Strong coupled-channels effects in the 9Be(α, t)10B reaction

Dimers based on the α + α potential and chain states of carbon isotopes

“…In Fig. 3 we show the evidence for the rotational exitations in 9 Be from inelastic α-scattering [12]. For the rotational bands in 10 Be, Fig.…”

“…For 12 Be there is little information available so far. If we fill 4 neutrons into the molecular orbitals (π 3/2 − ) and (σ 1/2 + ) we expect a rather compact shape for 12 Be similar to 10 Be 0 + ,gs due to the (σ 1/2 + ) 2 × (π 3/2 − ) 2 configuration.…”

“…We repeat here the evidence for rotational bands in 9 Be and 10 Be. This evidence is based mostly on inelastic α-scattering [12], (α, 3 He) reactions [12] as well as (d, p) reactions on 9 Be [14]. The strong population of states shows their direct relation to the 9 Be ground state, which has a large deformation.…”

“…2a). From the spin assignments given Single neutron stripping reactions on 9 Be populating strong single particle states in 10 Be, in particular the rotational bands of the dimers (adopted from [12,14]). a the 9 Be(d, p)reaction; b the 9 Be(α, 3 He)reaction (in comparison with the reactions (α, t) and ( 3 He, d) leading to states in 10 B).…”

“…After the well established structure of 8 Be, which shows a rotational band based on a two-α-particle structure, the second 0 + 2 at 7.65 Mev in 12 C has been proposed [3,4] to be a chain of three α-particles. Various approaches based on a cranked cluster model have confirmed that such structures exist [5] not only in 12 C but also in other nuclei. Experimental evidence exists for example for 16O [6] and recently also for 24 Mg [7].…”