Be9+Sn120 scattering at near-barrier energies within a four-body model

A. Arazi, J. Casal, M. Rodríguez-Gallardo, J. M. Arias, R. Lichtenthäler Filho, D. Abriola, O. A. Capurro, M. A. Cardona, P. F. F. Carnelli, E. de Barbará, J. Fernández Niello, J. M. Figueira, L. Fimiani, D. Hojman, G. V. Martí, D. Martínez Heimman, and A. J. Pacheco
Phys. Rev. C 97, 044609 – Published 18 April 2018

Abstract

Cross sections for elastic and inelastic scattering of the weakly bound Be9 nucleus on a Sn120 target have been measured at seven bombarding energies around and above the Coulomb barrier. The elastic angular distributions are analyzed with a four-body continuum-discretized coupled-channels (CDCC) calculation, which considers Be9 as a three-body projectile (α+α+n). An optical model analysis using the São Paulo potential is also shown for comparison. The CDCC analysis shows that the coupling to the continuum part of the spectrum is important for the agreement with experimental data even at energies around the Coulomb barrier, suggesting that breakup is an important process at low energies. At the highest incident energies, two inelastic peaks are observed at 1.19(5) and 2.41(5) MeV. Coupled-channels (CC) calculations using a rotational model confirm that the first inelastic peak corresponds to the excitation of the 21+ state in Sn120, while the second one likely corresponds to the excitation of the 31 state.

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  • Received 29 July 2017
  • Revised 29 December 2017

DOI:https://doi.org/10.1103/PhysRevC.97.044609

©2018 American Physical Society

Physics Subject Headings (PhySH)

Accelerators & BeamsNuclear Physics

Authors & Affiliations

A. Arazi1,2,*, J. Casal3,4,†, M. Rodríguez-Gallardo3, J. M. Arias3, R. Lichtenthäler Filho5, D. Abriola1, O. A. Capurro1, M. A. Cardona1,2, P. F. F. Carnelli1,2, E. de Barbará1, J. Fernández Niello1,2, J. M. Figueira1,2, L. Fimiani1, D. Hojman1,2, G. V. Martí1, D. Martínez Heimman1,2, and A. J. Pacheco1,2

  • 1Laboratorio TANDAR, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, BKNA1650 San Martín, Argentina
  • 2Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Rivadavia 1917, C1033AAJ Buenos Aires, Argentina
  • 3Departamento de Física Atómica, Molecular y Nuclear, Facultad de Física, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla, Spain
  • 4European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) and Fondazione Bruno Kessler, Villa Tambosi, Strada delle Tabarelle 286, I-38123 Villazzano (TN), Italy
  • 5Departamento de Física Nuclear, Instituto de Física da Universidade de São Paulo, 05508-090 São Paulo, SP, Brazil

  • *arazi@tandar.cnea.gov.ar
  • jcasal@us.es

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Issue

Vol. 97, Iss. 4 — April 2018

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