Eur. Phys. J. A (2020) 56: 87
https://doi.org/10.1140/epja/s10050-020-00075-2

Letter to the Editor

Status on fusion at deep subbarrier energies: impact of resonances on astrophysical factors

¹ Département de Recherches Subatomiques, Institut Pluridisciplinaire Hubert Curien, IN2P3-CNRS and Université de Strasbourg, 23, rue du Loess BP 28, 67037, Strasbourg Cedex 2, France
² Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
³ Institute of Modern Physics, CAS, Lanzhou, People’s Republic of China
⁴ Joint Department for Nuclear Physics, Institute of Modern Physics, Lanzhou University, CAS, Lanzhou, China

^* e-mail: akram@comp.tamu.edu

Received: 13 September 2019
Accepted: 30 January 2020
Published online: 18 March 2020

Abstract

Since the discovery of molecular resonances in in the early sixties a great deal of research work has been undertaken to study -clustering and resonant effects of the fusion process at sub-Coulomb barrier energies. The modified astrophysical factors of fusion have been extracted from direct fusion measurements at deep sub-barrier energies near the Gamow window. They were also obtained by the indirect Trojan horse method (THM). A comparison of direct measurements and the THM, which elucidates problems in the analysis of the THM, is discussed in this Letter to the Editor.