Excitation of isobaric analog states from (p,n) and (He3,t) charge-exchange reactions within the G-matrix folding method

Phan Nhut Huan, Nguyen Le Anh, Bui Minh Loc, and Isaac Vidaña
Phys. Rev. C 103, 024601 – Published 1 February 2021

Abstract

Differential cross sections of (p,n) and (He3,t) charge-exchange reactions leading to the excitation of the isobaric analog state (IAS) of the target nucleus are calculated with the distorted wave Born approximation. The G-matrix double-folding method is employed to determine the nucleus-nucleus optical potential within the framework of the Lane model. G matrices are obtained from a Brueckner-Hartree-Fock calculation using the Argonne Av18 nucleon-nucleon potential. Target densities have been taken from Skyrme-Hartree-Fock calculations which predict values for the neutron skin thickness of heavy nuclei compatible with current existing data. Calculations are compared with experimental data of the reactions (p,n)IAS on C14 at Elab=135 MeV and Ca48 at Elab=134 MeV and Elab=160 MeV, and (He3,t)IAS on Ni58, Zr90, and Pb208 at Elab=420 MeV. Experimental results are well described without the necessity of any rescaling of the strength of the optical potential. A clear improvement in the description of the differential cross sections for the (He3,t)IAS reactions on Ni58 and Zr90 targets is found when the neutron excess density is used to determine the transition densities. Our results show that the density and isospin dependences of the G matrices play a non-negligible role in the description of the experimental data.

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  • Received 31 October 2020
  • Revised 18 December 2020
  • Accepted 7 January 2021

DOI:https://doi.org/10.1103/PhysRevC.103.024601

©2021 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Phan Nhut Huan1,2,*, Nguyen Le Anh3,4,5,†, Bui Minh Loc6,7,‡, and Isaac Vidaña8,§

  • 1Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
  • 2Faculty of Natural Sciences, Duy Tan University, Da Nang City, Vietnam
  • 3Department of Theoretical Physics, Faculty of Physics and Engineering Physics, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
  • 4Vietnam National University, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
  • 5Department of Physics, Ho Chi Minh City University of Education, 280 An Duong Vuong, District 5, Ho Chi Minh City, Vietnam
  • 6Division of Nuclear Physics, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
  • 7Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
  • 8INFN Sezione di Catania, Dipartimento di Fisica “Ettore Majorana”, Università di Catania, Via Santa Sofia 64, I-95123 Catania, Italy

  • *phannhuthuan@duytan.edu.vn
  • anhnl@hcmue.edu.vn
  • Corresponding author: buiminhloc@tdtu.edu.vn
  • §isaac.vidana@ct.infn.it

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Vol. 103, Iss. 2 — February 2021

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