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 / M., Cinausero; N., Gelli; G., Viesti; F., Lucarelli; D., Bazzacco; P. F., Bortignon; Brondi, Augusto; D., Fabris; E., Farnea; E. M., Fiore; L., Fiore; E., Fioretto; B., Fornal; LA RANA, Giovanni; M., Lunardon; D. R., Napoli; G., Nebbia; V., Paticchio; G., Prete; C. R., Alvarez; C. A., Ur; Vardaci, Emanuele. - In: NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA. A, NUCLEI, PARTICLES AND FIELDS. - ISSN 1826-9869. - STAMPA. - 111:6-7(1998), pp. 613-619.
Giant dipole emission in N/Z asymmetric heavy-ion reactions
BRONDI, AUGUSTO;LA RANA, GIOVANNI;VARDACI, EMANUELE
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.