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1n- and 2n-transfer with the Borromean nucleus $^{6}$He near the Coulomb barrier

Abstract : Angular distributions for 1n- and 2n-transfer are reported for the 6He + 65Cu system at Elab = 22.6 MeV. For the first time, triple coincidences between particles, neutrons and characteristic rays from the target-like residues were used to separate the contributions arising from 1n- and 2n-transfer. The differential cross sections for these channels, elastic scattering, and fusion were analyzed using a Coupled Reaction Channels approach. The large measured ratio of the 2n/1n cross section and the strong influence of 2n-transfer on other channels indicate that the di-neutron configuration of 6He plays a dominant role in the reaction mechanism.
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Submitted on : Friday, June 27, 2008 - 9:08:30 AM
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Avhishek Chatterjee, A. Navin, A. Shrivastava, S. Bhattacharyya, M. Rejmund, et al.. 1n- and 2n-transfer with the Borromean nucleus $^{6}$He near the Coulomb barrier. Physical Review Letters, American Physical Society, 2008, 101, pp.032701. ⟨10.1103/PhysRevLett.101.032701⟩. ⟨in2p3-00291201⟩



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