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We investigate the three-body Coulomb breakup of a two-neutron halo nucleus, 6He. Based on the α+n+n model, the three-body scattering states of 6He are described by using the combined methods of the complex scaling and the Lippmann-Schwinger equation. We calculate the breakup cross section, the two-dimensional energy distributions, and the invariant mass spectra for the E1 transition of 6He. We discuss the relations between the structures in these strengths and the n-n and α-n correlations of 6He. It is found that the 5He resonance in the final states contributes to make a low-energy enhancement of the strength. The n-n final-state interaction also contributes to enhance the strength globally. However, the ground-state correlations of 6He, such as a dineutron, are difficult to recognize in the strength because of the dominant effect of the final-state interaction

physical review. c. nuclear physics/physical review. c, nuclear physics

Two-neutron correlations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>in a Coulomb breakup reaction

Two-neutron correlations inHe6in a Coulomb breakup reaction