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20B (1978AJ03)(Not illustrated)
20B has not been observed. The mass excess is predicted to be 69.08 MeV (1974TH01). 20B is then unstable with respect to breakup into 19B + n by 0.9 MeV [see
19B]. See also (1976JA23, 1976WA18) and (1975BE31; theor.).
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