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Medium-spin states in neutron-rich 83As and 81As

Abstract : The 83,81 As nuclei have been produced as fission fragments in the fusion reaction 18O + 208Pb at 85 MeV bombarding energy and studied with the Euroball array. Medium-spin states of 83,81 As have been established up to ∼3.5 MeV excitation energy. From angular correlation analysis, spin values have been assigned to most of the 81 As excited states. The behaviors of the yrast structures identified in this work are discussed in comparison with the general features known in the mass region. Then they are compared to the results of two theoretical approaches: the "rotor + quasiparticle" for 81 As and the shell model using the effective interactions JUN45 for 83,81 As.
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Submitted on : Wednesday, November 23, 2011 - 2:48:25 PM
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M.-G. Porquet, A. Astier, D. Verney, Ts. Venkova, I. Deloncle, et al.. Medium-spin states in neutron-rich 83As and 81As. Physical Review C, American Physical Society, 2011, 84, pp.054305. ⟨10.1103/PhysRevC.84.054305⟩. ⟨in2p3-00644045⟩

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