2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/176807Excited states in 40Si have been established by detecting gamma-rays coincident with inelastic scattering and nucleon removal reactions on a liquid hydrogen target. The low excitation energy, 986(5) keV, of the 2+[1] state provides evidence of a weakening in the N=28 shell closure in a neutron-rich nucleus devoid of deformation-driving proton collectivity.accepted for publication in PRLNuclear Experimenttext