Simulated mixed absorbers and effective atomic numbers for γ attenuation Nair, K. Karunakaran ; Ramachandran, N. ; Abdullah, K. K. ; Varier, K. M. Abstract Publication: Pramana Pub Date: September 2006 DOI: 10.1007/s12043-006-0010-4 Bibcode: 2006Prama..67..501N