Information on mass chains and nuclides

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¹⁸Be has not been observed. It is predicted to have a mass excess of 78.43 MeV: see (1978AJ03). ¹⁸Be is then unstable with respect to breakup into ¹⁶Be + 2n, ¹⁵Be + 3n, ¹⁴Be + 4n, ¹³Be + 5n, ¹²Be + 6n, ¹¹Be + 7n and ¹⁰Be + 8n by, respectively, 3.1, 3.0, 6.0, 3.1, 4.9, 1.8 and 1.3 MeV, using the masses for the residual nuclei adopted by (1985WA02, 1986AJ01, 1986AJ04). See also (1983ANZQ; theor.).