012,81(5):489.