Quadrupole Contribution to Two Neutron Removal in Heavy Ion Collisions
C. J. Benesh
Abstract
In this report, electric quadrupole corrections to the two neutron removal cross section measured in heavy ion collisions are estimated for 197Au and 59Co targets. The quadrupole process is assumed to proceed primarily through excitation of the giant isovector quadrupole resonance, which then decays by neutron emission. For 59Co, the contribution from E2 radiation is found to be small, while for 197Au we find the quadrupole contribution resolves the discrepancy between experiment and the simple predictions of the Weissacker-Williams virtual photon method.
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