Rensselaer Radiation Measurement Dosimetry Group (RRMDG) attn: Dr. George Xu(CCHP contact person) Room 1-11, NES Bldg., Tibbits Ave. Rensselaer Polytechnic Institute Troy, New York 12180 USA Phone: (518) 276 - 4014 Fax: (518) 276 - 4832 E-mail: xug2@rpi.edu