Background: Double charge exchange (DCE) nuclear reactions have recently attracted much interest as tools to provide experimentally driven information about nuclear matrix elements of interest in the context of neutrinoless double-β decay. In this framework, a good description of the reaction mechanism and a complete knowledge of the initial and final-state interactions are mandatory. Presently, not enough is known about the details of the optical potentials and nuclear response to isospin operators for many of the projectile-target systems proposed for future DCE studies. Among these, the 20Ne+76Ge DCE reaction is particularly relevant due to its connection with 76Ge double-β decay. Purpose: We intend to characterize the initial-state interaction for the 20Ne+76Ge reactions at 306 MeV bombarding energy and determine the optical potential and the role of the couplings between elastic channel and inelastic transitions to the first low-lying excited states. Methods: We determine the experimental elastic and inelastic scattering cross-section angular distributions, compare the theoretical predictions by adopting different models of optical potentials with the experimental data, and evaluate the coupling effect through the comparison of the distorted-wave Born approximation calculations with the coupled channels ones. Results: Optical models fail to describe the elastic angular distribution above the grazing angle (≈9.4∘). A correction in the geometry to effectively account for deformation of the involved nuclear systems improves the agreement up to about 14∘. Coupled channels effects are crucial to obtain good agreement at large angles in the elastic scattering cross section. Conclusions: The analysis of elastic and inelastic scattering data turned out to be a powerful tool to explore the initial and final-state interactions in heavy-ion nuclear reactions at high transferred momenta.
Ne 20 + Ge 76 elastic and inelastic scattering at 306 MeV / Spatafora, A.; Cappuzzello, F.; Carbone, D.; Cavallaro, M.; Lay, J. A.; Acosta, L.; Agodi, C.; Bonanno, D.; Bongiovanni, D.; Boztosun, I.; Brischetto, G. A.; Burrello, S.; Calabrese, S.; Calvo, D.; Chavez Lomeli, E. R.; Ciraldo, I.; Colonna, M.; Delaunay, F.; Deshmukh, N.; Ferreira, J. L.; Finocchiaro, P.; Fisichella, M.; Foti, A.; Gallo, G.; Hacisalihoglu, A.; Iazzi, F.; Lanzalone, G.; Lenske, H.; Linares, R.; Lo Presti, D.; Lubian, J.; Moralles, M.; Muoio, A.; Oliveira, J. R. B.; Pakou, A.; Pandola, L.; Petrascu, H.; Pinna, F.; Reito, S.; Russo, G.; Santagati, G.; Sgouros, O.; Solakci, S. O.; Soukeras, V.; Souliotis, G.; Torresi, D.; Tudisco, S.; Yildirim, A.; Zagatto, V. A. B.. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 100:3(2019).
|Titolo:||Ne 20 + Ge 76 elastic and inelastic scattering at 306 MeV|
|Data di pubblicazione:||2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevC.100.034620|
|Appare nelle tipologie:||1.1 Articolo in rivista|