Pathway for the Production of Neutron-Rich Isotopes around the N = 126 Shell Closure

Abstract : Absolute cross sections for isotopically identified products formed in multinucleon transfer in the 136Xe + 198Pt system at ∼ 8 MeV=nucleon are reported. The isotopic distributions obtained using a large acceptance spectrometer demonstrated the production of the “hard-to-reach” neutron-rich isotopes for Z < 78 around the N = 126 shell closure far from stability. The main contribution to the formation of these exotic nuclei is shown to arise in collisions with a small kinetic energy dissipation. The present experimental finding corroborates for the first time recent predictions that multinucleon transfer reactions would be the optimum method to populate and characterize neutron-rich isotopes around N = 126 which are crucial for understanding both astrophysically relevant processes and the evolution of “magic” numbers far from stability.
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Submitted on : Monday, October 26, 2015 - 9:16:44 AM
Last modification on : Monday, June 24, 2019 - 10:22:03 AM

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Y.X. Watanabe, Y.H. Kim, S.C. Jeong, Y. Hirayama, N. Imai, et al.. Pathway for the Production of Neutron-Rich Isotopes around the N = 126 Shell Closure. Physical Review Letters, American Physical Society, 2015, 115 (17), pp.172503. ⟨10.1103/PhysRevLett.115.172503⟩. ⟨in2p3-01220280⟩

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