The interference between Coulomb and nuclear diffraction breakup mechanism is investigated for 11Be nucleus in single neutron knockout reaction. The investigation is performed for 12C, 40Ca and 208Pb targets at 40, 70 and 150 MeV/nucleon projectile beam energies. The Coulomb interaction between projectile and target is treated to all orders in sudden approximation and nuclear interaction by eikonal approximations. The effect of Coulomb diffraction interference on single neutron knockout cross section with different incident energies and its sensitivity towards target size (atomic number) are examined. The obtained results are quite informative for understanding the breakup mechanisms and helpful for a clear interpretation of 11Be breakup observables.
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