Toward a reliable description of 
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 reactions in the distorted-wave impulse approximation

Phuc, Nguyen Tri Toan; Yoshida, K.; Ogata, Kazuyuki

doi:10.1103/physrevc.100.064604

Cited by 14 publications

(14 citation statements)

References 56 publications

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“…Notably, the recently extracted SFs for the oxygen isotopic chain from quasi-free knockout reactions also show a very weak dependence on proton-neutron asymmetry [72,73] as opposed to the findings in heavy-ion induced knockout reactions. Later analysis with different theoretical methods show a consistent weak dependence [74,75]. Similarly to the heavy-ion induced knockout reactions, the momentum distributions from ( p, pN ) reactions are also sensitive to the orbital angular momentum of the ejected nucleon [65,[76][77][78].…”

Section: LImentioning

confidence: 99%

Breakup reactions and their ambiguities

2021

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We review the ambiguities in the nuclear information extracted from breakup reactions, focusing on those originating from the description of the reaction mechanism and the overall ambiguity inherent to their interpretation in terms of shell occupancies. We present the current discussion about nucleon knockout reactions and how the understanding of the reaction mechanism would help reducing uncertainties. For the former, we consider the case of $$^{11}$$ 11 Li, due to the existing large data set. For the latter, we recall the paradigmatic example of the electro-dissociation of the deuteron to address the question of the scale and scheme dependence from the theoretical framework used for the interpretation.

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Section: LImentioning

confidence: 99%

Breakup reactions and their ambiguities

2021

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“…A total of 7 resonances were measured. The authors of the paper [11] analyze the (p, 2p) and (p, pn) reactions data measured, in inverse kinematics, at GSI (Darmstadt, Germany) for carbon, nitrogen and oxygen isotopes in the incident energy range of 300-450 MeV/u (see [12] and references therein).…”

Section: ( )mentioning

confidence: 99%

Polarization Effects in the Reaction d+eˉ → d+eˉ

2021

EEJP

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The differential cross section and polarization observables for the elastic reaction induced by deuteron scattering off electrons at rest, are calculated in the one-photon-exchange approximation. The following polarization observables were calculated: 1- the analyzing powers (asymmetries) due to the tensor polarization of the deuteron beam, 2 - the spin correlation coefficients caused by the arbitrarily polarized electron target and the vector polarized deuteron beam, 3 - the coefficients of the polarization transfer from the arbitrarily polarized target electron to the recoil electrons. The differential cross section and polarization observables have been expressed in terms of the deuteron electromagnetic form factors: (charge monopole), (magnetic dipole) and (charge quadrupole). Numerical estimations are given for the analyzing powers (asymmetries) due to the tensor polarization of the deuteron beam. They are calculated as functions of the deuteron beam energy for some values of the scattering angle (the angle between the deuteron beam and the recoil electron momenta). For the numerical calculation we use the existing phenomenological parametrization of the deuteron electromagnetic form factors. It turns out that the analyzing powers (asymmetries) are increasing with the growth of the deuteron beam energy and they have appreciable sensitivity to the value of the scattering angle. The specific interest of this reaction is to investigate the possibility to use this reaction for the measurement of the polarization of the high energy deuteron beams.

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“…Although very recent results of (p, pN) reactions on isotopic chains for oxygen [1,3] and carbon [4] have found a small dependence of the reduction factors on S, in agreement with the transfer results, for these results to be reliable, the accuracy of the description of the reaction must be ascertained. At present, multiple reaction models have been used to describe the (p, pN) process: the distorted-wave impulse approximation (DWIA) was extensively used in the 1960s and 1970s [15,16] and has recently been revisited in quantummechanical [3,17] and eikonal [1,4,18] descriptions. The Faddeev-Alt-Grassberger-Sandhas (Faddeev-AGS) [2,[19][20][21] and transfer-to-the-continuum [22][23][24] formalisms have also been employed for the description of (p, pN) reactions, using very different descriptions to the DWIA approach.…”

Section: Introductionmentioning

confidence: 99%

Benchmarking Faddeev and transfer-to-the-continuum calculations for ( p,pN ) reactions

2020

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Background: Nucleon-knockout reactions on proton targets (p, pN) have experienced a renewed interest due to the availability of inverse-kinematics experiments with exotic nuclei. Various theoretical descriptions have been used to describe these reactions, such as the distorted-wave impulse approximation, the Faddeev-type formalism, and the transfer-to-the-continuum method. Purpose: Our goal is to benchmark the observables computed with the Faddeev and transfer-to-the-continuum formalisms in the intermediate energy regime relevant for the experimental (p, pn) and (p, 2p) studies. Method:We analyze the 11 Be(p, pn) 10 Be reaction for different beam energies, binding energies, and orbital quantum numbers with both formalisms to assess their agreement for different observables. Results: We obtain a good agreement in all cases considered, within ≈10%, when the input potentials are taken consistently and realistically. Conclusions: The results of this work prove the consistency and accuracy of both methods, setting an indication on the degree of systematic uncertainties applicable when using them to extract spectroscopic information from (p, pN) reactions.

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Toward a reliable description of (p,pN) reactions in the distorted-wave impulse approximation

Cited by 14 publications

References 56 publications

Breakup reactions and their ambiguities

Breakup reactions and their ambiguities

Polarization Effects in the Reaction d+eˉ → d+eˉ

Benchmarking Faddeev and transfer-to-the-continuum calculations for ( p,pN ) reactions

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