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A novel method to extract the $B(E1)$ strength of a weakly bound nucleus fromexperimental Coulomb dissociation data is proposed. The method makes use ofcontinuum discretized coupled channels (CDCC) calculations, in which bothnuclear and Coulomb forces are taken into account to all orders. This is acrucial advantage with respect to the standard procedure based on theEquivalent Photon Method (EPM) which does not properly take into accountnuclear distortion, higher order coupling effects, or Coulomb-nuclearinterference terms. The procedure is applied to the $^{11}$Be nucleus using twosets of available experimental data at different energies, for which seeminglyincompatible $B(E1)$ have been reported using the EPM. We show that the presentprocedure gives consistent $B(E1)$ strengths, thus solving the aforementionedlong-standing discrepancy between the two measurements.

physics letters b

Determining $B(E1)$ distributions of weakly bound nuclei from breakup  cross sections using Continuum Discretized Coupled Channels calculations.  Application to $^{11}$Be