Information on mass chains and nuclides available on this website:

WWW TUNL

¹⁹C has been observed in the 4.8 GeV proton bombardment of uranium. It is particle stable (BO74A). The calculated mass excess of ¹⁹C is 32.45 MeV using the modified form of the IMME (JE75): ¹⁹C would then be stable with respect to decay into ¹⁸C + n by 1.0 MeV and into ¹⁷C + 2n by 5.0 MeV. For other mass predictions see (TH74, JA76M, WA76L, WA77). See also (72AJ02), (CE72, GA72Q, TH72K, VO73M) and (BE75Q; theor.).