Abstract
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.
Original language | English |
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Pages (from-to) | 375-385 |
Number of pages | 11 |
Journal | Acta Physica Polonica B |
Volume | 28 |
Issue number | 1-2 |
State | Published - 1997 |
Externally published | Yes |