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Medium-spin excitations of the neutron-rich $^{84}$Se isotope: Possible decrease in energy of the N = 50 neutron-core excitation

Abstract : The $^{84}$Se nucleus has been produced as fission fragment in the fusion reaction $^{18O} + ^{208}$Pb at 85MeV bombarding energy and studied with the Euroball IV array. Medium-spin states of this neutron-rich isotope have been identified for the first time. Its level scheme has been obtained up to 4.9MeV excitation energy and spin I sim 7plankv. Its structure is interpreted by analogy with those of the stable heavier isotones. The evolution of the energy of the N = 50 neutron-core excitation is discussed as a function of the proton number.
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Submitted on : Thursday, December 9, 2004 - 1:55:32 PM
Last modification on : Thursday, January 7, 2021 - 7:26:03 PM

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A. Prévost, M. G. Porquet, A. Astier, I. Deloncle, F. Azaiez, et al.. Medium-spin excitations of the neutron-rich $^{84}$Se isotope: Possible decrease in energy of the N = 50 neutron-core excitation. European Physical Journal A, EDP Sciences, 2004, 22, pp.391-395. ⟨10.1140/epja/i2004-10063-3⟩. ⟨in2p3-00023408⟩

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