Institution: | a Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan b Gesellschaft for Schwerionenforschung (GSI), Planckstr., Darmstadt D-64291, Germany c Advanced Photon Research Center, JAERI, 8-1 Umemi-dai, Kizu, Kyoto 619-0215, Japan d Medical Department, Kitazato University, Sagamihara, Kanagawa 228-8555, Japan e Institute of Optics and Quantum Electronics, University of Jena, Max-Wien-Platz, Jena 07743, Germany |