Astrophysical measurements with radioactive $^{17}$F beams at HRIBF

ORAL

Abstract

The astrophysical rates of the $^{14}$O($\alpha,p$)$^{17}$F and $^{17}$F($p,\gamma$)$^{18}$Ne reactions affect the transition to the $\alpha p$-process in x-ray bursts and $^{18}$F production in novae, respectively. Both reactions have been studied in the laboratory with the intense radioactive $^{17}$F beams delivered at HRIBF. Recently beam intensities greater than 10$^7$ $^{17}$F ions/s have become available, making possible the first direct measurement of the $^{17}$F ($p,\gamma$)$^{18}$Ne cross section [K. A. Chipps et al., Phys. Rev. Lett. 102, 152502 (2009)]. These high beam intensities also provide an opportunity to make the first precise determination of the resonance strength of the 1$^-$ $^{14}$O ($\alpha,p$)$^{17}$F resonance near E$_{c.m.}$=1 MeV. Recent results and upcoming plans for measurements with $^{17}$F beams at the HRIBF will be presented.

*ORNL is managed by UT-Battelle, LLC, for the U.S. DOE under contract DE-AC05-00OR22725.

Authors

  • D.W. Bardayan

    • Oak Ridge National Lab
    • ORNL
    • Oak Ridge National Laboratory
  • C.D. Nesaraja

  • S.D. Pain

  • M.S. Smith

    • ORNL
  • K.A. Chipps

  • U. Greife

    • Col. School Mines
  • J.C. Blackmon

    • LSU
  • K.Y. Chae

  • B.H. Moazen

  • S.T. Pittman

    • U. Tenn.
  • R. Hatarik

  • W.A. Peters

    • Rutgers
  • R.L. Kozub

  • J.F. Shriner, Jr.

    • Tenn. Tech.
  • C. Matei

    • ORAU