RETRACTED: Nuclear Materials IV

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). rticle has been retracted at the request of the Publisher. ocument was mistakenly published instead of the editorial of this special issue. The correct editorial is published in J. Nucl. Mater., 419 (2011) 398, http://dx.doi.org/10.1016/j.jnucmat.2011.11.033. Apologies are offered to the guest editors and to readers of the Journal that this error was not detected during the production process.