Structure of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>23</mml:mn></mml:msup></mml:math>Al from the one-proton breakup reaction and astrophysical implications

Banu, A.; Trache, L.; Cârstoiu, F.; Achouri, N. L.; Bonaccorso, A.; Catford, W. N.; Chartier, M.; Dimmock, Matthew; Fernández–Domínguez, B.; Freer, M.; Gaudefroy, L.; Horoi, Mihai; Labiche, M.; Bouchet, L.; Lemmon, R. C.; Negoiţă, F.; Orr, N. A.; Paschalis, S.; Patterson, N.; Paul, E. S.; Petri, M.; Pietras, B.; Roeder, B. T.; Rotaru, F.; Roussel‐Chomaz, P.; Simmons, E.; Thomas, J. S.; Tribble, R. E.

doi:10.1103/physrevc.84.015803

Cited by 26 publications

(32 citation statements)

References 48 publications

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“…A. 12 C( 23 Al, 22 Mg)X at 50 MeV/u Recently, the 12 C( 23 Al, 22 Mg)X knockout reaction has been studied at 50 MeV/nucleon to investigate the ground state properties of 23 Al [9]. It was shown that the ground-state structure of 23 Al is a configuration mixing of a d -orbital valence proton coupled to four core states of 22 Mg -0 + gs , 2 + 1 , 4 + 1 , 4 + 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, the cross sections for one-proton removal reac-tions X → Y + p are directly related to the non-resonant part of the astrophysical S-factors for the inverse radiative proton capture Y(p,γ)X (see, e.g., Refs. [4,[6][7][8][9]). Again, the results and their reliability depend directly on the reliability and accuracy of the reaction calculations (as discussed in [10]).…”

Section: Introductionmentioning

confidence: 99%

“…(Color online). Comparison of experimental data of Ref [9]. and calculations for exclusive longitudinal momentum distributions in the knockout reaction 12 C( 23 Al,22 Mg)X at 50 MeV/nucleon.…”

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confidence: 99%

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Coulomb distortion and medium corrections in nucleon-removal reactions

et al. 2013

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One-nucleon removal reactions at or above the Fermi energy are important tools to explore the single-particle structure of exotic nuclei. Experimental data must be compared with calculations to extract structure information, evaluate correlation effects in nuclei or determine reaction rates for nuclear astrophysics. However, there is insufficient knowledge to calculate accurately the cross sections for these reactions. We evaluate the contributions of the final state interaction (FSI) and of the medium modifications of the nucleon-nucleon interactions and obtain the shapes and magnitudes of momentum distributions. Such effects have been often neglected in the literature. Calculations for reactions at energies 35 - 1000 MeV/nucleon are reported and compared to published data. For consistency, the state-of-the-art eikonal method for stripping and diffraction dissociation is used. We find that the two effects are important and their relative contributions vary with the energy and with the atomic and mass number of the projectile involved. These two often neglected effects modify considerably the one-nucleon removal cross sections. As expected, the effect are largest at lower energies, around 50 MeV/nucleon and on heavy targets.Comment: 12 pages, 10 figures. Accpeted for publication in the Physical Review C. arXiv admin note: text overlap with arXiv:nucl-th/0407026 by other author

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coulomb distortion and medium corrections in nucleon-removal reactions

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“…The only system that falls decisively into the regime of weak binding is the 5/2 + ground state of 23 Al, which has a small separation energy of S p =141 keV and a very large value of β ℓ,j (see Ref. [24] In such cases (encircled symbols), we plot η and β ℓ,j for the lowest-energy excited state that is populated by the capture with ℓ = 2 protons.…”

Section: Survey Of Proton Spancsmentioning

confidence: 99%

Asymptotic normalization coefficients and continuum coupling in mirror nuclei

et al. 2012

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Background: An asymptotic normalization coefficient (ANC) characterizes the asymptotic form of a one-nucleon overlap integral required for description of nucleon-removal reactions.Purpose: We investigate the impact of the particle continuum on proton and neutron ANCs for mirror systems from p-and sd-shell regions. Method:We use the real-energy and complex-energy continuum shell model approaches.Results: We studied the general structure of the single-particle ANCs as a function of the binding energy and orbital angular momentum. We computed ANCs in mirror nuclei for different physical situations, including capture reactions to weakly-bound and unbound states. Conclusions:We demonstrated that the single-particle ANCs exhibit generic behavior that is different for charged and neutral particles. We verified the previously proposed relation [1] between proton and neutron mirror ANCs. We find minor modifications if the spectroscopic strength is either localized in a single state or broadly distributed. For cases when several states couple strongly to the decay channel, these modifications may reach 30%.

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“…A more complete account of the experimental details may be found in Ref. [27]. The inclusive cross section for single-neutron removal from 31 Mg was determined to be 90±12 mb where the error arises principally from the uncertainty in the integrated secondary beam intensity.…”

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Re-examining the transition into the N = 20 island of inversion: Structure of 30Mg

et al. 2018

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Intermediate energy single-neutron removal from 31 Mg has been employed to investigate the transition into the N=20 island of inversion. Levels up to 5 MeV excitation energy in 30 Mg were populated and spin-parity assignments were inferred from the corresponding longitudinal momentum distributions and γ-ray decay scheme. Comparison with eikonal-model calculations also permitted spectroscopic factors to be deduced. Surprisingly, the 0 + 2 level in 30 Mg was found to have a strength much weaker than expected in the conventional picture of a predominantly 2p − 2h intruder configuration having a large overlap with the deformed 31 Mg ground state. In addition, negative parity levels were identified for the first time in 30 Mg, one of which is located at low excitation energy. The results are discussed in the light of shell-model calculations employing two newly developed approaches with markedly different descriptions of the structure of 30 Mg. It is concluded that the cross-shell effects in the region of the island of inversion at Z=12 are considerably more complex than previously thought and that np − nh configurations play a major role in the structure of 30 Mg.

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Structure of23Al from the one-proton breakup reaction and astrophysical implications

Cited by 26 publications

References 48 publications

Coulomb distortion and medium corrections in nucleon-removal reactions

Coulomb distortion and medium corrections in nucleon-removal reactions

Asymptotic normalization coefficients and continuum coupling in mirror nuclei

Re-examining the transition into the N = 20 island of inversion: Structure of 30Mg

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