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REVIEW 4 major objections 4 minor 58 references

The southern shore of the island of inversion studied via quasi-free scattering

T0 review · 4 major / 4 minor · reviewed 2026-08-11 · deepseek-v4-flash

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Pith's one-line read Quasi-free scattering data show that the N=20 shell gap vanishes in oxygen and fluorine, so 28O is not doubly magic and its neutron pairs behave superfluid-like.

desk verdict A clear, useful review of the RIBF/SAMURAI campaign on the most neutron-rich O and F isotopes, but the 'direct' demonstration of N=20 breakdown in 28O rests on one five-body resonance plus shell-model inference. read the letter →

arxiv 2412.16799 v1 pith:HJ5LFWJX submitted 2024-12-21 nucl-ex nucl-th

J. Kahlbow This is my paper · ORCID
classification nucl-exnucl-th
keywords IslandofInversionN=20magicnumberquasi-freeknockoutinvariant-massspectroscopyoxygen-28fluorineisotopesnuclearsuperfluidityneutronhalo
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This review argues that the neutron magic number N=20 is not restored in the most neutron-rich fluorine and oxygen isotopes, and that these nuclei belong to the "island of inversion" — the region around Z=12, N=20 where the expected shell gap collapses and deformed intruder configurations win. The evidence comes from quasi-free knockout reactions with kinematically complete detection, which reconstruct the unbound decays of 28F, 30F, 27O, and 28O, including the first observation of 28O through its five-body decay into 24O plus four neutrons. If the argument holds, 28O is not the doubly magic nucleus it was once expected to be, and the neutron-rich edge of the chart is dominated by quenched shell gaps, p-wave intruder orbits, two-neutron halos, and superfluid-like pairing. The review also reports that large-scale shell-model calculations with the SDPF-U-MIX20 interaction reproduce the data and predict a complete collapse of the N=20 gap by Z=8, strengthening the case that oxygen and fluorine have joined the island of inversion.

What carries the argument

The experimental machinery is quasi-free knockout: a beam nucleus strikes a proton in a liquid-hydrogen target, the knocked-out proton and the residue are tracked, and the unbound decay products (charged fragment plus one to four neutrons) are detected in coincidence, so each state is reconstructed as an invariant-mass peak and its transverse-momentum distribution tags the orbital angular momentum $\ell$ of the struck nucleon. On the theory side, the SDPF-U-MIX20 shell-model interaction supplies effective single-particle energies showing the N=20 gap shrinking from roughly 15 MeV at Z=14 to about 2 MeV at Z=8, with the 1p3/2 and 1p1/2 neutron orbitals dropping below 0f7/2. That gap collapse is the mechanism that puts the F and O isotopes into the island of inversion.

What would settle it

A future measurement that fails to reproduce the 0.46 MeV peak in the 24O+4n invariant-mass spectrum under independent efficiency and crosstalk corrections, or that finds a 2+ excited state with a large shell-gap-like energy separation, would settle against the paper's claim that 28O belongs to the island of inversion.

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Extended reading notes

Core claim

On the evidence of this experimental campaign, the N=20 neutron magic number is quenched in the fluorine isotopes and, by extension, in oxygen: 28F has a p-wave ground state with the p and f orbitals inverted, 30F shows no sharp drop in the one-neutron separation energy beyond N=20, and 28O appears as a low-lying resonance at 0.46 MeV in its four-neutron decay, with its measured spectroscopic strength implying a structure very similar to 29F. The expected 2+ excited state of 28O was not identified, most likely because of limited statistics. Together with SDPF-U-MIX20 calculations that make the sd and pf shells nearly degenerate at Z=8, the data place 28O and the F isotopes in the island of inversion, so 28O is not a doubly magic nucleus; the same calculations find that 28O has 97% of its neutron pairs coupled to J=0 and 29F about 70%, a pairing-dominated regime the paper labels superfluidity.

Load-bearing premise

The argument rests on the identification of the 0.46 MeV peak in the 24O+4n invariant-mass spectrum as the 28O ground state, even though the four-neutron detection efficiency is no more than 0.4% and the expected 2+ state was not observed; if efficiency losses or crosstalk rejection create or shift that peak, the oxygen conclusion loses its anchor.

Editorial extensions

If this is right

  • The N=20 neutron magic number is not restored in the fluorine isotopes, and the same conclusion now applies to 28O, placing both oxygen and fluorine inside the island of inversion.
  • 28O, the last candidate doubly magic nucleus beyond 24O, is not doubly magic; its ground state is an unbound resonance at 0.46 MeV above the 24O+4n threshold, and its neutron configuration closely resembles that of 29F.
  • The sd and pf shells become nearly degenerate at Z=8, with the 1p3/2 and 1p1/2 neutron orbitals dropping below 0f7/2, so valence neutrons occupy p-wave intruder orbits rather than the usual d3/2 orbital.
  • Pairing-dominated structure emerges at the southern shore: shell-model wave functions give 97% J=0 neutron pairs in 28O and about 70% in 29F, a regime the paper labels superfluidity.
  • 29F combines weak binding, dominant p-wave occupancy, and an extended matter radius, supporting a two-neutron halo; a similar halo is predicted for 31F.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • If the island picture is right, the same quenched N=20 gap should show up in neighboring Z=6 carbon isotopes near N=20 once they become experimentally reachable; the paper does not claim this, but its monopole-driven gap-collapse mechanism is monotonic with proton number.
  • The superfluid claim is inferred from J=0 pair fractions in shell-model wave functions; a direct experimental test would be to measure the opening angle or momentum correlation of the decay neutrons from 28O or 29F, which would distinguish BCS-like extended pairs from BEC-like compact dineutrons — the paper calls for such measurements but does not report them.
  • If the 2+ state of 28O is eventually found at low excitation energy, the pairing and superfluidity interpretation would be strengthened; if it is found high above the ground state, the quenched-gap picture would need revision even though the ground-state resonance itself would stand.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

4 major / 4 minor

Summary. This review article summarizes a series of SAMURAI/RIBF experiments using quasi-free scattering and invariant-mass spectroscopy to study the most neutron-rich fluorine and oxygen isotopes (28-30F, 27,28O). The author argues that these data show the breakdown of the N=20 magic number for both F and O isotopes, extending the island of inversion to Z=8, and identifies theoretical support from shell-model and ab-initio calculations, including claims of superfluid-like pairing in 28O and 29F. The paper is a review: the experimental results are drawn from previously published works (Refs. [10-12]) and the theoretical interpretations rely on several model calculations, some of which involve tuned parameters or interactions fitted to the same mass region.

Significance. If the central claims hold, the paper would establish that 28O is not a doubly magic nucleus and that the island of inversion extends to oxygen, with important implications for shell evolution, continuum coupling, and pairing in neutron-rich systems. The review is useful as a compact and readable summary of a sophisticated experimental campaign, and it candidly reports many limitations (e.g., four-neutron detection efficiency at most 0.4%, the absence of the 2+ state in 28O, unresolved resonances in 30F, and the -600 keV shift applied to the shell-model curve). However, the paper adds no new experimental or theoretical analysis, and its strongest conclusions go beyond what the data alone establish. The review's value lies in synthesis, and that synthesis would be strengthened by a clearer separation of direct experimental evidence from model-dependent inference.

major comments (4)
  1. [Sec. 3.3 and Sec. 4] The statement in Sec. 3.3 that the results 'unequivocally and directly demonstrate' that N=20 is not restored in the F isotopes, and the transfer of this conclusion to 28O in Sec. 4, overstates the evidential weight. For 28O the only experimental evidence is a single resonance at 0.46 MeV reconstructed from four-neutron coincidences with an efficiency of at most 0.4% (Sec. 2), and the 2+ state is explicitly not observed. A low-lying unbound ground state does not by itself quantify the shell gap; the conclusion that 28O belongs to the island of inversion relies on the SDPF-U-MIX20 shell-model calculation and on DWIA-based spin-parity and spectroscopic-factor assumptions. The review should explicitly attribute the oxygen conclusion to a combination of data and theory, not to a direct measurement.
  2. [Sec. 3.2 and Fig. 3] The 30F analysis compares the experimental relative-energy spectrum to a shell-model prediction that is shifted by -600 keV to match the data. This is a free adjustment that materially weakens the claim of a 'direct' demonstration of gap breakdown. In addition, the predicted 4- ground state has small C2S, while the higher 2- and 3- states are in better agreement with experiment, so the identification of the observed resonance with the ground state is model-dependent. The review should clearly state these caveats when using 30F as evidence for the persistence of the quenched N=20 gap beyond N=20.
  3. [Sec. 5.3] The theoretical support from continuum-coupling calculations is not independent of the conclusions it is used to corroborate. The SMEC calculation in Ref. [45] is described as having a 'continuum coupling strength' that 'remained a parameter... and was tuned', and the GSM calculation in Ref. [46] is described as 'a locally tuned interaction'. Furthermore, the SDPF-U-MIX20 interaction is fitted to data in the same mass region. The review should explicitly discuss this circularity when presenting these models as confirmation of the island-of-inversion picture for O and F.
  4. [Sec. 6 and Abstract] The superfluid claim for 28O and 29F is presented as a finding ('Signatures for the establishment of a superfluid regime in 28O and 29F are found' in the abstract), but it is entirely a shell-model prediction based on the seniority-zero content of the wave function (97% J=0 pairs in 28O). No experimental observable is measured that would directly establish superfluidity. The review should label this as a theoretical prediction, not an experimental signature, and should soften the abstract wording accordingly.
minor comments (4)
  1. [Sec. 3] There are several typographical errors: 'purpotedly' should be 'purportedly', 'f porbital' should be 'f orbital', and 'for28,29F' is missing a space.
  2. [Sec. 4 and Sec. 6] The phrase 'corner stone' appears twice and should be 'cornerstone'.
  3. [Sec. 5.4] The sentence 'Current efforts are direct to understanding' should read 'Current efforts are directed toward understanding'.
  4. [References] Ref. [45] is an arXiv preprint from 2002; if a peer-reviewed version exists, it should be cited instead. Refs. [49] and [50] are arXiv preprints; the authors should cite the published versions if available.

Circularity Check

1 steps flagged · score 2.0 of 10

Main magicity conclusion is experimentally anchored and not circular; only a minor self-cited, fitted-model superfluid interpretation raises the score slightly.

  1. other [Sec. 6 (Impact, 'Superfluidity') and Abstract]
    "According to these calculations, 28O exhibits 97% of neutron pairs coupled to J = 0 (seniority 0)... Such a regime in which pairs of nucleons equivalently occupy nearby orbitals is usually defined as superfluidity, which Ref. [12] proclaims in this region of the chart of nuclei for the first time."

    The abstract lists 'signatures for the establishment of a superfluid regime in 28O and 29F' as a finding, but the only support offered here is Ref. [12], on which the review author is a coauthor, and whose SDPF-U-MIX20 calculation is described in Sec. 5.1 as having residual two-body matrix elements 'determined through fits to experimental data.' The superfluidity is therefore an output of a fitted model imported through self-citation rather than an independent derivation or an experimentally measured quantity. It is not load-bearing for the experimentally anchored magicity conclusion, so this is a minor issue rather than full circularity.

full rationale

The experimental derivation chain is not circular. The N=20 breakdown for the F isotopes rests on measured invariant-mass spectra, resonance energies and widths, transverse-momentum distributions with eikonal-model fits, and the flat single-neutron separation-energy systematics beyond N=20 ('no sharp drop in Sn... directly signifying that the energy gap at N = 20 is not restored'), not on the fitted shell-model interaction. For 28O, the review explicitly acknowledges that the 2+ state has not been identified and phrases the oxygen conclusion as 'a similar conclusion can now be drawn for 28O as well,' i.e., an analogy from F plus theory comparisons rather than a quantity defined by the theory. The theory curves are also transparently flagged as fitted, tuned, shifted, or normalized: the 30F shell-model spectrum is 'shifted by -600 keV' and 'normalized to the data up to 2.5 MeV'; the SMEC continuum-coupling strength 'remained a parameter... and was tuned'; and the Michel GSM is called a 'locally tuned interaction.' These are limitations and model-dependence concerns, not cases where a prediction is equivalent to its input by construction. The only mild issue is the superfluid claim in Sec. 6, which is imported from the author's own Ref. [12] and depends on the fitted SDPF-U-MIX20 interaction; the review does attribute it to the calculation, and that claim does not carry the central island-of-inversion conclusion, so the overall circularity score is low.

Assumptions & free parameters 5 free parameters · 4 assumptions · 0 invented entities

The review's physical conclusions are imported from cited experiments and from the author's own fitted shell-model calculations. The key interpretative claim, superfluidity, is read off pair occupancies of an interaction fitted in the same mass region, so the ledger is dominated by prior fitted model parameters rather than by new data introduced here.

free parameters (5)
  • SDPF-U-MIX20 interaction parameters = fitted in Refs. [2,12], not quoted in this review
    The N=20 gap of about 2 MeV at Z=8, the p-f inversion, and the 97%/70% J=0 pair occupancies used to claim superfluidity all come from this interaction, which is adjusted to data in the sd-pf region.
  • 30F shell-model energy shift = -600 keV
    Sec. 3.2 and Fig. 3: the theory spectrum is shifted by -600 keV to overlay the data, so the agreement contains a fitted offset.
  • SMEC continuum coupling strength = tuned, value not quoted
    Sec. 5.3, Ref. [45]: the magnitude of the continuum coupling strength is a tuned parameter in the shell-model embedded in the continuum calculation.
  • Michel locally tuned interaction = tuned to experiment
    Sec. 5.3, Ref. [46]: the interaction is locally tuned and limited to a 24O core with restricted valence orbitals, so its agreement with Sn data is not an independent prediction.
  • Fortunato 29F wave function percentages = 57.5% (1p3/2)^2, 28.1% (0d3/2)^2, 6% (0f7/2)^2
    Sec. 6, Ref. [53]: the configuration is adjusted to reproduce Ref. [11], so the resulting halo-size estimate is constrained by the data it claims to explain.
assumptions (4)
  • domain assumption Quasi-free knockout is sudden and one-step, so the momentum of the removed nucleon is the mirror of the A-1 residue momentum.
    Sec. 2 invokes p_A-1 = -p_N, and Sec. 3.1 and Fig. 2 compare measured transverse-momentum distributions to eikonal-model calculations to assign orbital angular momenta.
  • domain assumption Invariant-mass reconstruction of multi-neutron final states is unbiased after crosstalk rejection and efficiency corrections, including at a two-neutron efficiency below 15% and a four-neutron efficiency of at most 0.4%.
    Sec. 2 quotes these efficiencies, and Sec. 4 depends on the five-body reconstruction for the 28O ground-state identification.
  • domain assumption The SDPF-U-MIX20 shell-model interaction reliably describes weakly bound and unbound O/F nuclei although it does not explicitly include continuum coupling and three-nucleon forces.
    Sec. 5.1 uses it to conclude the N=20 gap collapses and to infer pair occupancies; Sec. 5.3 concedes continuum is only partially accounted for.
  • domain assumption 27O and 28O decay dominantly in sequential decay mode through 26O(g.s.).
    Sec. 4 states this decay path and uses it to model the measured relative-energy spectra.

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Cite this review

Pith. "Pith review of The southern shore of the island of inversion studied via quasi-free scattering." pith.science (2026). https://pith.science/paper/HJ5LFWJX

@misc{pith2026241216799,
  author       = {Pith},
  title        = {Pith review of: The southern shore of the island of inversion studied via quasi-free scattering},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/HJ5LFWJX}},
  note         = {Machine review of arXiv:2412.16799}
}
read the original abstract

Neutron-rich nuclei exhibit a variety of intriguing features associated with nuclear structure evolution, deformation, and other phenomena. Particularly interesting is the region in the chart of nuclides around Z = 12 and N = 20, commonly referred to as "Island of Inversion", which is profoundly influenced by these features. Recent cutting-edge experiments performed at SAMURAI/RIBF have investigated the structure of the most neutron-rich O and F isotopes, including 27,28O and 28-30F, utilizing quasi-free scattering and invariant-mass spectroscopy techniques. This experimental campaign manifests the breakdown of the N = 20 magicity for O and F isotopes, placing them within the "Island of Inversion", as is discussed in this review article. The results are further supported by theoretical analyses employing state-of-the-art shell-model and ab-initio calculations. These nuclei serve as corner stones for the study of weak binding and continuum coupling, deformation, and halo formation. Signatures for the establishment of a superfluid regime in 28O and 29F are found. Future experimental and theoretical studies are needed to examine details.

Figures

Figures reproduced from arXiv: 2412.16799 by the authors.

Figure 4
Figure 4. 5.2 Ab-initio calculations First-principle ab-initio approaches seek to derive the effective nuclear interaction from fundamental QCD symmetries that in the highest possible resolution describe the effective nuclear interaction. One very successful method among these ab-initio theories are chiral Effective Field Theories (EFT), which are constrained by a limited number of coupling 12 [PITH_FULL_IMAGE:figures/full_f… view at source ↗

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Reference graph

Works this paper leans on

58 extracted references · 31 canonical work pages

  1. [45]

    Y. Luo, J. Okolowicz, M. Ploszajczak, and N. Michel. Shell model embedded in the continuum for bind- ing systematics in neutron-rich isotopes of oxygen and fluor, 2002. URL https://arxiv.org/abs/nucl-th/ 0211068

    work page 2002

  2. [46]

    Michel, J

    N. Michel, J. G. Li, F. R. Xu, and W. Zuo. Two-neutron halo structure of 31F. Phys. Rev. C , 101:031301, Mar

    work page

  3. [1]

    E. K. Warburton, J. A. Becker, and B. A. Brown. Mass systematics for A = 29 − 44 nuclei: The deformed A ∼ 32 region. Phys. Rev. C , 41:1147–1166, Mar 1990. doi: 10.1103/PhysRevC.41.1147. URL https://link. aps.org/doi/10.1103/PhysRevC.41.1147

    doi:10.1103/physrevc.41.1147 1990

  4. [2]

    Caurier, F

    E. Caurier, F. Nowacki, and A. Poves. Merging of the islands of inversion at N = 20 and N = 28. Phys. Rev. C, 90:014302, Jul 2014. doi: 10.1103/PhysRevC.90.014302. URL https://link.aps.org/doi/10.1103/ PhysRevC.90.014302

    doi:10.1103/physrevc.90.014302 2014

  5. [3]

    Otsuka, A

    T. Otsuka, A. Gade, O. Sorlin, T. Suzuki, and Y. Utsuno. Evolution of shell structure in exotic nuclei. Rev. Mod. Phys. , 92:015002, Mar 2020. doi: 10.1103/RevModPhys.92.015002. URL https://link.aps.org/doi/ 10.1103/RevModPhys.92.015002

    doi:10.1103/revmodphys.92.015002 2020

  6. [4]

    Wimmer, T

    K. Wimmer, T. Kr¨ oll, R. Kr¨ ucken, V. Bildstein, R. Gernh¨ auser, B. Bastin, N. Bree, J. Diriken, P. Van Duppen, M. Huyse, N. Patronis, P. Vermaelen, D. Voulot, J. Van de Walle, F. Wenander, L. M. Fraile, R. Chapman, B. Hadinia, R. Orlandi, J. F. Smith, R. Lutter, P. G. Thirolf, M. Labiche, A. Blazhev, M. Kalk¨ uhler, P. Reiter, M. Seidlitz, N. Warr, A....

    work page 2010

  7. [5]

    Caurier, F

    E. Caurier, F. Nowacki, and A. Poves. The N = 28 shell closure; from N = Z to the neutron drip line. Nuclear Physics A , 742(1):14–26, 2004. ISSN 0375-9474. doi: https://doi.org/10.1016/j.nuclphysa.2004.06.032. URL https://www.sciencedirect.com/science/article/pii/S0375947404007663

    work page doi:10.1016/j.nuclphysa.2004.06.032 2004

  8. [6]

    H. L. Crawford, P. Fallon, A. O. Macchiavelli, P. Doornenbal, N. Aoi, F. Browne, C. M. Campbell, S. Chen, R. M. Clark, M. L. Cort´ es, M. Cromaz, E. Ideguchi, M. D. Jones, R. Kanungo, M. MacCormick, S. Momiyama, I. Murray, M. Niikura, S. Paschalis, M. Petri, H. Sakurai, M. Salathe, P. Schrock, D. Steppenbeck, S. Takeuchi, Y. K. Tanaka, R. Taniuchi, H. Wan...

    doi:10.1103/physrevlett.122 2019

Show all 58 references
  1. [7]

    H. L. Crawford, P. Fallon, A. O. Macchiavelli, R. M. Clark, B. A. Brown, J. A. Tostevin, D. Bazin, N. Aoi, P. Doornenbal, M. Matsushita, H. Scheit, D. Steppenbeck, S. Takeuchi, H. Baba, C. M. Campbell, M. Cromaz, E. Ideguchi, N. Kobayashi, Y. Kondo, G. Lee, I. Y. Lee, J. Lee, ...

    2014

  2. [8]

    Nowacki, A

    F. Nowacki, A. Obertelli, and A. Poves. The neutron-rich edge of the nuclear landscape: Experiment and theory. Progress in Particle and Nuclear Physics , 120:103866, 2021. ISSN 0146-6410. doi: https://doi.org/10.1016/j. ppnp.2021.103866. URL https://www.sciencedirect.com/scien...

    2021

  3. [9]

    Heylen, M

    H. Heylen, M. De Rydt, G. Neyens, M. L. Bissell, L. Caceres, R. Chevrier, J. M. Daugas, Y. Ichikawa, Y. Ishibashi, O. Kamalou, T. J. Mertzimekis, P. Morel, J. Papuga, A. Poves, M. M. Rajabali, C. St¨ odel, J. C. Thomas, H. Ueno, Y. Utsuno, N. Yoshida, and A. Yoshimi. High-prec...

    2016 doi

  4. [10]

    Kondo, N

    Y. Kondo, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, F. Delaunay, A. Delbart, Q. Deshayes, Zs. Dombr´ adi, C. A. Douma, A. Ekstr¨ om, Z. Elekes, C. Forss´ en, I. Gaˇ spari´ c, J.-M. Gheller, J. Gibel...

    2023

  5. [11]

    Revel, O

    A. Revel, O. Sorlin, F. M. Marqu´ es, Y. Kondo, J. Kahlbow, T. Nakamura, N. A. Orr, F. Nowacki, J. A. Tostevin, C. X. Yuan, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H. L. Crawford, F. Delaunay, A. ...

    2020

  6. [12]

    Kahlbow, T

    J. Kahlbow, T. Aumann, O. Sorlin, Y. Kondo, T. Nakamura, F. Nowacki, A. Revel, N. L. Achouri, H. Al Falou, L. Atar, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, F. Delaunay, A. Delbart, Q. Deshayes, Z. Dombr´ adi, C. A. Douma, Z. Elekes, I. Gaˇ spar...

    2024

  7. [13]

    M. Holl, S. Lindberg, A. Heinz, Y. Kondo, T. Nakamura, J. A. Tostevin, H. Wang, T. Nilsson, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H. L. Crawford, F. Delaunay, A. Delbart, Q. Deshayes, P. D ´ ıaz...

    2022

  8. [14]

    H. Wang, M. Yasuda, Y. Kondo, T. Nakamura, J.A. Tostevin, K. Ogata, T. Otsuka, A. Poves, N. Shimizu, K. Yoshida, N.L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H.L. Crawford, F. Delaunay, A. Delbart, Q. D...

    2023

  9. [15]

    Kobayashi, N

    T. Kobayashi, N. Chiga, T. Isobe, Y. Kondo, T. Kubo, K. Kusaka, T. Motobayashi, T. Nakamura, J. Ohnishi, H. Okuno, H. Otsu, T. Sako, H. Sato, Y. Shimizu, K. Sekiguchi, K. Takahashi, R. Tanaka, and K. Yoneda. SAMURAI spectrometer for RI beam experiments. Nuclear Instruments and...

    2013 doi

  10. [16]

    Jacob and Th

    G. Jacob and Th. A. J. Maris. Quasi-free scattering and nuclear structure. Rev. Mod. Phys. , 38:121–142, Jan

  11. [17]

    Hansen and J.A

    P.G. Hansen and J.A. Tostevin. Direct reactions with exotic nuclei. Annual Review of Nuclear and Particle Science, 53(1):219–261, 2003. doi: 10.1146/annurev.nucl.53.041002.110406. URL https://doi.org/10.1146/ annurev.nucl.53.041002.110406

    2003

  12. [18]

    Aumann, C

    T. Aumann, C. A. Bertulani, and J. Ryckebusch. Quasifree ( p,2p) and ( p,pn) reactions with unstable nuclei. Phys. Rev. C , 88:064610, Dec 2013. doi: 10.1103/PhysRevC.88.064610. URL https://link.aps.org/doi/10. 1103/PhysRevC.88.064610

    2013 doi

  13. [19]

    Obertelli, A

    A. Obertelli, A. Delbart, S. Anvar, L. Audirac, G. Authelet, H. Baba, B. Bruyneel, D. Calvet, F. Chˆ ateau, A. Corsi, P. Doornenbal, J.-M. Gheller, A. Giganon, C. Lahonde-Hamdoun, D. Leboeuf, D. Loiseau, A. Mohamed, J.-Ph. Mols, H. Otsu, C. P´ eron, A. Peyaud, E.C. Pollacco, G...

    2014 doi

  14. [20]

    Boretzky, G

    K. Boretzky, G. D. Alkazov, L. Atar, T. Aumann, C. Beinrucker, D. Bemmerer, D. Bertini, A. Blanco, C. Caesar, T. E. Cowan, G. Dentinger, Z. Elekes, A. Endres, P. Fonte, D. Galaviz, I. Gasparic, S. Gohl, V. L. Golovtsov, T. Heftrich, M. Heil, M. Heine, A. Heinz, M. Holl, A. Hor...

    2014

  15. [21]

    Boretzky, I

    K. Boretzky, I. Gaˇ spari´ c, M. Heil, J. Mayer, A. Heinz, C. Caesar, D. Kresan, H. Simon, H.T. T¨ ornqvist, D. K¨ orper, G. Alkhazov, L. Atar, T. Aumann, D. Bemmerer, S.V. Bondarev, L.T. Bott, S. Chakraborty, M.I. Cherciu, L.V. Chulkov, M. Ciobanu, U. Datta, E. De Filippo, C....

    2021

  16. [22]

    Nakamura and Y

    T. Nakamura and Y. Kondo. Large acceptance spectrometers for invariant mass spectroscopy of exotic nuclei and future developments. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 376:156–161, 2016. ISSN 0168-583X. doi...

    2016 doi

  17. [23]

    Christian, N

    G. Christian, N. Frank, S. Ash, T. Baumann, D. Bazin, J. Brown, P. A. DeYoung, J. E. Finck, A. Gade, G. F. Grinyer, A. Grovom, J. D. Hinnefeld, E. M. Lunderberg, B. Luther, M. Mosby, S. Mosby, T. Nagi, G. F. Peaslee, W. F. Rogers, J. K. Smith, J. Snyder, A. Spyrou, M. J. Stron...

    2012 doi

  18. [24]

    Takeuchi, T

    S. Takeuchi, T. Motobayashi, Y. Togano, M. Matsushita, N. Aoi, K. Demichi, H. Hasegawa, and H. Murakami. DALI2: A NaI(Tl) detector array for measurements ofγ rays from fast nuclei. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Dete...

  19. [25]

    Kondo, T

    Y. Kondo, T. Tomai, and T. Nakamura. Recent progress and developments for experimental studies with the samurai spectrometer. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 463:173–178, 2020. ISSN 0168-583X. doi: htt...

    2020 doi

  20. [26]

    J. Kahlbow. The low- Z shore of the island of inversion . Phd thesis, Technische Universit¨ at Darmstadt, Darmstadt, June 2019. https://tuprints.ulb.tu-darmstadt.de/id/eprint/9192

    2019

  21. [27]

    T. Kubo, K. Kusaka, K. Yoshida, A. Yoshida, T. Ohnishi, M. Ohtake, Y. Yanagisawa, N. Fukuda, T. Haseyama, Y. Yano, N. Kakutani, T. Tsuchihashi, and K. Sato. Status and overview of superconducting radioactive isotope beam separator BigRIPS at RIKEN. IEEE Transactions on Applied...

    2007

  22. [28]

    D.S. Ahn, N. Fukuda, H. Geissel, N. Inabe, N. Iwasa, T. Kubo, K. Kusaka, D. J. Morrissey, D. Murai, T. Naka- mura, M. Ohtake, H. Otsu, H. Sato, B. M. Sherrill, Y. Shimizu, H. Suzuki, H. Takeda, O. B. Tarasov, H. Ueno, Y. Yanagisawa, and K. Yoshida. Location of the neutron drip...

    2019 doi

  23. [29]

    D. S. Ahn, J. Amano, H. Baba, N. Fukuda, H. Geissel, N. Inabe, S. Ishikawa, N. Iwasa, T. Komatsubara, T. Kubo, K. Kusaka, D. J. Morrissey, T. Nakamura, M. Ohtake, H. Otsu, T. Sakakibara, H. Sato, B. M. Sherrill, Y. Shimizu, T. Sumikama, H. Suzuki, H. Takeda, O. B. Tarasov, H. ...

    2022 doi

  24. [30]

    Sakurai, S.M

    H. Sakurai, S.M. Lukyanov, M. Notani, N. Aoi, D. Beaumel, N. Fukuda, M. Hirai, E. Ideguchi, N. Imai, M. Ishihara, H. Iwasaki, T. Kubo, K. Kusaka, H. Kumagai, T. Nakamura, H. Ogawa, Yu.E. Penionzhke- vich, T. Teranishi, Y.X. Watanabe, K. Yoneda, and A. Yoshida. Evidence for par...

    1999 doi

  25. [31]

    island of inversion

    P. Doornenbal, H. Scheit, S. Takeuchi, Y. Utsuno, N. Aoi, K. Li, M. Matsushita, D. Steppenbeck, H. Wang, H. Baba, E. Ideguchi, N. Kobayashi, Y. Kondo, J. Lee, S. Michimasa, T. Motobayashi, T. Otsuka, H. Sakurai, M. Takechi, Y. Togano, and K. Yoneda. Low- Z shore of the “island...

    2017 doi

  26. [32]

    Gaudefroy, W

    L. Gaudefroy, W. Mittig, N.A. Orr, S. Varet, M. Chartier, P. Roussel-Chomaz, J. P. Ebran, B. Fern´ andez- Dom ´ ınguez, G. Fr´ emont, P. Gangnant, A. Gillibert, S. Gr´ evy, J.F. Libin, V.A. Maslov, S. Paschalis, B. Pietras, Yu.-E. Penionzhkevich, C. Spitaels, and A.C.C. Villar...

    2012 doi

  27. [33]

    Bagchi, R

    S. Bagchi, R. Kanungo, Y. K. Tanaka, H. Geissel, P. Doornenbal, W. Horiuchi, G. Hagen, T. Suzuki, N. Tsunoda, D. S. Ahn, H. Baba, K. Behr, F. Browne, S. Chen, M. L. Cort´ es, A. Estrad´ e, N. Fukuda, M. Holl, K. Itahashi, N. Iwasa, G. R. Jansen, W. G. Jiang, S. Kaur, A. O. Mac...

    2020

  28. [34]

    Elekes, Zs

    Z. Elekes, Zs. Dombr´ adi, A. Saito, N. Aoi, H. Baba, K. Demichi, Zs. F¨ ul¨ op, J. Gibelin, T. Gomi, H. Hasegawa, N. Imai, M. Ishihara, H. Iwasaki, S. Kanno, S. Kawai, T. Kishida, T. Kubo, K. Kurita, Y. Matsuyama, S. Michimasa, T. Minemura, T. Motobayashi, M. Notani, T. Ohnis...

    2004

  29. [35]

    Vandebrouck, A

    M. Vandebrouck, A. Lepailleur, O. Sorlin, T. Aumann, C. Caesar, M. Holl, V. Panin, F. Wamers, S. R. Stroberg, J. D. Holt, F. de Oliveira Santos, H. Alvarez-Pol, L. Atar, V. Avdeichikov, S. Beceiro-Novo, D. Bemmerer, J. Benlliure, C. A. Bertulani, S. K. Bogner, J. M. Boillos, K...

    2017

  30. [36]

    Lombardo and H.-J

    U. Lombardo and H.-J. Schulze. Superfluidity in neutron star matter, 2000

    2000

  31. [37]

    Holt, Achim Schwenk, and Yoshinori Akaishi

    Takaharu Otsuka, Toshio Suzuki, Jason D. Holt, Achim Schwenk, and Yoshinori Akaishi. Three-body forces and the limit of oxygen isotopes. Phys. Rev. Lett., 105:032501, Jul 2010. doi: 10.1103/PhysRevLett.105.032501. URL https://link.aps.org/doi/10.1103/PhysRevLett.105.032501

    2010 doi

  32. [38]

    Kondo, T

    Y. Kondo, T. Nakamura, R. Tanaka, R. Minakata, S. Ogoshi, N. A. Orr, N. L. Achouri, T. Aumann, H. Baba, F. Delaunay, P. Doornenbal, N. Fukuda, J. Gibelin, J. W. Hwang, N. Inabe, T. Isobe, D. Kameda, D. Kanno, S. Kim, N. Kobayashi, T. Kobayashi, T. Kubo, S. Leblond, J. Lee, F. ...

    2016

  33. [39]

    Li, B.-S

    J.-G. Li, B.-S. Hu, S. Zhang, and F.-R. Xu. Unbound 28O, the heaviest oxygen isotope observed: a cutting-edge probe for testing nuclear models. Nuclear Science and Technology , 35, Feb 2024. doi: 10.1007/s41365-024-01373-w. URL https://doi.org/10.1007/s41365-024-01373-w

    2024 doi

  34. [40]

    H. Hergert. A guided tour of ab initio nuclear many-body theory. Frontiers in Physics, 8, 2020. ISSN 2296-424X. doi: 10.3389/fphy.2020.00379. URL https://www.frontiersin.org/articles/10.3389/fphy.2020.00379

    2020

  35. [41]

    S. R. Stroberg, J. D. Holt, A. Schwenk, and J. Simonis. Ab initio limits of atomic nuclei. Phys. Rev. Lett. , 126:022501, Jan 2021. doi: 10.1103/PhysRevLett.126.022501. URL https://link.aps.org/doi/10.1103/ PhysRevLett.126.022501

    2021 doi

  36. [42]

    S. R. Stroberg, H. Hergert, J. D. Holt, S. K. Bogner, and A. Schwenk. Ground and excited states of doubly open-shell nuclei from ab initio valence-space hamiltonians. Phys. Rev. C , 93:051301, May 2016. doi: 10.1103/ PhysRevC.93.051301. URL https://link.aps.org/doi/10.1103/Phy...

    2016 doi

  37. [43]

    B.S. Hu, Q. Wu, J.G. Li, Y.Z. Ma, Z.H. Sun, N. Michel, and F.R. Xu. An ab-initio Gamow shell model approach with a core. Physics Letters B , 802:135206, 2020. ISSN 0370-2693. doi: https://doi.org/10.1016/j.physletb. 2020.135206. URL https://www.sciencedirect.com/science/articl...

    2020

  38. [44]

    Fossez and J

    K. Fossez and J. Rotureau. Density matrix renormalization group description of the island of inversion isotopes 28–33F. Phys. Rev. C , 106:034312, Sep 2022. doi: 10.1103/PhysRevC.106.034312. URL https://link.aps. org/doi/10.1103/PhysRevC.106.034312

    2022 doi

  39. [47]

    Tsunoda, T

    N. Tsunoda, T. Otsuka, K. Takayanagi, N. Shimizu, T. Suzuki, Y. Utsuno, S. Yoshida, and H. Ueno. The impact of nuclear shape on the emergence of the neutron dripline. Nature, 587:66–71, Nov 2020. doi: 10.1038/ s41586-020-2848-x. URL https://doi.org/10.1038/s41586-020-2848-x

    2020 doi

  40. [48]

    Miyagi, S

    T. Miyagi, S. R. Stroberg, J. D. Holt, and N. Shimizu. Ab initio multishell valence-space hamiltonians and the island of inversion. Phys. Rev. C , 102:034320, Sep 2020. doi: 10.1103/PhysRevC.102.034320. URL https: //link.aps.org/doi/10.1103/PhysRevC.102.034320

    2020 doi

  41. [49]

    Z. H. Sun, A. Ekstr¨ om, C. Forss´ en, G. Hagen, G. R. Jansen, and T. Papenbrock. Multiscale physics of atomic nuclei from first principles, 2024. URL https://arxiv.org/abs/2404.00058

    2024 arXiv

  42. [50]

    Hagen, G

    Andreas Ekstr¨ om, Christian Forss´ en, G. Hagen, G. R. Jansen, T. Papenbrock, and Z. H. Sun. How chiral forces shape neutron-rich Ne and Mg nuclei, 2023. URL https://arxiv.org/abs/2305.06955

    2023 arXiv

  43. [51]

    S. J. Novario, G. Hagen, G. R. Jansen, and T. Papenbrock. Charge radii of exotic neon and magnesium isotopes. Phys. Rev. C , 102:051303, Nov 2020. doi: 10.1103/PhysRevC.102.051303. URL https://link.aps.org/doi/ 10.1103/PhysRevC.102.051303

    2020 doi

  44. [52]

    Hagen, S

    G. Hagen, S. J. Novario, Z. H. Sun, T. Papenbrock, G. R. Jansen, J. G. Lietz, T. Duguet, and A. Tichai. Angular-momentum projection in coupled-cluster theory: Structure of 34Mg. Phys. Rev. C , 105:064311, Jun

  45. [53]

    Fortunato, J

    L. Fortunato, J. Casal, W. Horiuchi, J. Singh, and A. Vitturi. The 29F nucleus as a lighthouse on the coast of the island of inversion. Communications Physics, 3:132, July 2020. doi: 10.1038/s42005-020-00402-5. URL https://doi.org/10.1038/s42005-020-00402-5 . 25

    2020 doi

  46. [1966]

    URL https://link.aps.org/doi/10.1103/RevModPhys.38.121

    doi: 10.1103/RevModPhys.38.121. URL https://link.aps.org/doi/10.1103/RevModPhys.38.121

    doi

  47. [2014]

    doi: https://doi.org/10.1016/j.nima.2014.06.087

    ISSN 0168-9002. doi: https://doi.org/10.1016/j.nima.2014.06.087. URL http://www.sciencedirect. 22 com/science/article/pii/S0168900214008419

    2014 doi

  48. [2020]

    URL https://link.aps.org/doi/10.1103/PhysRevC.101.031301

    doi: 10.1103/PhysRevC.101.031301. URL https://link.aps.org/doi/10.1103/PhysRevC.101.031301

    doi

  49. [2022]

    URL https://link.aps.org/doi/10.1103/PhysRevC.105.064311

    doi: 10.1103/PhysRevC.105.064311. URL https://link.aps.org/doi/10.1103/PhysRevC.105.064311. 24

    doi

  50. [2693]

    URL https://www.sciencedirect.com/science/ article/pii/S0370269323003726

    doi: https://doi.org/10.1016/j.physletb.2023.138038. URL https://www.sciencedirect.com/science/ article/pii/S0370269323003726

    2023

Pith tools

Reviewed August 11, 2026 · model on record in the stance chip above.