1. Central Research Institute of Electric Power Industry, Nuclear Technology Research Laboratory, 2-11-1 Iwado-kita, Komae-shi, Tokyo 201-8511, Japan
2. European Commission Joint Research Centre, Institute for Transuranium Elements Karlsruhe, Germany
3. Commissariat à l’Énergie Atomique, Centrale Phénix, 30200 Bagnols Sur Ceze, France