https://doi.org/10.1140/epja/s10050-022-00702-0
Regular Article - Experimental Physics
Comparison of Coulomb breakup effects on the elastic scattering of 
He and 
He using a Coulomb dipole polarization potential
1
Heavy Ion Laboratory, University of Warsaw, ul. Pasteura 5a, 02-093, Warsaw, Poland
2
National Centre for Nuclear Research, ul. Andrzeja Sołtana 7, 05-400, Otwock, Poland
3
Department of Physics, Faculty of Applied Science, Taiz University, Taiz, Yemen
Received:
11
October
2021
Accepted:
7
March
2022
Published online:
18
March
2022
A recent new expression for the Coulomb dipole polarization potential (CDPP) is applied to different cluster structures of He and He. The CDPPs are used to compare the effect of breakup coupling on the elastic scattering of these projectiles from a 
Pb target at incident energies of 16 and 14 MeV, below the Coulomb barrier. None of the cluster structures investigated for 
He gives a significant CDPP, supporting previous inferences that breakup coupling is much less important for He than for 
He at energies close to the Coulomb barrier, despite the significantly larger absorption observed in the measured He elastic scattering at 16 MeV compared to that for He. Coupled reaction channels calculations of the 1n stripping reaction indicate a much enhanced role for this reaction in the elastic scattering of He compared to He, alone sufficient to account for the observed significant deviation from Rutherford scattering for He + Pb elastic scattering even at this sub-barrier energy.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
