1. Department
of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
2. Department
of Radiation Physics, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), Nasr City, Cairo 11787, Egypt
3. Department
of Electrical Engineering, University of California, Santa Cruz, California 95064, United States
4. Department
of Polymer Chemistry, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), Nasr City, Cairo 11787, Egypt
5. Department
of Physics, University of California, Santa Cruz, California 95064, United States