List of Articles Parallelepiped sources Open Access Article Abstract Page Full-Text 1 - Calculation of full-energy peak efficiency of NaI (Tl) detectors by new analytical approach for parallelepiped sources Ahmed M El-Khatib Mohamed S Badawi Mona M Gouda Slobodan I Jovanovic Aleksandar D Dlabac Nikola N Mihaljevic Sherif S Nafee Ekram A El-Mallah 10.1186/2251-7235-7-52