“Trojan horse” method applied to2H(6Li,

C. Spitaleri

¹

,

S. Typel

²

,

R. G. Pizzone

³

et al.

Abstract

The 6 Li͑ 6 Li,␣␣) 4 He three-body reaction has been studied in a kinematically complete experiment at E 6 Li ϭ6 MeV, from which indirect information on the 2 H͑ 6 Li,␣) 4 He two-body reaction at 13рE c.m. р750 keV has been extracted by applying the Trojan horse method. The method used a recent improved formulation. The derived astrophysical S(E) factor for the two-body process is compared with that obtained from direct experiments.

Influence of theα−dmotion inLi6on Trojan horse applications

“…(Color online) Width (FWHM) for the α momentum distribution inside 6 Li as a function of the transferred momentum q t (see text). Diamonds represent previous results by [2,18], full dots and stars are new data from the 6 Li( 6 Li, αα) 4 He (blue projectile breakup, red target breakup) and 3 He( 6 Li, pα) 4 He experiments [3,7,22,24]. The solid line represents an empirical fit described in the text.…”

“…The main features of this method are extensively discussed elsewhere [3][4][5][6][7][8][9][10]. Basically the method allows us to measure the bare-nucleus two-body cross sections [or equivalently the bare-nucleus astrophysical S(E) factors] by means of quasifree three-body reactions.…”

“…We have improved these results for the 6 Li nucleus with new data taken from recent experiments [3,22]. | ( p s )| 2 was calculated by using a Hankel function for the s state given FIG.…”

“…The width of the momentum distribution was extracted for the 6 Li( 6 Li, αα) 4 He reaction at different energies. The experimental details of these experiments are reported elsewhere [3].…”

Theory of the Trojan–Horse method

“…The potential V xb appearing in the T-matrix element (21) describes the interaction between x and b in the Trojan Horse a. Assuming a simple cluster picture of a and neglecting contributions from excited states of x and b or other partitions in the ground state, the momentum amplitude W ( q) of the product…”