We have measured the high-energy gamma-ray spectra from the fusion reactions 130 MeV O-16 + Mo-98 and 240 MeV Ti-48 + Ni-64, populating the Sn-114 and Sn-112 compound nuclei at the excitation energy of 110 MeV. The comparison of the spectra shows a similar to 36% enhancement of the gamma-ray yield in the Giant Dipole Resonance region (E gamma greater than or equal to 8 MeV) when the O-16-induced reaction is considered. This enhancement is interpreted as due to entrance channel effects related to the N/Z asymmetry between the target and the projectile.
Giant dipole emission in N/Z asymmetric heavy-ion reactions
VIESTI, GIUSEPPE;LUNARDON, MARCELLO;
1998
Abstract
We have measured the high-energy gamma-ray spectra from the fusion reactions 130 MeV O-16 + Mo-98 and 240 MeV Ti-48 + Ni-64, populating the Sn-114 and Sn-112 compound nuclei at the excitation energy of 110 MeV. The comparison of the spectra shows a similar to 36% enhancement of the gamma-ray yield in the Giant Dipole Resonance region (E gamma greater than or equal to 8 MeV) when the O-16-induced reaction is considered. This enhancement is interpreted as due to entrance channel effects related to the N/Z asymmetry between the target and the projectile.
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