http://myais.fsktm.um.edu.my/985/ Monte Carlo Computational Simulation of Neutron Activation of Materials Lam, Y. W., Wong, C. S., Ratnavelu, K., Q Science, Computer Science A Monte Carlo computational simulation technique is implemented in GEANT4 object-oriented architecture with ENDF/B VI cross section data. It is used to describe the attenuation and activation of neutron with various materials (lead, aluminium, lithium and ethanol). The neutron inelastic, elastic and capture processes will be considered in the simulation. The simulated cross sections are compared with the Breit-Wigner distribution, which is used in ENDF/B VI and gamma (γ) energy spectrum of materials will be cumulated as the basic data for material identification. Malaysian Institute of Physics (IFM) 2003-12 Journal PeerReviewed http://eprints.ictp.it/204/ Lam, Y. W., and Wong, C. S., and Ratnavelu, K., (2003) Monte Carlo Computational Simulation of Neutron Activation of Materials. Jurnal Fizik Malaysia, 24 (3 & 4). pp. 145-149. ISSN 0128-0333 http://myais.fsktm.um.edu.my/985/