The total binding energy of the doubly closed shell nuclide 13250Sn82

Using the OSIRIS facility, mass-separated samples containing ¹³²Sb and ¹³²Sn have been prepared, and β-spectra in coincidence with different γ-gates have been recorded. Total decay energies and mass excesses are deduced for these isotopes. The total binding energy of the doubly closed shell nuclide ₅₀¹³²Sn₈₂, is compared to Hartree-Fock calculations using different sets of parameters of the Skyrme effective interaction. The predictions are 2.4 to 3.8 MeV off. This puts doubts on the reliability of calculations of nuclear properties far off the stability valley carried out with these sets of parameters.