[Bubble] [EXTERNAL] 2021 APS DNP Abstract

[David Neto]

Hello All,


It was brought up in one of the earlier meetings if we wanted to submit an
abstract for the 2021 DNP fall meeting. Below is a draft version of an
abstract for everyone to look over and comment on. During tomorrow's bubble
meeting we can discuss if we want to submit an abstract and discuss any
feedback/comments.


Abstract:

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 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 100’s of picobarns.
We also discuss future changes to the experimental setup, potentially
pushing measurements down to the single picobarn range.


Let me know what you think or if you have any comments/notes/suggestions.


Cheers,

David
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