Information on mass chains and nuclides available on this website:

WWW TUNL

¹⁷B has been observed in the 4.8 GeV proton bombardment of uranium: it is particle stable and its ground state J^π is probably 3/2^- (BO74A). Its atomic mass excess is calculated to be 44.37 MeV (transverse form of the mass equation): it is then stable with respect to decay into ¹⁵B + 2n by 0.73 MeV (TH74, JE75). The E_β^-(max) for the decay to ¹⁷C would then be 23.3 MeV. See also (WA77) and (SE81C; theor.).