Multiphonon and ``hot''-phonon Isovector Electric-Dipole Excitations

Details Multiphonon and ``hot''-phonon Isovector Electric-Dipole Excitations Multiphonon and ``hot''-phonon Isovector Electric-Dipole Excitations

1998-08-14

arxiv.org/abs/nucl-th/9808039v1

Annals Phys. 276 (1999) 111-119

Physics

Nuclear Physics

Nuclear Theory

6 pages, Latex, 1 figure available on request

Scientific paper

10.1006/aphy.1999.5925

We argue that a substantial increase in the cross section for Coulomb excitation in the region of the Double Giant Dipole Resonance should be expected from Coulomb excitation of excited states involved in the spreading of the one-phonon resonance, in a manifestation of the Brink-Axel phenomenon. This generates an additional fluctuating amplitude and a corresponding new term to be added incoherently to the usual cross-section. The appropriate extension of an applicable reaction calculation is considered in order to estimate this effect.

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