N = 50 core excitation in ⁹⁵ ₄₂Mo₅₃ at high angular momentum

The excited states of ⁹⁵Mo have been investigated using the heavy-ion fusion-evaporation reaction ⁸²Se(¹⁸O, 5n) ⁹⁵Mo at the beam energies of 82 and 88 MeV. The level scheme of ⁹⁵Mo was revised and extended up to E ≈ 14 MeV and I^π = 55/2⁽−⁾ with 62 new γ-ray transitions and 30 new levels. The energy spectrum bears the signature of core breaking viz. presence of high energy γ transitions with E_γ ≃ 2 to 3 MeV around the highest observed excitation energy and angular momentum originating due to excitation of nucleons across the N = 50 core. The proposed level scheme is compared with large basis spherical shell model calculations within a model space including the proton orbitals (1 f₅/₂, 2p3/₂, 2p1/₂, 1g9/₂) and neutron orbits (1g9/₂, 1g7/₂, 2d₅/₂, 2d₃/₂, 3s₁/₂). Satisfactory agreement between the experimental observation and shell-model calculations suggests that cross-shell excitations are important up to the maximum spin observed in the current experiment.