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

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Abstract.

The 84Se nucleus has been produced as fission fragment in the fusion reaction 18O + 208Pb 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 ∼ 7ℏ. 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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Authors and Affiliations

  1. CSNSM, IN2P3-CNRS/Université Paris-Sud, 91405, Orsay, France

    A. Prévost, M. G. Porquet, A. Astier & I. Deloncle

  2. IReS, IN2P3-CNRS/Université Louis Pasteur, 67037, Strasbourg Cedex 2, France

    F. Azaiez, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, B. J. P. Gall, F. Khalfallah, I. Piqueras & M. Rousseau

  3. IPNL, IN2P3-CNRS/Université Claude Bernard, 69622, Villeurbanne Cedex, France

    M. Meyer, N. Redon & O. Stézowski

  4. INRNE, BAS, 1784, Sofia, Bulgaria

    Ts. Venkova

  5. CEA/Saclay, DSM/DAPNIA/SPhN, 91191, Gif-sur-Yvette Cedex, France

    R. Lucas

  6. JINR, Joliot-Curie 6, 141980, Dubna, Moscow region, Russia

    A. Bogachev

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  1. A. Prévost
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  2. M. G. Porquet
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  3. A. Astier
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  4. I. Deloncle
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  5. F. Azaiez
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  7. D. Curien
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  8. O. Dorvaux
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  9. G. Duchêne
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  10. B. J. P. Gall
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  11. F. Khalfallah
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  12. I. Piqueras
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  13. M. Rousseau
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  14. M. Meyer
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  15. N. Redon
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  16. O. Stézowski
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  17. Ts. Venkova
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  18. R. Lucas
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  19. A. Bogachev
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Prévost, A., Porquet, M.G., Astier, A. et al. Medium-spin excitations of the neutron-rich 84Se isotope: Possible decrease in energy of the N = 50 neutron-core excitation. Eur. Phys. J. A 22, 391–395 (2004). https://doi.org/10.1140/epja/i2004-10063-3

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  • DOI: https://doi.org/10.1140/epja/i2004-10063-3

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