Measurement of the fusion excitation functions for $^{\mathrm{41,45}}$K $+$ $^{\mathrm{28}}$Si and $^{\mathrm{36,44}}$Ar $+ \quad^{\mathrm{28}}$Si at near-barrier energies

ORAL

Abstract

Fusion in neutron-rich environments is presently a topic of considerable interest. Experiments for an isotopic chain allow systematic exploration of the dependence of fusion on neutron number. Recent measurement of the near-barrier fusion excitation functions for $^{\mathrm{39,47}}$K $+$ $^{\mathrm{28}}$Si revealed a 7-fold enhancement in the cross-section for the radioactive isotope relative to the stable isotope. To expand the study of this system away from the closed N$=$20 and N$=$28 shells and to explore the role of proton pairing, Experiment 17002 was conducted at NSCL's ReA3 facility with low-intensity (approximately 10$^{\mathrm{4}}$ ions/s) beams. The experiment measured the fusion cross section for $^{\mathrm{41,45}}$K $+ \quad^{\mathrm{28}}$Si and $^{\mathrm{36,44}}$Ar $+ \quad^{\mathrm{28}}$Si for E/A $=$ 2-3 MeV by detecting and identifying fusion products using E-TOF with high efficiency. Details of the experimental setup as well as the measured experimental fusion excitation functions will be presented. Cross-sections will be compared to the previous $^{\mathrm{39,47}}$K $+$ $^{\mathrm{28}}$Si measurements as well as to coupled channels calculations.

*U.S. Department of Energy under Grant Nos. DE-FG02-88ER-40404

Authors

  • James Johnstone

    • Indiana University Bloomington
  • Rekam Giri

    • Indiana University Bloomington
  • Sylvie Hudan

    • Indiana University Bloomington
  • Romualdo deSouza

    • Indiana University Bloomington
  • Dieter Ackermann

    • GANIL
  • Abdou Chbihi

    • GANIL
  • Quentin Hourdille

    • GANIL
  • Austin Abbott

    • Texas A&M University
  • Catherine Balhoff

    • Texas A&M University
  • Andy Hannaman

    • Texas A&M University
  • Alan McIntosh

    • Texas A&M University
  • Maxwell Sorensen

    • Texas A&M University
  • Zachary Tobin

    • Texas A&M University
  • Aditya Wakhle

    • Texas A&M University
  • Sherry Yennello

    • Texas A&M University