Nucleon Separation and Pairing Energies, Decay Energies, and Atomic Masses for

Abstract

A set of 45 precise determinations of doublet spacings in the mass spectra of rare-earth chlorides has been combined with existing nuclear reaction and decay Q values and atomic mass data in a least-squares adjustment of atomic mass differences. For nuclides in the region [Formula: see text] the following quantities have been calculated: separation energies for the last pair of neutrons and for the last neutron (S2n, Sn), the neutron pairing energy (Pn), separation energies for the last pair of protons and for the last proton (S2p, Sp), the proton pairing energy (Pp), Q values for α and β− decays, and the masses. The systematic variations of these quantities are illustrated and discussed.