1. Siberian Division-Russian Academy of Sciences, Budker Institute of Nuclear Physics, Novosibirsk-630090, Russia
2. Russian Federal Nuclear Center, Institute of Technical Physics P.O. Box 245, 454070 Snezhinsk, Russia
3. 7 via Gregorio XIII, 00040-Monte Porzio Catone, Italy
4. Neutronics0Photonics R&D, 152 Harrison Avenue, Jersey City, New Jersey 07304-1906