Reactions in theB8andLi8compound systems

Abstract

Calculations are reported for reactions in the 8 B and 8 Li compound systems with the recoil corrected continuum shell model. Comparison with observed structure indicates that the spin-orbit component of the M3Y interaction must be modified near the middle of the p shell. Calculations are performed with three spin-orbit strengths. The prediction for 7 Be(p, γ ) 8 B, based on this model and available data, is that S 17 (0) equals 21.63 eV b and S 17 (20) 21.02 eV b. Calculations for 7 Li(n, γ ) 8 Li indicate that the 8 Li, 1 + 2 state is nearly degenerate with the 3 + state. It is shown that a measurement of 7 Li(n, γ ) 8 Li(1 + 1 ) can locate the 0 + state. It is also shown that 7 Be(p, p ) 7 Be(1/2 − ) can locate the 1 + and 0 + strength in 8 B.

Recent results of experiments with radioactive 21Na and 7Be ion beams

“…Csoto [13] predicted a 1 + state at E x % 1.4 MeV, which was though not observed in experiments [10]. Very recently, Halderson [14] suggested that the known 3 + state is part of a group of three states which includes a 0 + and a 1 + state possibly energetically degenerate with the 3 + . We here report on first results from an elastic and inelastic scattering experiment using a radioactive 7 Be beam impinging on thin polyethylene targets.…”

Combiningab initiocalculations and low-energy effective field theory for halo nuclear systems: The case of7Li+n→8Li+γ

“…(See also Refs. [25,26] for similar results using methods related to the "traditional" shell model. )…”

Determining the7Li(n,γ) cross section via Coulomb dissociation of8Li

“…In addition to the models described in the experimental papers [12,15,16], many theoretical calculations have described the available data (see for example [41][42][43][44][45][46][47][48]). …”