The 19F(a,p)22Ne Reaction and the Nucleosynthesis of Fluorine

Doctoral Dissertation


The 19F(a,p)22Ne reaction is considered to be the main source of fluorine depletion during the Asymptotic Giant Branch and Wolf-Rayet phases in stars. The reaction rate still retains large uncertainties due to the lack of experimental studies available. The yields for both the ground p0 and first excited state p1 exit channels of 22Ne have been measured with the University of Notre Dame KN van de Graaff accelerator. Several resonances were found in the energy range Elab=792-1990 keV and their energies and reduced width amplitudes have been determined in the context of the R-matrix theory of nuclear reactions. A new reaction rate is provided and the impact the new rate has for the nucleosynthesis of fluorine in stellar environments is discussed.


Attribute NameValues
  • etd-07222005-162211

Author Claudio Ugalde
Advisor Michael Wiescher
Contributor Mitchell Wayne, Committee Member
Contributor Umesh Garg, Committee Member
Contributor Philippe Collon, Committee Member
Contributor Michael Wiescher, Committee Chair
Degree Level Doctoral Dissertation
Degree Discipline Physics
Degree Name PhD
Defense Date
  • 2005-07-05

Submission Date 2005-07-22
  • United States of America

  • experimental

  • AGB stars

  • R-matrix

  • nuclear astrophysics

  • fluorine

  • University of Notre Dame

  • English

Record Visibility Public
Content License
  • All rights reserved

Departments and Units


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