Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range

Holl, M.; Panin, V.; Álvarez‐Pol, H.; Atar, L.; Aumann, T.; Beceiro-Novo, S.; Benlliure, J.; Bertulani, C. A.; Boillos, J. M.; Boretzky, K.; Caamaño, M.; Caesar, C.; Casarejos, E.; Catford, W. N.; Cederkäll, J.; Chulkov, L. V.; Cortina-Gil, D.; Cravo, E.; Dillmann, I.; Fernández, P.; Elekes, Z.; Enders, J.; Fraile, L. M.; Redondo, Daniel Galaviz; Gernhäuser, R.; Golubev, P.; Heftrich, T.; Heil, M.; Heine, M.; Heinz, A.; Henriques, A.; Johansson, H.; Jonson, B.; Kalantar‐Nayestanaki, N.; Kanungo, R.; Kelić-Heil, A.; Kröll, T.; Kurz, N.; Langer, C.; Bleis, T. Le; Lindberg, Simon; Machado, J.; Nácher, E.; Najafi, M. A.; Nilsson, T.; Nociforo, C.; Paschalis, S.; Petri, M.; Reifarth, R.; Ribeiro, G.; Rigollet, C.; Rossi, D.; Savran, D.; Scheit, H.; Simon, H.; Sorlin, O.; Syndikus, I.; Tengblad, O.; Togano, Y.; Vandebrouck, M.; Velho, P.; Wamers, F.; Weick, H.; Wheldon, C.; Wilson, G. L.; Winfield, J. S.; Woods, P. J.; Zhukov, M. V.; Zuber, Κ.

doi:10.1016/j.physletb.2019.06.069

Cited by 29 publications

(25 citation statements)

References 41 publications

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“…However, in spite of significant efforts, the problem remains. Experimental studies of (p, 2p) reactions on oxygen and carbon isotopes did not find a significant dependence of SFs on proton-neutron asymmetry [16,19]. A similar conclusion has been made in theoretical studies of neon isotopes and mirror nuclei 24 Si, 24 Ne and 28 S, 28 Mg [20].…”

supporting

confidence: 71%

Spectroscopic factors in dripline nuclei

Wylie,

Okołowicz,

Nazarewicz

et al. 2021

Preprint

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Single-nucleon knockout reaction studies of the proton-dripline nuclei 9 C and 13 O suggest an appreciable suppression of spectroscopic factors. In this work, we calculate the one-neutron and oneproton spectroscopic factors for the mirror pair 9 C-9 Li and 13 O using two variants of the continuum shell model: the complex-energy Gamow Shell Model and the real-energy Shell Model Embedded in the Continuum. Our results indicate that the continuum effects strongly suppress the spectroscopic factors of well-bound orbits in the dripline systems, but have less impact on the spectroscopic factors of weakly-bound states.

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supporting

confidence: 71%

Spectroscopic factors in dripline nuclei

Wylie,

Okołowicz,

Nazarewicz

et al. 2021

Preprint

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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: Introductionsupporting

confidence: 52%

“…Thanks to the development of radioactive isotope beam facilities, experiments on unstable nuclei in inverse kinematics have allowed us to explore nuclear structure far from the valley of stability. In particular, nucleon-knockout experiments with proton targets (p, pN) have regained popularity thanks to their simple reaction dynamics, their capacity to remove deeply bound nucleons [1][2][3][4], and the possibility of exploring very rare isotopes using inverse kinematics.…”

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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“…The figure is reprinted from Ref. [30] Recently, a few extended ( p, 2 p) and ( p, pn) studies in inverse kinematics using different carbon, nitrogen and oxygen isotopes were reported [31][32][33], supporting the absence or small dependence of the reduction on the isospin asymmetry. In all reported cases, momentum distributions were found to be in a reasonable agreement with theoretical calculations [23].…”

Section: Single-particle Spectroscopic Strengthmentioning

confidence: 94%

Quasi-free scattering in inverse kinematics as a tool to unveil the structure of nuclei

2021

Self Cite

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Quasi-free scattering of electrons and protons has been extensively utilized in the past to study the single-particle structure of nuclei, clustering in light nuclei, and short-range correlated nucleon–nucleon pairs in nuclei. Recently, this approach has been applied in inverse kinematics using hydrogen targets. The characteristic features of this reaction and the experimental challenges and advantages of inverse-kinematics experiments are summarized. The applicability to radioactive beams opens a large research potential to study a variety of properties of neutron-to-proton asymmetric nuclei. Applications of quasi-free scattering in inverse kinematics and its potential are reviewed based on recent and ongoing research programs at different accelerator facilities worldwide.

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Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range

Cited by 29 publications

References 41 publications

Spectroscopic factors in dripline nuclei

Spectroscopic factors in dripline nuclei

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

Quasi-free scattering in inverse kinematics as a tool to unveil the structure of nuclei

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