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