Projectile structure effects in the Coulomb breakup of one-neutron halo nuclei

Abstract

We investigate the Coulomb breakup of neutron rich nuclei 11 Be and 19,17,15 C within a theory developed in the framework of Distorted Wave Born Approximation. Finite range effects are included by a local momentum approximation, which allows incorporation of realistic wave functions for these nuclei in our calculations. Energy and angular as well as parallel momentum distributions of the fragments emitted in the breakup of these nuclei on heavy targets have been calculated using several structure models for their ground state. Comparison with the available experimental data shows that the results are selective about the ground state wave function of the projectile. Our investigations confirm that the nuclei 11 Be, 19 C and 15 C have a one-neutron halo structure in their ground states. However, for 17 C such a structure appears to be less likely. Calculations performed within our method have also been compared with those from an adiabatic model and the results are discussed. PACS numbers: 21.10. Hw, 24.10.Eq, 25.60.Gc Key words: Coulomb breakup, one-neutron halo nucleus, effects of projectile structure.

Four-body DWBA calculations of the Coulomb breakup of 6He

“…[24] that this approximation is well satisfied for the breakup of one-neutron halo nuclei. Furthermore, this gave results [24] which were similar to those obtained within an adiabatic model (AD) [38] of Coulomb breakup reactions. This theory allows the use of a realistic three-body wave function for the projectile ground state and can be applied to breakup reactions with beam energies ranging from below the Coulomb barrier to higher values up to which the non-relativistic treatment is valid.…”

“…It was shown in Ref. [24] that this approximation is well satisfied for the breakup of one-neutron halo nuclei. Furthermore, this gave results [24] which were similar to those obtained within an adiabatic model (AD) [38] of Coulomb breakup reactions.…”

“…In the application of the ELMA in the description of the heavy ion induced transfer reactions [57] and the breakup reaction of the one-neutron halo nuclei [24], the calculated cross sections were found to be almost unaffected by the choice of the direction of the local momentum. To study the sensitivity of our FRDWBA results on the direction of K for reactions under study in this paper, we have performed calculations for three cases where we take the angles of the local momentum (d 1 ) parallel to those of k b , (d 2 ) parallel to the direction corresponding to the half of the angles of k b and (d 3 ) parallel to the beam direction (zero angles).…”

“…Breakup reactions, in which the valence neutrons are removed from the core in the interaction of halo nuclei with stable targets, provide detailed information on their structures [24]. The study of the breakup reaction of 6 He is interesting due to several reasons.…”

Structural effects of Na34 in the Na33(n,γ)NaSingh1, Shubhchintak2, Chatterjee3 2017Phys. Rev. C10060View full textAdd to dashboardCite

“…The behaviour of neutron capture rates for the uncertain ground state spin of 34 Na is also discussed. Eventually, we compare the rate of the 33 Na(n,γ) 34 Na capture reaction with that of 33 Na(α,n) 36 Al reaction as obtained from the Hauser-Feshbach (HF) model using the NON-SMOKER code [35] and conclude that at the physical conditions specified, the probability of a neutron capture is greater than that of an α-capture.…”