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USNDP

13Be (1976AJ04)


(Not illustrated)

13Be is not observed in the 5.5 GeV proton bombardment of uranium (1968PO04) nor in the bombardment of 232Th by 145 MeV 15N ions (1970AR27). 13Be is predicted to have an atomic mass excess of 35.35 MeV. It is then unstable with respect to decay into 12Be + n by 2.32 MeV (1974TH01). The modified mass equation leads to an amu of 34.60 MeV; 13Be would then be unstable with respect to decay into 12Be + n by 1.50 MeV (1975JE02). See also (1972TH13, 1973BA34, 1973KO1D, 1973VO1D, 1975BE31).