Near- and sub-barrier fusion of the Be7+Ni58 system

E. Martinez-Quiroz, E. F. Aguilera, D. Lizcano, P. Amador-Valenzuela, H. García-Martínez, J. J. Kolata, A. Roberts, L. O. Lamm, G. Rogachev, V. Guimarães, F. D. Becchetti, A. Villano, M. Ojaruega, M. Febbraro, Y. Chen, H. Jiang, P. A. DeYoung, and G. F. Peaslee
Phys. Rev. C 90, 014616 – Published 29 July 2014

Abstract

Evaporation proton yields were measured for the fusion of the radioactive proton-rich nucleus Be7 onto a Ni58 target at six near-barrier energies. Total fusion cross sections were deduced by using calculated proton multiplicities. The resulting fusion excitation function shows a considerable enhancement with respect to calculations for a bare potential, even for energies above the Coulomb barrier. Inelastic couplings can account for the enhancement at the highest energy. Total fusion channels nearly saturate the total reaction cross section in the measured energy region. Comparison with previous results scaled appropriately for 7Be+(27Al,238U) shows good agreement.

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  • Received 24 March 2014
  • Revised 7 July 2014

DOI:https://doi.org/10.1103/PhysRevC.90.014616

©2014 American Physical Society

Authors & Affiliations

E. Martinez-Quiroz, E. F. Aguilera*, D. Lizcano, P. Amador-Valenzuela, and H. García-Martínez

  • Departamento de Aceleradores, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18-1027, Código Postal 11801, México, Distrito Federal, México

J. J. Kolata, A. Roberts, L. O. Lamm§, and G. Rogachev

  • Physics Department, University of Notre Dame, Notre Dame, Indiana, 46556-5670, USA

V. Guimarães

  • Instituto de Fisica, Universidade de Sao Paulo, P. O. Box 66318, 05389-970, Sao Paulo, SP, Brazil

F. D. Becchetti, A. Villano, M. Ojaruega, M. Febbraro, Y. Chen**, and H. Jiang

  • Physics Department, University of Michigan, Ann Arbor, Michigan, 48109-1040, USA

P. A. DeYoung

  • Department of Physics, Hope College, Holland, Michigan, 49423-9000, USA

G. F. Peaslee

  • Department of Chemistry, Hope College, Holland, Michigan, 49423-9000, USA

  • *eli.aguilera@inin.gob.mx
  • Present address: Instituto de Física, Universidade Federal Fluminense, Av. Litoranea s/n, Gragoatá, Niterói, R. J., 24210-340, Brazil.
  • Present address: Los Alamos National Lab, Los Alamos, New Mexico, 87545, USA.
  • §Deceased.
  • Present address: Department of Physics, and Astronomy and Cyclotron Institute, Texas A&M University, College Station, Texas, 77843, USA.
  • Present address: Physics Department, University of Minnesota, Minneapolis, Minnesota, 55455, USA.
  • **Present address: 21st Century Oncology, 555 D'onofrio Dr, Madison, Wisconsin, 53719, USA.

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Vol. 90, Iss. 1 — July 2014

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