Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B 17

Z. H. Yang; Y. Kubota; A. Corsi; K. Yoshida; X. X. Sun; J. G. Li; M. Kimura; N. Michel; K. Ogata; C. X. Yuan; Q. Yuan; G. Authelet; H. Baba; C. Caesar; D. Calvet; A. Delbart; M. Dozono; J. Feng; F. Flavigny; J. M. Gheller; J. Gibelin; A. Giganon; A. Gillibert; K. Hasegawa; T. Isobe; Y. Kanaya; S. Kawakami; D. Kim; Y. Kiyokawa; M. Kobayashi; N. Kobayashi; T. Kobayashi; Y. Kondo; Z. Korkulu; S. Koyama; V. Lapoux; Y. Maeda; F. M. Marqués; T. Motobayashi; T. Miyazaki; T. Nakamura; N. Nakatsuka; Y. Nishio; A. Obertelli; A. Ohkura; N. A. Orr; S. Ota; H. Otsu; T. Ozaki; V. Panin; S. Paschalis; E. C. Pollacco; S. Reichert; J. Y. Roussé; A. T. Saito; S. Sakaguchi; M. Sako; C. Santamaria; M. Sasano; H. Sato; M. Shikata; Y. Shimizu; Y. Shindo; L. Stuhl; T. Sumikama; Y. L. Sun; M. Tabata; Y. Togano; J. Tsubota; F. R. Xu; J. Yasuda; K. Yoneda; J. Zenihiro; S. G. Zhou; W. Zuo; T. Uesaka

doi:10.1103/PhysRevLett.126.082501

Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B 17

Z. H. Yang, Y. Kubota, A. Corsi, K. Yoshida, X. X. Sun, J. G. Li, M. Kimura, N. Michel, K. Ogata, C. X. Yuan, Q. Yuan, G. Authelet, H. Baba, C. Caesar, D. Calvet, A. Delbart, M. Dozono, J. Feng, F. Flavigny, J. M. GhellerJ. Gibelin, A. Giganon, A. Gillibert, K. Hasegawa, T. Isobe, Y. Kanaya, S. Kawakami, D. Kim, Y. Kiyokawa, M. Kobayashi, N. Kobayashi, T. Kobayashi, Y. Kondo, Z. Korkulu, S. Koyama, V. Lapoux, Y. Maeda, F. M. Marqués, T. Motobayashi, T. Miyazaki, T. Nakamura, N. Nakatsuka, Y. Nishio, A. Obertelli, A. Ohkura, N. A. Orr, S. Ota, H. Otsu, T. Ozaki, V. Panin, S. Paschalis, E. C. Pollacco, S. Reichert, J. Y. Roussé, A. T. Saito, S. Sakaguchi, M. Sako, C. Santamaria, M. Sasano, H. Sato, M. Shikata, Y. Shimizu, Y. Shindo, L. Stuhl, T. Sumikama, Y. L. Sun, M. Tabata, Y. Togano, J. Tsubota, F. R. Xu, J. Yasuda, K. Yoneda, J. Zenihiro, S. G. Zhou, W. Zuo, T. Uesaka

Experimental Particle Physics

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Abstract

A kinematically complete quasifree (p,pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus B17, which had long been considered to have a neutron halo. By analyzing the momentum distributions and exclusive cross sections, we obtained the spectroscopic factors for 1s1/2 and 0d5/2 orbitals, and a surprisingly small percentage of 9(2)% was determined for 1s1/2. Our finding of such a small 1s1/2 component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theory in continuum, revealing a definite but not dominant neutron halo in B17. The present work gives the smallest s- or p-orbital component among known nuclei exhibiting halo features and implies that the dominant occupation of s or p orbitals is not a prerequisite for the occurrence of a neutron halo.

Original language	English
Article number	082501
Journal	Physical review letters
Volume	126
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.126.082501
Publication status	Published - Feb 23 2021

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Physics and Astronomy(all)

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10.1103/PhysRevLett.126.082501

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Yang, Z. H., Kubota, Y., Corsi, A., Yoshida, K., Sun, X. X., Li, J. G., Kimura, M., Michel, N., Ogata, K., Yuan, C. X., Yuan, Q., Authelet, G., Baba, H., Caesar, C., Calvet, D., Delbart, A., Dozono, M., Feng, J., Flavigny, F., ... Uesaka, T. (2021). Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B 17. Physical review letters, 126(8), Article 082501. https://doi.org/10.1103/PhysRevLett.126.082501

Yang, ZH, Kubota, Y, Corsi, A, Yoshida, K, Sun, XX, Li, JG, Kimura, M, Michel, N, Ogata, K, Yuan, CX, Yuan, Q, Authelet, G, Baba, H, Caesar, C, Calvet, D, Delbart, A, Dozono, M, Feng, J, Flavigny, F, Gheller, JM, Gibelin, J, Giganon, A, Gillibert, A, Hasegawa, K, Isobe, T, Kanaya, Y, Kawakami, S, Kim, D, Kiyokawa, Y, Kobayashi, M, Kobayashi, N, Kobayashi, T, Kondo, Y, Korkulu, Z, Koyama, S, Lapoux, V, Maeda, Y, Marqués, FM, Motobayashi, T, Miyazaki, T, Nakamura, T, Nakatsuka, N, Nishio, Y, Obertelli, A, Ohkura, A, Orr, NA, Ota, S, Otsu, H, Ozaki, T, Panin, V, Paschalis, S, Pollacco, EC, Reichert, S, Roussé, JY, Saito, AT, Sakaguchi, S, Sako, M, Santamaria, C, Sasano, M, Sato, H, Shikata, M, Shimizu, Y, Shindo, Y, Stuhl, L, Sumikama, T, Sun, YL, Tabata, M, Togano, Y, Tsubota, J, Xu, FR, Yasuda, J, Yoneda, K, Zenihiro, J, Zhou, SG, Zuo, W & Uesaka, T 2021, 'Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B 17', Physical review letters, vol. 126, no. 8, 082501. https://doi.org/10.1103/PhysRevLett.126.082501

@article{b51fe9f26fcc4941a6384879c24524e0,

title = "Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B 17",

abstract = "A kinematically complete quasifree (p,pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus B17, which had long been considered to have a neutron halo. By analyzing the momentum distributions and exclusive cross sections, we obtained the spectroscopic factors for 1s1/2 and 0d5/2 orbitals, and a surprisingly small percentage of 9(2)% was determined for 1s1/2. Our finding of such a small 1s1/2 component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theory in continuum, revealing a definite but not dominant neutron halo in B17. The present work gives the smallest s- or p-orbital component among known nuclei exhibiting halo features and implies that the dominant occupation of s or p orbitals is not a prerequisite for the occurrence of a neutron halo.",

author = "Yang, {Z. H.} and Y. Kubota and A. Corsi and K. Yoshida and Sun, {X. X.} and Li, {J. G.} and M. Kimura and N. Michel and K. Ogata and Yuan, {C. X.} and Q. Yuan and G. Authelet and H. Baba and C. Caesar and D. Calvet and A. Delbart and M. Dozono and J. Feng and F. Flavigny and Gheller, {J. M.} and J. Gibelin and A. Giganon and A. Gillibert and K. Hasegawa and T. Isobe and Y. Kanaya and S. Kawakami and D. Kim and Y. Kiyokawa and M. Kobayashi and N. Kobayashi and T. Kobayashi and Y. Kondo and Z. Korkulu and S. Koyama and V. Lapoux and Y. Maeda and Marqu{\'e}s, {F. M.} and T. Motobayashi and T. Miyazaki and T. Nakamura and N. Nakatsuka and Y. Nishio and A. Obertelli and A. Ohkura and Orr, {N. A.} and S. Ota and H. Otsu and T. Ozaki and V. Panin and S. Paschalis and Pollacco, {E. C.} and S. Reichert and Rouss{\'e}, {J. Y.} and Saito, {A. T.} and S. Sakaguchi and M. Sako and C. Santamaria and M. Sasano and H. Sato and M. Shikata and Y. Shimizu and Y. Shindo and L. Stuhl and T. Sumikama and Sun, {Y. L.} and M. Tabata and Y. Togano and J. Tsubota and Xu, {F. R.} and J. Yasuda and K. Yoneda and J. Zenihiro and Zhou, {S. G.} and W. Zuo and T. Uesaka",

note = "Funding Information: We thank the accelerator staff of the RIKEN Nishina Center for the primary beam delivery and the BigRIPS team for their efforts in preparing the secondary beams. Z. H. Y. acknowledges fruitful discussions with C. L. Bai, J. Casal, Y. Sato, T. T. Sun, and S. M. Wang and the support from the Foreign Postdoctoral Researcher program of RIKEN. This work has been supported by the European Research Council through the ERC Grant No. MINOS-25856; the JSPS KAKENHI Grants No. JP16K05352, No. JP18H05404, and No. JP16H02179; the National Natural Science Foundation of China under Grants No. 11525524, No. 11835001, No. 11921006, No. 11975282, No. 11435014, No. 11775316, and No. 11961141004; the Strategic Priority Research Program of Chinese Academy of Sciences, Grant No. XDB34000000; the Institute for Basic Science (IBS-R031-D1); and the French ANR-14-CE33-0022-02 EXPAND. This work was supported by the JSPS A3 Foresight Program. The computation of this work was partly supported by the HPC Cluster of Institute of Theoretical Physics (ITP) of Chinese Academy of Sciences and the Supercomputing Center of Computer Network Information Center (CNIC) of Chinese Academy of Sciences. Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

month = feb,

day = "23",

doi = "10.1103/PhysRevLett.126.082501",

language = "English",

volume = "126",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "8",

}

TY - JOUR

T1 - Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B 17

AU - Yang, Z. H.

AU - Kubota, Y.

AU - Corsi, A.

AU - Yoshida, K.

AU - Sun, X. X.

AU - Li, J. G.

AU - Kimura, M.

AU - Michel, N.

AU - Ogata, K.

AU - Yuan, C. X.

AU - Yuan, Q.

AU - Authelet, G.

AU - Baba, H.

AU - Caesar, C.

AU - Calvet, D.

AU - Delbart, A.

AU - Dozono, M.

AU - Feng, J.

AU - Flavigny, F.

AU - Gheller, J. M.

AU - Gibelin, J.

AU - Giganon, A.

AU - Gillibert, A.

AU - Hasegawa, K.

AU - Isobe, T.

AU - Kanaya, Y.

AU - Kawakami, S.

AU - Kim, D.

AU - Kiyokawa, Y.

AU - Kobayashi, M.

AU - Kobayashi, N.

AU - Kobayashi, T.

AU - Kondo, Y.

AU - Korkulu, Z.

AU - Koyama, S.

AU - Lapoux, V.

AU - Maeda, Y.

AU - Marqués, F. M.

AU - Motobayashi, T.

AU - Miyazaki, T.

AU - Nakamura, T.

AU - Nakatsuka, N.

AU - Nishio, Y.

AU - Obertelli, A.

AU - Ohkura, A.

AU - Orr, N. A.

AU - Ota, S.

AU - Otsu, H.

AU - Ozaki, T.

AU - Panin, V.

AU - Paschalis, S.

AU - Pollacco, E. C.

AU - Reichert, S.

AU - Roussé, J. Y.

AU - Saito, A. T.

AU - Sakaguchi, S.

AU - Sako, M.

AU - Santamaria, C.

AU - Sasano, M.

AU - Sato, H.

AU - Shikata, M.

AU - Shimizu, Y.

AU - Shindo, Y.

AU - Stuhl, L.

AU - Sumikama, T.

AU - Sun, Y. L.

AU - Tabata, M.

AU - Togano, Y.

AU - Tsubota, J.

AU - Xu, F. R.

AU - Yasuda, J.

AU - Yoneda, K.

AU - Zenihiro, J.

AU - Zhou, S. G.

AU - Zuo, W.

AU - Uesaka, T.

N1 - Funding Information: We thank the accelerator staff of the RIKEN Nishina Center for the primary beam delivery and the BigRIPS team for their efforts in preparing the secondary beams. Z. H. Y. acknowledges fruitful discussions with C. L. Bai, J. Casal, Y. Sato, T. T. Sun, and S. M. Wang and the support from the Foreign Postdoctoral Researcher program of RIKEN. This work has been supported by the European Research Council through the ERC Grant No. MINOS-25856; the JSPS KAKENHI Grants No. JP16K05352, No. JP18H05404, and No. JP16H02179; the National Natural Science Foundation of China under Grants No. 11525524, No. 11835001, No. 11921006, No. 11975282, No. 11435014, No. 11775316, and No. 11961141004; the Strategic Priority Research Program of Chinese Academy of Sciences, Grant No. XDB34000000; the Institute for Basic Science (IBS-R031-D1); and the French ANR-14-CE33-0022-02 EXPAND. This work was supported by the JSPS A3 Foresight Program. The computation of this work was partly supported by the HPC Cluster of Institute of Theoretical Physics (ITP) of Chinese Academy of Sciences and the Supercomputing Center of Computer Network Information Center (CNIC) of Chinese Academy of Sciences. Publisher Copyright: © 2021 American Physical Society.

PY - 2021/2/23

Y1 - 2021/2/23

N2 - A kinematically complete quasifree (p,pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus B17, which had long been considered to have a neutron halo. By analyzing the momentum distributions and exclusive cross sections, we obtained the spectroscopic factors for 1s1/2 and 0d5/2 orbitals, and a surprisingly small percentage of 9(2)% was determined for 1s1/2. Our finding of such a small 1s1/2 component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theory in continuum, revealing a definite but not dominant neutron halo in B17. The present work gives the smallest s- or p-orbital component among known nuclei exhibiting halo features and implies that the dominant occupation of s or p orbitals is not a prerequisite for the occurrence of a neutron halo.

AB - A kinematically complete quasifree (p,pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus B17, which had long been considered to have a neutron halo. By analyzing the momentum distributions and exclusive cross sections, we obtained the spectroscopic factors for 1s1/2 and 0d5/2 orbitals, and a surprisingly small percentage of 9(2)% was determined for 1s1/2. Our finding of such a small 1s1/2 component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theory in continuum, revealing a definite but not dominant neutron halo in B17. The present work gives the smallest s- or p-orbital component among known nuclei exhibiting halo features and implies that the dominant occupation of s or p orbitals is not a prerequisite for the occurrence of a neutron halo.

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U2 - 10.1103/PhysRevLett.126.082501

DO - 10.1103/PhysRevLett.126.082501

M3 - Article

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AN - SCOPUS:85102399369

SN - 0031-9007

VL - 126

JO - Physical review letters

JF - Physical review letters

IS - 8

M1 - 082501

ER -

Quasifree Neutron Knockout Reaction Reveals a Small s -Orbital Component in the Borromean Nucleus B 17

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