Measuring the cross section of the 15N(a,g)19F reaction using a single-fluid bubble chamber.

15N(α,γ)19F is believed to be the primary means of nucleosynthesis of Fluorine in AGB and WR stars. In this talk, we present the use of a single-fluid bubble chamber to measure the time-inverse photo-dissociation reaction. Benefiting from increases of the luminosity, over methods using thin-films or gas targets, by several orders of magnitude from both the factor of 10-100 gain from the reciprocity theorem and the use of a thicker liquid target. We will discuss the results of test measurements at JLAB, measuring the cross section of the photodisintegration process 19F(γ,α)15N by bombarding a superheated fluid of C3F8 with bremsstrahlung γ rays. Simulating the γ ray beam in Geant4 and convoluting the γ spectrum with the Breit-Wigner cross-section. Using this technique, we measure cross sections of the time-reversed 15N(α,γ)19F reaction down to the range of hundreds of picobarns. We also discuss future changes to the experimental setup, potentially pushing measurements down to the tens of picobarn range.