[1] European Synchrotron Facil, CNRS, Lab Cristallog, F-38042 Grenoble, France
[2] ESRF, CRG, D2AM, F-38042 Grenoble, France
[3] Ctr Phys Part, IN2P3, F-13288 Marseille, France
[4] LBNL, Berkeley, CA USA
[5] Inst Rech Subatom, CNRS, IN2P3, Strasbourg, France