Measurement of the 20 and 90 keV resonances in the ${}^{18}{\rm O}(p,\alpha){}^{15}$N reaction via THM

TL;DR

This study used the Trojan Horse Method to measure the 20 and 90 keV resonances in the $^{18}{ m O}(p, extalpha)^{15}{ m N}$ reaction, reducing uncertainties in astrophysical models of nucleosynthesis.

Contribution

First indirect measurement of low-energy resonances in the $^{18}{ m O}(p, extalpha)^{15}{ m N}$ reaction using THM, providing more accurate reaction rates for astrophysical applications.

Findings

Determined the strength of 20 keV resonance.

Determined the strength of 90 keV resonance.

Updated reaction rate for astrophysical models.

Abstract

The $^{18}{\rm O}(p,\alpha)^{15}{\rm N}$ reaction is of primary importance in several astrophysical scenarios, including fluorine nucleosynthesis inside AGB stars as well as oxygen and nitrogen isotopic ratios in meteorite grains. Thus the indirect measurement of the low energy region of the $^{18}{\rm O}(p,\alpha)^{15}{\rm N}$ reaction has been performed to reduce the nuclear uncertainty on theoretical predictions. In particular the strength of the 20 and 90 keV resonances have been deduced and the change in the reaction rate evaluated.