1 research outputs found
Coulomb fragmentation and Coulomb fission of relativistic heavy-ions and related nuclear structure aspects
The Coulomb excitation of 208Pb projectiles has been studied at an
energy of 640 A MeV. Cross sections for the excitation of the two-phonon
giant dipole resonance were measured for different targets, and show clear
evidence for a two-step electromagnetic excitation mechanism. The experimental
cross sections exceed those calculated in the harmonic oscillator
approximation by a factor of 1.33 ± 0.16. The deduced 27-decay probability
is consistent with the expectation in the harmonic limit. Finally, the
excitation of the two-phonon giant dipole resonance in the deformed and
fissile nucleus 238U is discussed