19F(p,g)20Ne and the Stellar CNO Burning Cycle

Doctoral Dissertation

Abstract

A new measurement of the 19F(p,g) breakout reaction to CNO cycle has been completed at the University of Notre Dame, covering energies from 200-800 keV. The sensitivity of the measurement is a significant improvement over past measurements, including measurements of sufficient accuracy to observe previously unmeasured interference terms. As part of the development for the measurements, an particle accelerator of nuclear astrophysics was refurbished and installed in the Nuclear Structure Laboratory at the University of Notre Dame. A gamma-ray detector system was designed for isolating high Q-value reactions in a strong gamma-ray background.

The new measurements decreased the resonance strengths for the 19F(p,g) reaction which decrease the stellar reaction rate by a factor of four. As 19F(p,g) represents the only possible breakout path from the cold CNO cycle, this confirmed that the CNO cycle is closed in typical stellar burning scenarios.

Attributes

Attribute NameValues
URN
  • etd-12152005-144632

Author Aaron Joseph Couture
Advisor J. Daniel Gezelter
Contributor Ani Aprahamian, Committee Member
Contributor Philippe Collon, Committee Member
Contributor Michael Wiescher, Committee Member
Contributor John Losecco, Committee Member
Contributor J. Daniel Gezelter, Committee Chair
Degree Level Doctoral Dissertation
Degree Discipline Physics
Degree Name PhD
Defense Date
  • 2005-12-07

Submission Date 2005-12-15
Country
  • United States of America

Subject
  • CNO Cycle

  • Fluorine-19

  • Stellar Hydrogen Burning

Publisher
  • University of Notre Dame

Language
  • English

Record Visibility Public
Content License
  • All rights reserved

Departments and Units

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