Nuclear rainbow in elastic scattering of 9Be nuclei

Evidence for a dynamically refracted primary bow in weakly boundBe9rainbow scattering fromO16

“…=47. 5 MeV, E( 9 Be)=74.25 MeV) [21] in the rainbow energy region. Hereafter, the incident energies are given in the frame of E( 9 Be).…”

“…A complex coupling, which is often used but has no rigorous theoretical justification especially for a composite projectile [33], is not introduced because without it the present EDF model successfully reproduced many rainbow scattering data systematically over a wide range of incident energies [6,7,22,23,[34][35][36][37][38][39]. [21] in the rainbow energy region. Hereafter, the incident energies are given in the frame of E( 9 Be).…”

“…The largest refractive angle (rainbow angle, deflection angle) in the static potential is indicated by θ R . Because the projectile is easily excited, the strong coupling to the excited states [18,19,21] are indicated by the points.…”

“…Khoa [20] reproduced the angular distribution of the nuclear rainbow "ghost" using double folding model calculations with the M3Y force well by taking into account the finite-range exchange effect. Recently Glukhov et al [21] measured 16 O + 9 Be scattering at E( 16 O) = 132 MeV and reported the existence of an Airy minimum in the phenomenological optical model analysis.…”

“…FIG. 1: (Color online) The angular distributions of 9 Be+ 16 O scattering at (a) E( 9 Be)=157.7 MeV and (b) 74.25 MeV (E( 16 O)=132 MeV) calculated in a single channel (solid lines)are compared with the experimental data (points)[18,19,21]. The calculated cross sections are decomposed into the farside component (dashed lines) and the nearside component (dashdotted lines).…”