Study of the threshold anomaly effect in the reaction Li+Pb at energies around the Coulomb barrier

E. Vardaci; P. K. Rath; M. Mazzocco; A. Di Nitto; G. La Rana; C. Parascandolo; D. Pierroutsakou; M. Romoli; A. Boiano; A. Vanzanella; M. Cinausero; G. Prete; N. Gelli; F. Lucarelli; C. Mazzocchi; M. La Commara; L. Fortunato; A. Guglielmetti; F. Soramel; L. Stroe; C. Signorini

doi:10.1140/epja/s10050-021-00400-3

2022 Impact factor 2.7

Hadrons and Nuclei

Cluster Structure and Dynamics of Nuclei - A Tribute to Mahir Hussein

Open Access

Eur. Phys. J. A (2021) 57: 95
https://doi.org/10.1140/epja/s10050-021-00400-3

Regular Article - Experimental Physics

Study of the threshold anomaly effect in the reaction Li+Pb at energies around the Coulomb barrier

E. Vardaci¹^,2^a, P. K. Rath¹^,2^,3, M. Mazzocco⁴^,5, A. Di Nitto¹^,2, G. La Rana¹^,2, C. Parascandolo¹^,2, D. Pierroutsakou², M. Romoli², A. Boiano², A. Vanzanella², M. Cinausero⁶, G. Prete⁶, N. Gelli⁷, F. Lucarelli⁷^,8, C. Mazzocchi⁹, M. La Commara²^,10, L. Fortunato⁴^,5, A. Guglielmetti¹¹^,12, F. Soramel⁴^,5, L. Stroe¹³ and C. Signorini⁴

¹ Dipartimento di Fisica “E. Pancini”, Università degli Studi di Napoli “Federico II”, 80126, Naples, Italy
² Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, 80126, Naples, Italy
³ Centurion University of Technology and Management, 761211, Gajapati, Odisha, India
⁴ Dipartimento di Fisica e Astronomia “G. Galilei”, Università degli Studi di Padova, 35131, Padua, Italy
⁵ Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131, Padua, Italy
⁶ Laboratori Nazionali di Legnaro dell’Istituto Nazionale di Fisica Nucleare, 35020, Padua, Legnaro, Italy
⁷ Istituto Nazionale di Fisica Nucleare, 50019, Florence, Italy
⁸ Dipartimento di Fisica, Università degli Studi di Firenze, 50019, Florence, Italy
⁹ Faculty of Physics, University of Warsaw, PL-02-093, Warsaw, Poland
¹⁰ Dipartimento di Farmacia, Università degli Studi di Napoli “Federico II”, 80126, Naples, Italy
¹¹ Universitá degli Studi di Milano, dipartimento di fisica, Via celoria 16, 20133, Milano, Italy
¹² Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133, Milan, Italy
¹³ Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania

^a vardaci@na.infn.it

Received: 15 January 2021
Accepted: 12 February 2021
Published online: 16 March 2021

Abstract

The elastic scattering in the reaction Li+Pb was investigated in the bombarding energy range from 25 to 39 MeV. The real and imaginary parts of the optical potential were analyzed by using a phenomenological potential. A dispersion relation analysis is presented in order to investigate the threshold anomaly effect. It is concluded that Li has an intermediate behavior between the tightly bound nuclei such as O and the loosely bound nuclei such as Li where the lack of the threshold anomaly is unambiguously observed. Reaction cross sections are also extracted from the elastic scattering data and its comparison with the ones of other systems has been performed to draw hints on the effect of the breakup channel.

© The Author(s) 2021

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