@article{JRC28788, address = {}, year = {2005}, author = {Mortreau P and Berndt R}, abstract = {Abstract not available }, title = {Attenuation of a Non-Parallel Beam of Gamma Radiation by Thick Shielding. Application to the Determination of the 235U Enrichment with NaI Detectors.}, type = {}, url = {}, volume = {}, number = {}, journal = {Nuclear Instruments and Methods in Physics Research}, pages = {}, issn = {}, publisher = {}, doi = {} }