Dynamical Dipole mode in heavy-ion fusion reactions

C. Parascandolo; D. Pierroutsakou; R. Alba; A. Del Zoppo; C. Maiolino; D. Santonocito; C. Agodi; V. Baran; A. Boiano; M. Colonna; R. Coniglione; E. De Filippo; M. Di Toro; U. Emanuele; F. Farinon; A. Guglielmetti; M. La Commara; B. Martin; C. Mazzocchi; M. Mazzocco; C. Rizzo; M. Romoli; C. Signorini; R. Silvestri; F. Soramel; E. Strano; D. Torresi; A. Trifirò; M. Trimarchi

doi:10.1051/epjconf/201716300043

Proceedings

Open Access

E3S Web of Conferences 163, 00043 (2017)
https://doi.org/10.1051/epjconf/201716300043

Dynamical Dipole mode in heavy-ion fusion reactions

C. Parascandolo¹^*, D. Pierroutsakou¹, R. Alba², A. Del Zoppo², C. Maiolino², D. Santonocito², C. Agodi², V. Baran³^,2, A. Boiano¹, M. Colonna², R. Coniglione², E. De Filippo⁴, M. Di Toro²^,5, U. Emanuele⁶, F. Farinon⁷, A. Guglielmetti⁸, M. La Commara⁹^,1, B. Martin⁹^,1, C. Mazzocchi⁸, M. Mazzocco¹⁰, C. Rizzo²^,5, M. Romoli¹, C. Signorini¹⁰, R. Silvestri⁹^,1, F. Soramel¹⁰, E. Strano¹⁰, D. Torresi¹⁰, A. Trifirò⁶ and M. Trimarchi⁶

¹ INFN - Napoli, Napoli, Italy
² INFN - LNS, Catania, Italy
³ University of Bucharest, Bucharest and NIPNE-HH, Magurele, Romania
⁴ INFN - Catania, Catania, Italy
⁵ Dip. di Fisica e Astronomia, Università di Catania, Catania, Italy
⁶ INFN - Gr. Col. di Messina and Università di Messina, Messina, Italy
⁷ GSI, Darmstadt, Germany
⁸ Dip. di Fisica, Università di Milano and INFN - Milano, Milano, Italy
⁹ Dip. di Fisica, Università di Napoli, Napoli, Italy
¹⁰ Dip. di Fisica e Astronomia, Università di Padova and INFN - Padova, Padova, Italy

^* e-mail: concetta.parascandolo@na.infn.it

Published online: 22 November 2017

Abstract

The excitation of the Dynamical Dipole mode along the fusion path was investigated for the first time in the formation of a heavy compound nucleus in the A~190 mass region. The compound nucleus was formed at identical conditions of excitation energy and spin from two entrance channels having different charge asymmetry: the charge asymmetric ⁴⁰Ca + ¹⁵²Sm and the nearly charge symmetric ⁴⁸Ca + ¹⁴⁴Sm at E_lab=11 and 10.1 MeV/nucleon, respectively. Both fusion–evaporation and fission events were studied simultaneously for the first time. The Dynamical Dipole mode excitation in the charge asymmetric channel was evidenced, in a model-independent way, by comparing the γ-ray multiplicity spectra and angular distributions of the two entrance channels with each other.

© The Authors, published by EDP Sciences, 2017

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