Abstract
Trojan Horse method plays an important part for the measurement of several charged particle in- duced reactions cross sections of astrophysical interest. In order to better understand its cornerstones and the related applications to different astrophysical scenarios several tests were performed to verify all its proper- ties and the possible future perspectives. The Trojan Horse nucleus invariance for the binary reactions d(d,p)t, 6,7 Li(p,α) 3,4 He was therefore tested using the appropriate quasi free break- ups, respectively. In the first cases results from 6 Li and 3 He break up were used, while for the lithium fusion reactions break-ups of 2 H and 3 He were compared. The astrophysical S(E)-factors for the different processes were then extracted in the framework of the Plane Wave Approximation applied to the different break-up schemes. The obtained results are compared with direct data as well as with previous indirect investigations. The very good agreement between data coming from different break-up schemes confirms the applicability of the plane wave approximation and suggests the independence of binary indirect cross section on the chosen Trojan Horse nucleus also for the present cases. Moreover the astrophysical implications of the results will also be discussed in details.
Highlights
Fusion reactions induced by charged particles at astrophysical energies have many experimental difficulties, mainly connected to the presence of the Coulomb barrier and the electron screening effect
An important role is played by the Trojan Horse Method (THM), usually applied at the energies of astrophysical interest, which is discussed extensively elsewhere [3,4,5,6,7,8,9,10,11,12, 12,13,14,15,16,17,18]
We refer to previous papers and references therein for an extensive discussion on THM and its theoretical formalism [20]
Summary
Fusion reactions induced by charged particles at astrophysical energies have many experimental difficulties, mainly connected to the presence of the Coulomb barrier and the electron screening effect. An important role is played by the Trojan Horse Method (THM), usually applied at the energies of astrophysical interest, which is discussed extensively elsewhere [3,4,5,6,7,8,9,10,11,12, 12,13,14,15,16,17,18]. THM allows one to extract the low energy behavior of a binary reaction by applying the well known theoretical formalism of the Quasi-Free (QF) process, in the simplest cases. The basic idea of the THM is to extract the cross section in the low-energy region of a two-body reaction with significant astrophysical impact: A+ x → c+C (1). We refer to previous papers and references therein for an extensive discussion on THM and its theoretical formalism [20]
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