Status of the direct measurements of 18O(p,γ)19F and 23Na(p,γ)24Mg cross sections at astrophysical energies at LUNA

8th European Summer School on Experimental Nuclear Astrophysics (Santa Tecla School)

物理学;天文学

Boeltzig, A.^1 ; Pantaleo, F.R.^2,3 ; Best, A.^4 ; Imbriani, G.^5,6 ; Junker, M.^1,4

Gran Sasso Science Institute, L'Aquila, Italy^1

Università degli Studi di Bari Aldo Moro, Bari, Italy^2

INFN Sezione di Bari, Bari, Italy^3

Laboratori Nazionali Del Gran Sasso, Assergi, Italy^4

Università degli Studi di Napoli Federico II, Napoli, Italy^5

INFN Sezione di Napoli, Napoli, Italy^6

关键词: Astrophysical energies;    Cross-section measurement;    Direct measurement;    Direct observations;    Measurements of;    Nuclear astro-physics;    Precise determinations;    Upper limits;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/703/1/012014/pdf
DOI  :  10.1088/1742-6596/703/1/012014

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

18O(p, γ)19F and23Na(p,γ)24Mg are reactions of astrophysical interest for example in AGB star scenarios. The rates of both reactions are potentially influenced by low-energy resonances for whose strengths either exist only values with large uncertainties, upper limits or even contradictory claims. Measurements at the Laboratory for Underground Nuclear Astrophysics (LUNA) aim at a direct observation of these low-energy resonances, and additional cross section measurements to aid a more precise determination of the reaction rates in astrophysical scenarios. We report the experimental setup and the status of the ongoing measurements of the two reactions at LUNA.