Observation of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-Wave One-Neutron Halo Configuration in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Mg</mml:mi></mml:mrow><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>37</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>

Kobayashi, N.; Nakamura, Takashi; Kondo, Y.; Tostevin, J. A.; Utsuno, Yutaka; Aoi, N.; Baba, H.; Barthelemy, Ramón S.; Famiano, M.; Fukuda, N.; Inabe, N.; Ishihara, M.; Kanungo, R.; Kim, S; Kubo, T.; Lee, G. S; Lee, H. S; Matsushita, M.; Motobayashi, T.; Ohnishi, T.; Orr, N. A.; Otsu, H.; Otsuka, T.; Sako, Takeshi; Sakuraï, H.; Satou, Y.; Sumikama, T.; Takeda, Hiroyuki; Takeuchi, Satoshi; Tanaka, R.; Togano, Y.; Yoneda, K.

doi:10.1103/physrevlett.112.242501

Cited by 120 publications

(43 citation statements)

References 31 publications

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“…Such a behavior is reminiscent of deformed halo systems [27] whose asymptotic behavior is governed by low-partial waves. Since the neutron-bound 37 Mg is expected to be a oneneutron halo [25,26] due to its appreciable p-wave neutron single-particle strength, a low-lying J π = 7 2 − resonance in 39 Mg can be considered as its structural unbound analog. Our RGM calculations for 37 Mg support the halo character of this nucleus, with the two weaklybound J π = 5 2 − and 7 2 − states being the candidates for the ground state, and an excited 3 2 − state around the threshold.…”

Section: B Lifetimesmentioning

confidence: 99%

Single-particle and collective motion in unbound deformed Mg39

et al. 2016

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Background: Deformed neutron-rich magnesium isotopes constitute a fascinating territory where the interplay between collective rotation and single-particle motion is strongly affected by the neutron continuum. The unbound f p-shell nucleus 39 Mg is an ideal candidate to study this interplay.Purpose: In this work, we predict the properties of low-lying resonant states of 39 Mg, using a suite of realistic theoretical approaches rooted in the open quantum system framework. − ground-state candidate exhibits a resonant structure reminiscent of that of its one-neutron halo neighbor 37 Mg, which is dominated by the f 7 2 partial wave at short distances and a p 3 2 component at large distances. A J Conclusion:We demonstrate that the subtle interplay between deformation, shell structure, and continuum coupling can result in a variety of excitations in an unbound nucleus just outside the neutron drip line.

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Section: B Lifetimesmentioning

confidence: 99%

Single-particle and collective motion in unbound deformed Mg39

et al. 2016

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“…Recently, the single-particle resonances in deformed nuclei have received considerable attention as structures of exotic nuclei. For example, the halo in 31 Ne can be well interpreted in terms of deformation with particles populating the resonant levels [12,34,35], and an experiment on oneneutron-removal reactions from the neutron-rich nucleus 37 Mg supports a picture in which 37 Mg is deformed and has a significant p-wave neutron halo component [7]. The deformed halos have been investigated theoretically in Ref.…”

Section: Introductionmentioning

confidence: 96%

“…The early works mainly focus on the light exotic nuclei. Recent experiments reveal the existence of exotic phenomena in some heavier nuclei such as 31 Ne [5,6] and 37 Mg [7], which has aroused increasing interest in the study of exotic nuclei. In these exotic nuclei, the Fermi surface is usually close to the particle continuum, and the contribution of the continuum and/or resonances is essential for exotic nuclear phenomena [8,9].…”

Section: Introductionmentioning

confidence: 99%

Relativistic extension of the complex scaling method for resonant states in deformed nuclei

et al. 2014

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The complex scaling method is extended to the relativistic framework for describing deformed nuclei and the theoretical formalism is presented in detail. How to expose the resonant states is demonstrated, and the applicability and efficiency of the extended method are confirmed. The energies and widths of the single-particle resonant states in nuclei with A = 31 are determined, and the structure of single-particle levels for bound and resonant states is shown to be similar to that in the nonrelativistic calculations. Especially, the present formalism has yielded richer numerical results for the resonant levels than those obtained by the coupled-channel method in relativistic and nonrelativistic calculations.

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“…The neighboring odd-A 39 Mg was confirmed as unbound, indicating the ubiquitous role of pairing correlations. The lighter odd-A 37 Mg is very weakly bound and has been observed to have a neutron (2p 3/2 ) halo component in its ground state [14,15].…”

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confidence: 99%

First Spectroscopy of the Near Drip-line Nucleus Mg40

Crawford¹,

Fallon²,

Macchiavelli³

et al. 2019

Phys. Rev. Lett.

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One of the most exotic light neutron-rich nuclei currently accessible for experimental study is 40 Mg, which lies at the intersection of the nucleon magic number N =28 and the neutron drip-line. Low-lying excited states of 40 Mg have been studied for the first time following a one-proton removal reaction from 41 Al, performed at RIBF RIKEN with the DALI2 γ-ray array and the Zero-Degree spectrometer. Two γ-ray transitions were observed, suggesting an excitation spectrum which shows unexpected properties compared to both the systematics along the Z=12, N ≥20 Mg isotopes and available state-of-the-art theoretical model predictions. A possible explanation for the observed structure involves weak-binding effects in the low-lying excitation spectrum.

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Observation of ap-Wave One-Neutron Halo Configuration inMg37

Cited by 120 publications

References 31 publications

Single-particle and collective motion in unbound deformed Mg39

Single-particle and collective motion in unbound deformed Mg39

Relativistic extension of the complex scaling method for resonant states in deformed nuclei

First Spectroscopy of the Near Drip-line Nucleus Mg40

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