Nuclear Astrophysics with the Trojan Horse Method

NUBA Conference Series -1: Nuclear Physics and Astrophysics

物理学;天文学

Spitaleri, Claudio^1,2

Dipartimento di Fisica e Astronomia, Università di Catania, Catania, Italy^1

INFN, Laboratori Nazionali Del Sud, Catania, Italy^2

关键词: Cross-section measurement;    Cross-section values;    Experimental determination;    Experimental techniques;    Nuclear astro-physics;    Physical conditions;    Terrestrial laboratories;    Trojan horse methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/590/1/012013/pdf
DOI  :  10.1088/1742-6596/590/1/012013

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

In stars nuclear reactions take place at physical conditions that make very hard their measurements in terrestrial laboratories. Indeed in astrophysical environments nuclear reactions between charged nuclei occur at energies much lower than the Coulomb barrier and the corresponding cross section values lie in the nano or picobarn regime, that makes their experimental determination extremely difficult. This is due to the very small barrier Coulomb penetration factor, which produces an exponential fall off of the cross section as a function of energy. Additionally, the presence of the electron screening needs to be properly taken into account when dealing with cross section measurements at low-energies. The Trojan Horse Method (THM) represents an independent experimental technique, allowing one to measure astrophysical S(E)-factor bared from both Coulomb penetration and electron screening effects. The main advantages and the most recent results are here shown and discussed.