Gamma-ray shielding features of lithium borate glass doped with Ag, Cd and Zn using Phy-X program Mario César Pérez Chávez; Janet Alejandra Elías Ángel; Christian Gómez-Solís; Ramón Castañeda-Priego; Héctor René Vega Carrillo; Modesto Antonio Sosa Aquino; Miguel Ángel Vallejo Hernández;