Affiliation: | aDepartment of Applied Physics, Okayama University of Science, Ridai-Cho 1-1, Okayama 700-005, Japan bDépartement de Préhistoire du Muséum National d’Histoire Naturelle, UMR 5198 du CNRS, 1 rue René Panhard, 75013 Paris, France cIRD UR 055, Paléotropique, Centre de Recherche Ile de France, 32 Av Henri-Varagnat, 93143 Bondy Cedex, France dLaboratoire National Henri Becquerel, CEA/Saclay, 91191Gif-sur-Yvette, France |