The γ-ray emission from the dynamical dipole formed in heavy-ion collisions during the process leading to fusion was measured for the N/Z asymmetric reaction 16O + 116Sn at beam energies of 8.1 and 15.6 MeV/nucleon. High-energy γ-rays and charged particles were measured in coincidence with the heavy recoiling residual nuclei. The data are compared with those from the N/Z symmetric reaction 64Ni + 68Zn at bombarding energies of 4.7 and 7.8 MeV/nucleon, leading to the same CN with the same excitation energies as calculated from kinematics. The measured yield of the high-energy γ-rays from the 16O-induced reaction is found to exceed that of the thermalized CN and the excess yield increases with bombarding energy. The data are in rather good agreement with the predictions for the dynamical dipole emission based on the Boltzmann–Nordheim–Vlasov model. In addition, a comparison with existing data in the same mass region is performed to extract information on the dipole moment dependence.

Excitation of the dynamical dipole in the charge asymmetric reaction 16O+ 116Sn / A. Corsi, O. Wieland, V.L. Kravchuk, A. Bracco, F. Camera, G. Benzoni, N. Blasi, S. Brambilla, F.C.L. Crespi, A. Giussani, S. Leoni, B. Million, D. Montanari, A. Moroni, F. Gramegna, A. Lanchais, P. Mastinu, M. Brekiesz, M. Kmiecik, A. Maj, M. Bruno, M. D’Agostino, E. Geraci, G. Vannini, S. Barlini, G. Casini, M. Chiari, A. Nannini, A. Ordine, M. Di Toro, C. Rizzo, M. Colonna, V. Baran. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 679:3(2009), pp. 197-202.

Excitation of the dynamical dipole in the charge asymmetric reaction 16O+ 116Sn

A. Corsi;A. Bracco;F. Camera;F.C.L. Crespi;S. Leoni;D. Montanari;
2009

Abstract

The γ-ray emission from the dynamical dipole formed in heavy-ion collisions during the process leading to fusion was measured for the N/Z asymmetric reaction 16O + 116Sn at beam energies of 8.1 and 15.6 MeV/nucleon. High-energy γ-rays and charged particles were measured in coincidence with the heavy recoiling residual nuclei. The data are compared with those from the N/Z symmetric reaction 64Ni + 68Zn at bombarding energies of 4.7 and 7.8 MeV/nucleon, leading to the same CN with the same excitation energies as calculated from kinematics. The measured yield of the high-energy γ-rays from the 16O-induced reaction is found to exceed that of the thermalized CN and the excess yield increases with bombarding energy. The data are in rather good agreement with the predictions for the dynamical dipole emission based on the Boltzmann–Nordheim–Vlasov model. In addition, a comparison with existing data in the same mass region is performed to extract information on the dipole moment dependence.
Fusion dynamics; Giant Dipole Resonance; Symmetry term of the equation of state
Settore FIS/04 - Fisica Nucleare e Subnucleare
2009
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/150931
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 41
  • ???jsp.display-item.citation.isi??? 36
social impact