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 P.O. Box 2340, D-76125 Karlsruhe, Germany
3. Commissariat à l’Energie Atomique, Centrale Phénix – Site de Marcoule, B.P. 17171 F-30207 Bagnols-sur-Cèze France