Speaker
Description
ELISSA is a 4π silicon strip detector array implemented at the ELI-NP facility for measurements of photodissociation reactions using high-brilliance, quasi-monoenergetic gamma beams [1, 2]. Direct measurements of the 7Li(p, α)4He [3] and 6Li(p, α)3He reactions related to the "Cosmological Li problem" as well as 11B(p, α)αα and 19F(p, α)16O reactions at astrophysical energies were performed at the Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH) using a scaled-down version of the ELISSA detector array and the 3 MV Tandem accelerator. The thermonuclear reaction rates of 7Li(p, α)4He and their uncertainties were computed. It has been shown that the present DWBA prediction results in 5%–25% difference in reaction rate below T9 = 0.2.
In this talk, recent measurements of reaction cross-sections at astrophysical energies using the ELISSA array will be presented.
References:
[1] S. Chesnevskaya et al., Journal of Instrumentation 90 T05006 (2018).
[2] T. Petruse et al., Nucl. Instrum. Methods Phys. Res. Sect. A 1086, 171317 (2026).
[3] H. Pai et al., Phys. Rev. C 113, 045804 (2026).
Acknowledgment: This work was supported by the Romanian Ministry of Research and Innovation under research contract PN 23 21 01 06 and by the Romanian Ministry of Research, Innovation, and Digitalization, Project no. PN-IV-P2-2.1-TE-2023-0144, within PNCDI IV.