Rescattering effects in proton elastic scattering from halo nuclei: A test of the Glauber approximation

Improved description ofAr34,36,46(p,d) transfer reactio

“…It has been pointed out that different beam energies could be at the heart of the disagreement since nuclear knockout experiments were all performed at around 70 MeV/u while the transfer measurement were done at 33 MeV/u. Consequently, the 34,36,46 Ar(p,d) experiments have been repeated at higher energy and the analysis is in progress. Despite this aspect, from the theoretical point of view, it is pertinent to inspect the reaction theory used in the analyzes and evaluate the uncertainties.…”

“…In this work we will re-analyze the results from [9] with the finite-range version of ADWA and using this improved reaction theory obtain the reduction factor for 34,36,46 Ar (Section II). We will also estimate uncertainties associated with the reaction theory, namely in what pertains the interaction and in the three-body reaction dynamics (Section III).…”

“…As in previous systematic studies [26], the recent 34,36,46 Ar(p,d) data [9] were analyzed using the adiabatic wave model (ADWA) developed by Johnson and Soper [27]. This model provides an improvement over distorted wave Born approximation (DWBA) in that it takes deuteron breakup into account explicitly, however it also makes a zero-range approximation, reducing the accuracy of the method.…”

“…Motivated by the exciting results from nuclear knockout experiments, transfer reactions 34,36,46 Ar(p,d) were performed at 33 MeV/u, with the intention of studying the dependence of the reduction factor on the asymme-try R(∆S). Results published in [9] show a clear disagreement on the trend of the reduction factor: while in knockout experiments one observes a strong variation of the reduction factor, in transfer data no such dependence is present.…”

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An improved description of single neutron stripping from 34,36,46 Ar beams at 33 MeV/nucleon by a hydrogen target is presented and the dependence on the neutron-proton asymmetry of the spectroscopic factors is further investigated. A finite range adiabatic model is used in the analysis and compared to previous zero range and local energy approximations.

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