Surface Localization of the Dineutron in 
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Kubota, Yuki; Corsi, A.; Authelet, G.; Baba, H.; Caesar, C.; Calvet, D.; Delbart, A.; Dozono, M.; Feng, Jinhui; Flavigny, F.; Gheller, J.-M.; Gibelin, J.; Giganon, A.; Gillibert, A.; Hasegawa, K.; Isobe, T.; Kanaya, Yoshio; Kawakami, Satoshi; Kim, D.; Kikuchi, Yoshihiro; Kiyokawa, Yasushi; Kobayashi, Mariko; Kobayashi, N.; Kobayashi, T.; Kondo, Y.; Korkulu, Z.; Koyama, S.; Lapoux, V.; Maeda, Y.; Marqués, F. M.; Motobayashi, T.; Miyazaki, Takamichi; Nakamura, Takashi; Nakatsuka, N.; Nishio, Y.; Obertelli, A.; Ogata, Kazuyuki; Ohkura, A.; Orr, N. A.; Ota, S.; Otsu, H.; Ozaki, T.; Panin, V.; Paschalis, S.; Pollacco, E. C.; Reichert, S.; Roussé, J.-Y.; Saito, A.; Sakaguchi, Satoshi; Šako, M.; Santamaria, C.; Sasano, M.; Sato, Hiromi; Shikata, M.; Shimizu, Y.; Shindo, Y.; Stuhl, L.; Sumikama, T.; Sun, Y.; Tabata, M.; Togano, Y.; Tsubota, J.; Yang, Z.; Yasuda, J.; Yoneda, K.; Zenihiro, J.; Uesaka, T.

doi:10.1103/physrevlett.125.252501

Cited by 49 publications

(40 citation statements)

References 53 publications

(71 reference statements)

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“…This configuration is shown in the model of Hagino et al [28] to exist mostly in the region of the nuclear surface, at least in the case of the similar Borromean nucleus 11 Li, and experimental verification of this surface localization has recently been forthcoming (Kubota et al). [29] The two coexisting "cigar" and "dineutron" configurations are closely related to the configurations with onefold and twofold symmetry that the above arguments implied cannot exist on their own, in a pure state. They can, apparently, coexist in a state with a geometry described on average by D 3 symmetry.…”

Section: The Symmetries Of Halo Nucleimentioning

confidence: 89%

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

2021

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The nuclear matter and charge radii of the helium isotopes (A=4,6,8) are calculated by quantitative geometrical thermodynamics (QGT) taking as input the symmetry of the alpha-particle, the very weak binding (and hence halo nature) of the heavier helium isotopes, and a characteristic length scale given by the proton size. The results follow by considering each isotope in its ground state, with QGT representing each system as a maximum entropy configuration that conforms to the Holographic Principle. This allows key geometric parameters to be determined from the number of degrees of freedom available. QGT treats 6 He as a 4 He core plus a concentric neutron shell comprising a holomorphic pair of neutrons, and the 8 He neutron halo is treated as a holomorphic pair of holomorphic pairs. Considering that the information content of each system allows a correlation angle of 2𝝅/3 between the holomorphic entities to be inferred, then the charge radii of the three isotopes can be calculated from the displacement of the 4 He core from the center of mass. The calculations for the charge and matter radii of 4,6,8 He agree closely with observed values. Similar QGT calculation of the sizes of the self-conjugate A=4n nuclei { 4 He, 8 Be, 12 C, 16 O, 20 Ne, 24 Mg, 28 Si, 32 S, 36 Ar, 40 Ca} also agree well with experiment. OverviewWe will show that the matter and charge radii of the helium isotopes can be calculated ab initio purely from the geometry of

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Section: The Symmetries Of Halo Nucleimentioning

confidence: 89%

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

2021

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“…In order to analyze the momentum distribution of the knocked-out neutron and extract the 0d 5/2 and 1s 1/2 spectroscopic factors in 17 B, we carried out the distortedwave impulse approximation (DWIA) calculation [79]. This model has recently been applied in several (p, pn) and (p, 2p) experiments [32,33,[80][81][82][83][84][85][86]. The singleparticle wave function and the nuclear density were obtained using the Bohr-Mottelson potential [87].…”

Section: Bmentioning

confidence: 99%

“…Meanwhile, it is also important to have comprehensive investigation of the structure of a variety of nuclei with both well-and less-developed halos, particularly using transfer or knockout reactions, to reach a detailed understanding of 2n halo [6][7][8][9]. Such measurements have so far only been made for light systems with a well-developed 2n halo, 6 He [24][25][26], 11 Li [27][28][29][30][31][32][33][34], 14 Be [34][35][36][37][38]. In all these cases, the valence neutrons dominantly occupy p and s orbitals.…”

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confidence: 99%

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Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B17

Yang¹,

Kubota²,

Corsi³

et al. 2021

Phys. Rev. Lett.

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“…New facets of the nuclear pairing show up as a spatially-correlated twoneutron in dilute and weak-binding systems [3][4][5][6][7][8][9][10]. The spatial localization of two neutrons has been confirmed experimentally [11,12]. Meanwhile, there has been an enduring discussion on another type of exotic unconventional pairing in nuclei: the 3 S 1 correlation of isoscalar (IS) proton-neutron (pn) pairs in N ∼ Z nuclei [13].…”

Section: Introductionmentioning

confidence: 99%

Spin-triplet proton-neutron pair in spin-dipole excitations

Yoshida,

Tanimura

2021

Preprint

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Background: Spin-triplet (S = 1) proton-neutron (pn) pairing in nuclei has been under debate. It is well known that the dynamical pairing affects the nuclear matrix element of the Gamow-Teller (GT) transition and the double beta decay.Purpose: We investigate the effect of the pn-pair interaction in the T = 0, S = 1 channel on the low-lying spin-dipole (SD) transition. We then aim at clarifying the distinction of the role in between the SD and GT transitions.Method: We perform a three-body model calculation for the transition 80 Ni → 80 Cu, where 78 Ni is taken as a core. The strength of the pair interaction is varied to see the effect on the SD transition-strength distribution. To fortify the finding obtained by the three-body model, we employ the nuclear energy-density functional method for the SD transitions in several nuclei, where one can expect a strong effect. Results:The effect of the S = 1 pn-pair interaction depends on the spatial overlap of the pn pair and the angular momentum of the valence nucleons; the higher the angular momentum of the orbitals, the more significant the effect. Conclusions:The dynamical S = 1 pairing is effective even for SD states although the spatial overlap of the pn pair can be smaller than GT states. The SD transition involving high-orbitals with the same principal quantum number is strongly affected by the dynamical S = 1 pairing.

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Surface Localization of the Dineutron in Li11

Cited by 49 publications

References 53 publications

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B17

Spin-triplet proton-neutron pair in spin-dipole excitations

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