Measurement of 26Al(d,p)27Al to constrain the 26Al(p,gamma) reaction rate

ORAL

Abstract

The galactic mapping of the 1809-keV $\gamma$ ray from the beta decay of $^{26}$Al has provided an insight into ongoing galactic nucleosynthesis. Understanding the abundance of $^{26}$Al requires knowledge of rate of destruction of $^{26}$Al, partially via the $^{26}$Al(p,$\gamma$)$^{27}$Si reaction, which is determined by states near the proton threshold in $^{27}$Si. Due to the difficulty of measuring these resonances directly, an alternative is to measure mirror states in $^{27}$Al to inform the $^{27}$Si structure. The spectroscopic strengths of a few known mirror states are the dominant sources uncertainty in the $^{26}$Al(p,$\gamma$)$^{27}$Si reaction rate. The $^{26}$Al(d,p)$^{27}$Al reaction has been measured in inverse kinematics at the HRIBF. A beam of $\sim$5 million $^{26}$Al per second impinged on a $\sim$150 $\mu$g/cm$^2$ CD$_2$ target. Proton ejectiles were detected in the SIDAR and ORRUBA silicon detector arrays. Details of the experimental setup and data analysis will be presented.

*Work funded in part by the DoE and NSF

Authors

  • K.Y. Chae

    • University of Tennessee
  • Steven Pain

    • ORNL
  • D.W. Bardayan

    • ORNL
  • J.C. Blackmon

    • LSU
  • K.A. Chipps

    • Rutgers University
  • J.A. Cizewski

    • Rutgers University
  • K.L. Jones

    • University of Tennessee
  • R.W. Kavanagh

    • California Institute of Technology
  • R.L. Kozub

    • Tennessee Tech.
  • J.F. Liang

    • ORNL
  • C. Matei

    • ORAU
  • M. Matos

    • LSU
  • C.D. Nesaraja

    • ORNL
  • P.D. O'Malley

    • Rutgers University
  • W.A. Peters

    • Rutgers University
  • S.T. Pittman

    • University of Tennessee
  • K.T. Schmitt

    • University of Tennessee
  • J.F. Shriner

    • Tennessee Tech
  • M.S. Smith

    • ORNL
  • G.L. Wilson

    • University of Surrey