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20C (1983AJ01)
(Not illustrated)
20C has been observed in the fragmentation of 213 MeV/nucleon 48Ca by Be: it is particle stable (1981ST23). Assuming the mass excess of 20C to be 37.3 MeV [see (1978AJ03)], 20C is then stable with respect to 19 + n and 18C + 2n by 3.2 and 3.75 MeV, respectively [see 18C and 19C]. See also (1978AJ03) and (1978NA07, 1981KI04; theor.).