A study of proton breakup from exotic nuclei through various reaction mechanisms in 40A - 80AMeV energy range

Ravinder Kumar,Angela Bonaccorso,S Lunardi,C Bucci,A Nannini,R Menegazzo,A Dainese,M Chiari,J.J Valiente-Dobon,C Signorini,P.G Bizzeti,P Di Nezza

doi:10.1051/epjconf/20146603051

Abstract

We have studied the single proton breakup from weakly bound exotic nuclei due to several reaction mechanisms separately and their total and the interference effects, in order to clarify quantitatively which mechanism would dominate the measured observables. We have considered: (i) the recoil effect of the core-target Coulomb potential which we distinguish from the direct proton-target Coulomb potential, and (ii) nuclear breakup, which consists of stripping and diffraction. Thus, we have calculated the absolute values of breakup cross sections and parallel momentum distributions (LMD) for 8 B and 17 F projectiles on a light and a heavy target in a range of intermediate incident energies (40A-80A MeV) for each reaction mechanism. Furthermore the interference among the two Coulomb effects and nuclear diffraction has been studied in detail. The calculation of the direct and recoil Coulomb effects separately and of their interference is the new and most relevant aspect of this work.

Highlights

In the present work we have studied the breakup reactions of 8B and 17F on a light and a heavy target in a range of 40A MeV to 80A MeV incident energies, because this is a typical energy range used in most laboratories worldwide and for which our results should be reliable
We have calculated longitudinal momentum distribution and absolute cross sections due to the nuclear and Coulomb breakup separately and show how much the interference effects modify the simple sum of the cross sections
We have studied all mechanisms that can produce breakup of a weakly bound proton in the reactions of 8B and 17F nuclei impinging on a light and a heavy target

Summary

Introduction

The cross sections due to the stripping and diffraction mechanisms and the direct and recoil terms of Coulomb breakup are shown separately. We give the total Coulomb cross sections, which contain the interference effects of direct and recoil terms.

Results

Conclusion