Programme

P.7 -- Poster, VCTP-49

Date: Wednesday, 31 July 2024

Time: 08:30 - 10:00

Reaction rate of proton-deuteron radiative capture and its astrophysical implication

Do Huy Tho (1), Nguyen Le Anh (1), Dao Nhut Anh (1), Nguyen Huu Nha (2)

(1) Ho Chi Minh City University of Education (HCMUE), Ho Chi Minh City, Viet Nam; (2) Department of Theoretical Physics, VNUHCM-University of Science, Ho Chi Minh City

We investigate the reaction rate of proton-deuteron ($pd$) radiative capture based on our calculated astrophysical $S$ factor [1,2]. Using the potential model framework, we compute the astrophysical $S$ factors and reaction rates for both $E1$ and $M1$ transitions. The extrapolated value for $S(0)$, including both transitions, is determined to be $0.211 \pm 0.016$ eV b [1]. At low temperatures, relevant to deuterium abundance sensitivity, the reaction rate for the $M1$ transition plays a significant role, contributing approximately 11\% to 16\% in our approach. Our results show excellent agreement, with less than a 5\% difference compared to both experimental and theoretical data. [1] N. Le Anh, D. Nhut Anh, D. Huy Tho, and N. Huu Nha (2024). Magnetic dipole transition in proton-deuteron radiative capture at BBN energies within potential model. Physica Scripta, 99, 065026. [2] D. Nhut Anh, D. Huy Tho, Nguyen T. Hue, and H. Thai An (2024). Analysis of $E1$ transition in pd radiative capture within potential model. Ho Chi Minh City University of Education Journal of Science, 21(3), 424-432.

Presenter: Do Huy Tho