Abstract
We investigate the effects of higher order multipole transitions, inparticular electric quadrupole (E2) and E1–E2 interference, on theCoulomb dissociation of 19C within the framework of the firstorder eikonal approximation. The sensitivity of the total Coulombbreakup cross section and the longitudinal momentum distribution of thecore fragment to these effects are checked. The breakup occurspredominately through the dipole transition and the contribution of E2transition to the total cross section is found to be within the rangefrom 1 to 3% of that of E1. It is further observed that the E1–E2interference term contributes nothing to the integrated cross section.On the other hand, the longitudinal momentum distribution is observedto be insensitive to the E2 transition while the E1–E2 interferenceintroduces a small asymmetry in its shape.
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