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Determination of \(\alpha \)-optical potential for reactions with p-nuclei from the study of (\(\alpha \),n) reactions in the astrophysically relevant energy region

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Abstract

Optical potential parameters in nuclear model calculations are determined by fitting elastic scattering angular distribution data. Due to the dominance of Coulomb part, elastic scattering is performed at much higher energies. As a result, a change in potential is required for low-energy astrophysical reactions. A different approach is suggested using (\(\alpha \),n) reaction to determine the modified alpha optical potentials suitable for astrophysically relevant low energy regions. Reactions on p-nuclei in the mass region A \(\approx \) 92–168 have been chosen and a modified McFadden–Satchler \(\alpha \)-optical potential is obtained from fitting the (\(\alpha \),n) reaction data. The effect of level density and \(\gamma \)-ray strength function is also studied using this new potential by analyzing (\(\alpha ,\gamma \)) cross-sections.

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Data Availability Statement

This manuscript has associated data in a data repository. [Authors’ comment: All experimental data are taken from National Nuclear Data Center(NNDC) (https://www.nndc.bnl.gov).]

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Acknowledgements

The authors would like to thank Prof. Subinit Roy, Dr. Nikit Nitin Deshmukh and Tanmoy Bar for the fruitful discussions during this work. Authors also acknowledge Ritesh Ghosh and Suman Das for their help in numerical calculations.

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Authors and Affiliations

  1. Nuclear Physics Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata, 700064, India

    Dipali Basak & Chinmay Basu

  2. Homi Bhabha National Institute, Anushaktinagar, Mumbai, Maharashtra, Maharashtra 400094, India

    Dipali Basak

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  1. Dipali Basak
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  2. Chinmay Basu
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Correspondence to Chinmay Basu.

Additional information

Communicated by Arnau Rios Huguet

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Basak, D., Basu, C. Determination of \(\alpha \)-optical potential for reactions with p-nuclei from the study of (\(\alpha \),n) reactions in the astrophysically relevant energy region. Eur. Phys. J. A 58, 150 (2022). https://doi.org/10.1140/epja/s10050-022-00798-4

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