17–22 Sept 2023
Asia/Seoul timezone

Astrophysical S factor of 15N(p,γ)16O in the cluster effective field theory

19 Sept 2023, 17:20
5m
Poster Nuclear reaction rates and stellar abundances Poster session (Nuclear reaction rates and stellar abundances)

Speaker

Sangyeong SON (Kyungpook National University)

Description

The radiative proton capture reaction of 15N(p,γ)16O is one of the thermonuclear reactions in the carbon-nitrogen-oxygen (CNO) cycle. This process provides a link between the type-I (CN) cycle and type-II (NO) cycle so that the 16O nucleus can be produced and the further types of the cycle start. We investigated the 15N(p,γ)16O reaction in the effective field theoretical approach. The effective Lagrangian which is appropriate for this reaction in a stellar environment is introduced, and the capture amplitude and the corresponding S factor are calculated. In this work, we included two resonances due to the excited states of 16O as di-field propagators. By fitting our theoretical result to the empirical data of the S factor we determined the model parameters such as the low-energy constants and the S factor values of S(0)=29.834.1 keV b from the recent data sets are estimated. These results are compared to the estimations from several approaches such as the R-matrix and the potential models.

Primary author

Sangyeong SON (Kyungpook National University)

Co-authors

Shung-Ichi ANDO (Sunmoon University) Prof. Yongseok OH (Kyungpook National University)

Presentation materials

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