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Comparison of Coulomb breakup effects on the elastic scattering of \(^{6}\)He and \(^{8}\)He using a Coulomb dipole polarization potential

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Abstract

A recent new expression for the Coulomb dipole polarization potential (CDPP) is applied to different cluster structures of \(^{6}\)He and \(^{8}\)He. The CDPPs are used to compare the effect of breakup coupling on the elastic scattering of these projectiles from a \(^{208}\)Pb target at incident energies of 16 and 14 MeV, below the Coulomb barrier. None of the cluster structures investigated for \(^8\)He gives a significant CDPP, supporting previous inferences that breakup coupling is much less important for \(^8\)He than for \(^6\)He at energies close to the Coulomb barrier, despite the significantly larger absorption observed in the measured \(^8\)He elastic scattering at 16 MeV compared to that for \(^6\)He. Coupled reaction channels calculations of the 1n stripping reaction indicate a much enhanced role for this reaction in the elastic scattering of \(^8\)He compared to \(^6\)He, alone sufficient to account for the observed significant deviation from Rutherford scattering for \(^8\)He + \(^{208}\)Pb elastic scattering even at this sub-barrier energy.

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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: Additional data related to this work are available from the authors on request].

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Acknowledgements

This work was funded by the Polish National Agency for Academic Exchange (NAWA) within the Ulam Programme under grant agreement No. PPN/ULM/2019/1/00189/U/00001.

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Authors and Affiliations

  1. Heavy Ion Laboratory, University of Warsaw, ul. Pasteura 5a, 02-093, Warsaw, Poland

    H. M. Maridi & K. Rusek

  2. National Centre for Nuclear Research, ul. Andrzeja Sołtana 7, 05-400, Otwock, Poland

    N. Keeley

  3. Department of Physics, Faculty of Applied Science, Taiz University, Taiz, Yemen

    H. M. Maridi

Authors
  1. H. M. Maridi
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  2. K. Rusek
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  3. N. Keeley
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Correspondence to H. M. Maridi.

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Communicated by Alexandre Obertelli.

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Maridi, H.M., Rusek, K. & Keeley, N. Comparison of Coulomb breakup effects on the elastic scattering of \(^{6}\)He and \(^{8}\)He using a Coulomb dipole polarization potential. Eur. Phys. J. A 58, 49 (2022). https://doi.org/10.1140/epja/s10050-022-00702-0

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  • DOI: https://doi.org/10.1140/epja/s10050-022-00702-0

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