This is an internet site that can give immediate information regarding "Table of the Nuclides." http://hpngp01.kaeri.re.kr/CoN/index.html Sandy Perle Director, Technical Operations ICN Dosimetry Division Office: (800) 548-5100 Ext. 2306 Fax: (714) 668-3149 E-Mail: sandyfl@ix.netcom.com Homepages: http://www.netcom.com/~sandyfl/home.html http://www.geocities.com/CapeCanaveral/1205