Study of the N  =  50 major shell effect close to 78Ni : First evidence of a weak coupling structure in 8332Ge51and three-proton configuration states in 8131Ga50

doi:10.1088/1742-6596/49/1/038

Study of the N = 50 major shell effect close to 78Ni : First evidence of a weak coupling structure in ⁸³₃₂Ge₅₁and three-proton configuration states in ⁸¹₃₁Ga₅₀

D Verney et al 2006 J. Phys.: Conf. Ser. 49 170-171 doi: 10.1088/1742-6596/49/1/038

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D Verney, F Ibrahim, O Perru, O Bajeat, C Bourgeois, M Ducourtieux, C Donzaud, S Essabaa, S Galès, L Gaudefroy, D Guillemaud-Mueller, F Hammache, C Lau, H Lefort, F Le Blanc, A C Mueller, F Pougheon, B Roussière, J Sauvage and O Sorlin
Institut de Physique NucléLeaire, 15 rue Georges Clemenceau, 91406 Orsay, France
E-mail: verney@ipno.in2p3.fr (D Verney)

Abstract. New levels were attributed to ⁸¹₃₁Ga₅₀ and ⁸³₃₂Ge₅₁ which were fed by the β-decay of their respective mother nuclei ⁸¹₃₀Zn₅₁ and ⁸³₃₁Ga₅₂ produced by fission at the "PARRNe" ISOL set-up installed at the Tandem accelerator of the Institut de Physique NucléLeaire, Orsay. We show that the low energy structure of ⁸¹₃₁Ga₅₀ and ⁸³₃₂Ge₅₁ can easily be explained within the natural hypothesis of a strong energy gap at N = 50 and a doubly-magic character for ⁷⁸Ni.

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Study of the N = 50 major shell effect close to 78Ni : First evidence of a weak coupling structure in ⁸³₃₂Ge₅₁and three-proton configuration states in ⁸¹₃₁Ga₅₀

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