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Article: Three-body breakup of 6He and its halo structure

TitleThree-body breakup of 6He and its halo structure
Authors
Keywords12C(6He, α+2n)X
208Pb(6He, α+2n)X
Coulomb breakup
Electric dipole response
Halo nuclei
Issue Date2021
PublisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb
Citation
Physics Letters B, 2021, v. 814, p. article no. 136072 How to Cite?
AbstractThe Borromean halo nucleus 6He has been studied by a kinematically complete measurement of Coulomb and nuclear breakup into α + 2n on Pb and C targets at 70 MeV/nucleon. Fully quantum-mechanical four-body breakup calculations reproduce the energy and angular differential cross sections below Erel∼1 MeV for both targets. The model used here reproduces the 6He ground-state properties as well as α-n and n-n scattering data and predicts an average opening angle 〈θnn〉 of 68∘ between the two halo neutrons. However, the model underestimates the breakup cross sections for higher Erel, indicating a possible contribution from the inelastic breakup. Alternatively, we examine the empirically modified calculations that reproduce the energy-differential cross sections for a wide range of scattering angles for both targets. The extracted B(E1) peaks at Erel∼1.4 MeV and amounts to 1.6(2) e2 fm2 for Erel ≤ 20 MeV, resulting 〈θnn〉 = 56−10+9 degrees. In either interpretation, the current results show evidence of the dineutron spatial correlation in 6He. © 2021 The Author(s)
Persistent Identifierhttp://hdl.handle.net/10722/298671
ISSN
2023 Impact Factor: 4.3
2023 SCImago Journal Rankings: 1.593
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSun, YL-
dc.contributor.authorNakamura, T-
dc.contributor.authorKondo, Y-
dc.contributor.authorSatou, Y-
dc.contributor.authorLee, J-
dc.contributor.authorMatsumoto, T-
dc.contributor.authorOgata, K-
dc.contributor.authorKikuchi, Y-
dc.contributor.authorAoi, N-
dc.contributor.authorIchikawa, Y-
dc.contributor.authorIeki, K-
dc.contributor.authorIshihara, M-
dc.contributor.authorKobayshi, T-
dc.contributor.authorMotobayashi, T-
dc.contributor.authorOtsu, H-
dc.contributor.authorSakurai, H-
dc.contributor.authorShimamura, T-
dc.contributor.authorShimoura, S-
dc.contributor.authorShinohara, T-
dc.contributor.authorSugimoto, T-
dc.contributor.authorTakeuchi, S-
dc.contributor.authorTogano, Y-
dc.contributor.authorYoneda, K-
dc.date.accessioned2021-04-12T03:01:45Z-
dc.date.available2021-04-12T03:01:45Z-
dc.date.issued2021-
dc.identifier.citationPhysics Letters B, 2021, v. 814, p. article no. 136072-
dc.identifier.issn0370-2693-
dc.identifier.urihttp://hdl.handle.net/10722/298671-
dc.description.abstractThe Borromean halo nucleus 6He has been studied by a kinematically complete measurement of Coulomb and nuclear breakup into α + 2n on Pb and C targets at 70 MeV/nucleon. Fully quantum-mechanical four-body breakup calculations reproduce the energy and angular differential cross sections below Erel∼1 MeV for both targets. The model used here reproduces the 6He ground-state properties as well as α-n and n-n scattering data and predicts an average opening angle 〈θnn〉 of 68∘ between the two halo neutrons. However, the model underestimates the breakup cross sections for higher Erel, indicating a possible contribution from the inelastic breakup. Alternatively, we examine the empirically modified calculations that reproduce the energy-differential cross sections for a wide range of scattering angles for both targets. The extracted B(E1) peaks at Erel∼1.4 MeV and amounts to 1.6(2) e2 fm2 for Erel ≤ 20 MeV, resulting 〈θnn〉 = 56−10+9 degrees. In either interpretation, the current results show evidence of the dineutron spatial correlation in 6He. © 2021 The Author(s)-
dc.languageeng-
dc.publisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb-
dc.relation.ispartofPhysics Letters B-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subject12C(6He, α+2n)X-
dc.subject208Pb(6He, α+2n)X-
dc.subjectCoulomb breakup-
dc.subjectElectric dipole response-
dc.subjectHalo nuclei-
dc.titleThree-body breakup of 6He and its halo structure-
dc.typeArticle-
dc.identifier.emailLee, J: jleehc@hku.hk-
dc.identifier.authorityLee, J=rp01902-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1016/j.physletb.2021.136072-
dc.identifier.scopuseid_2-s2.0-85099611157-
dc.identifier.hkuros322095-
dc.identifier.volume814-
dc.identifier.spagearticle no. 136072-
dc.identifier.epagearticle no. 136072-
dc.identifier.isiWOS:000621722300025-
dc.publisher.placeNetherlands-

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