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19C (1983AJ01)(Not illustrated) 19C has been observed in the 4.8 GeV proton bombardment of uranium: it is particle stable (1974BO05). The calculated mass excess of 19C is 32.45 MeV using the modified form of the IMME (1975JE02): 19C would then be stable with respect to decay into 18C + n by 0.53 MeV and into 17C + 2n by 4.72 MeV [see (1982AJ01) for the mass of 17C. See also (1978AJ03).
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