Halo Structure of the Neutron-Dripline Nucleus B 19

K. J. Cook; T. Nakamura; Y. Kondo; K. Hagino; K. Ogata; A. T. Saito; N. L. Achouri; T. Aumann; H. Baba; F. Delaunay; Q. Deshayes; 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. M. Marqués; R. Minakata; T. Motobayashi; K. Muto; T. Murakami; D. Murai; T. Nakashima; N. Nakatsuka; A. Navin; S. Nishi; S. Ogoshi; N. A. Orr; H. Otsu; H. Sato; Y. Satou; Y. Shimizu; H. Suzuki; K. Takahashi; H. Takeda; S. Takeuchi; R. Tanaka; Y. Togano; J. Tsubota; A. G. Tuff; M. Vandebrouck; K. Yoneda

doi:10.1103/PhysRevLett.124.212503

Halo Structure of the Neutron-Dripline Nucleus B 19

K. J. Cook^*, T. Nakamura, Y. Kondo, K. Hagino, K. Ogata, A. T. Saito, N. L. Achouri, T. Aumann, H. Baba, F. Delaunay, Q. Deshayes, P. Doornenbal, N. Fukuda, J. Gibelin, J. W. Hwang, N. Inabe, T. Isobe, D. Kameda, D. Kanno, S. KimN. Kobayashi, T. Kobayashi, T. Kubo, S. Leblond, J. Lee, F. M. Marqués, R. Minakata, T. Motobayashi, K. Muto, T. Murakami, D. Murai, T. Nakashima, N. Nakatsuka, A. Navin, S. Nishi, S. Ogoshi, N. A. Orr, H. Otsu, H. Sato, Y. Satou, Y. Shimizu, H. Suzuki, K. Takahashi, H. Takeda, S. Takeuchi, R. Tanaka, Y. Togano, J. Tsubota, A. G. Tuff, M. Vandebrouck, K. Yoneda

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

The heaviest bound isotope of boron B19 has been investigated using exclusive measurements of its Coulomb dissociation, into B17 and two neutrons, in collisions with Pb at 220 MeV/nucleon. Enhanced electric dipole (E1) strength is observed just above the two-neutron decay threshold with an integrated E1 strength of B(E1)=1.64±0.06(stat)±0.12(sys) e2 fm2 for relative energies below 6 MeV. This feature, known as a soft E1 excitation, provides the first firm evidence that B19 has a prominent two-neutron halo. Three-body calculations that reproduce the energy spectrum indicate that the valence neutrons have a significant s-wave configuration and exhibit a dineutronlike correlation.

Original language	English
Article number	212503
Journal	Physical Review Letters
Volume	124
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.124.212503
Publication status	Published - 29 May 2020
Externally published	Yes

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Cook, K. J., Nakamura, T., Kondo, Y., Hagino, K., Ogata, K., Saito, A. T., Achouri, N. L., Aumann, T., Baba, H., Delaunay, F., Deshayes, Q., Doornenbal, P., Fukuda, N., Gibelin, J., Hwang, J. W., Inabe, N., Isobe, T., Kameda, D., Kanno, D., ... Yoneda, K. (2020). Halo Structure of the Neutron-Dripline Nucleus B 19. Physical Review Letters, 124(21), Article 212503. https://doi.org/10.1103/PhysRevLett.124.212503

@article{ad0c3aaa0ca94ccd9d862ad12f931792,

title = "Halo Structure of the Neutron-Dripline Nucleus B 19",

abstract = "The heaviest bound isotope of boron B19 has been investigated using exclusive measurements of its Coulomb dissociation, into B17 and two neutrons, in collisions with Pb at 220 MeV/nucleon. Enhanced electric dipole (E1) strength is observed just above the two-neutron decay threshold with an integrated E1 strength of B(E1)=1.64±0.06(stat)±0.12(sys) e2 fm2 for relative energies below 6 MeV. This feature, known as a soft E1 excitation, provides the first firm evidence that B19 has a prominent two-neutron halo. Three-body calculations that reproduce the energy spectrum indicate that the valence neutrons have a significant s-wave configuration and exhibit a dineutronlike correlation.",

author = "Cook, {K. J.} and T. Nakamura and Y. Kondo and K. Hagino and K. Ogata and Saito, {A. T.} and Achouri, {N. L.} and T. Aumann and H. Baba and F. Delaunay and Q. Deshayes and P. Doornenbal and N. Fukuda and J. Gibelin and Hwang, {J. W.} and N. Inabe and T. Isobe and D. Kameda and D. Kanno and S. Kim and N. Kobayashi and T. Kobayashi and T. Kubo and S. Leblond and J. Lee and Marqu{\'e}s, {F. M.} and R. Minakata and T. Motobayashi and K. Muto and T. Murakami and D. Murai and T. Nakashima and N. Nakatsuka and A. Navin and S. Nishi and S. Ogoshi and Orr, {N. A.} and H. Otsu and H. Sato and Y. Satou and Y. Shimizu and H. Suzuki and K. Takahashi and H. Takeda and S. Takeuchi and R. Tanaka and Y. Togano and J. Tsubota and Tuff, {A. G.} and M. Vandebrouck and K. Yoneda",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society..",

year = "2020",

month = may,

day = "29",

doi = "10.1103/PhysRevLett.124.212503",

language = "English",

volume = "124",

journal = "Physical Review Letters",

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Cook, KJ, Nakamura, T, Kondo, Y, Hagino, K, Ogata, K, Saito, AT, Achouri, NL, Aumann, T, Baba, H, Delaunay, F, Deshayes, Q, Doornenbal, P, Fukuda, N, Gibelin, J, Hwang, JW, Inabe, N, Isobe, T, Kameda, D, Kanno, D, Kim, S, Kobayashi, N, Kobayashi, T, Kubo, T, Leblond, S, Lee, J, Marqués, FM, Minakata, R, Motobayashi, T, Muto, K, Murakami, T, Murai, D, Nakashima, T, Nakatsuka, N, Navin, A, Nishi, S, Ogoshi, S, Orr, NA, Otsu, H, Sato, H, Satou, Y, Shimizu, Y, Suzuki, H, Takahashi, K, Takeda, H, Takeuchi, S, Tanaka, R, Togano, Y, Tsubota, J, Tuff, AG, Vandebrouck, M & Yoneda, K 2020, 'Halo Structure of the Neutron-Dripline Nucleus B 19', Physical Review Letters, vol. 124, no. 21, 212503. https://doi.org/10.1103/PhysRevLett.124.212503

TY - JOUR

T1 - Halo Structure of the Neutron-Dripline Nucleus B 19

AU - Cook, K. J.

AU - Nakamura, T.

AU - Kondo, Y.

AU - Hagino, K.

AU - Ogata, K.

AU - Saito, A. T.

AU - Achouri, N. L.

AU - Aumann, T.

AU - Baba, H.

AU - Delaunay, F.

AU - Deshayes, Q.

AU - Doornenbal, P.

AU - Fukuda, N.

AU - Gibelin, J.

AU - Hwang, J. W.

AU - Inabe, N.

AU - Isobe, T.

AU - Kameda, D.

AU - Kanno, D.

AU - Kim, S.

AU - Kobayashi, N.

AU - Kobayashi, T.

AU - Kubo, T.

AU - Leblond, S.

AU - Lee, J.

AU - Marqués, F. M.

AU - Minakata, R.

AU - Motobayashi, T.

AU - Muto, K.

AU - Murakami, T.

AU - Murai, D.

AU - Nakashima, T.

AU - Nakatsuka, N.

AU - Navin, A.

AU - Nishi, S.

AU - Ogoshi, S.

AU - Orr, N. A.

AU - Otsu, H.

AU - Sato, H.

AU - Satou, Y.

AU - Shimizu, Y.

AU - Suzuki, H.

AU - Takahashi, K.

AU - Takeda, H.

AU - Takeuchi, S.

AU - Tanaka, R.

AU - Togano, Y.

AU - Tsubota, J.

AU - Tuff, A. G.

AU - Vandebrouck, M.

AU - Yoneda, K.

PY - 2020/5/29

Y1 - 2020/5/29

N2 - The heaviest bound isotope of boron B19 has been investigated using exclusive measurements of its Coulomb dissociation, into B17 and two neutrons, in collisions with Pb at 220 MeV/nucleon. Enhanced electric dipole (E1) strength is observed just above the two-neutron decay threshold with an integrated E1 strength of B(E1)=1.64±0.06(stat)±0.12(sys) e2 fm2 for relative energies below 6 MeV. This feature, known as a soft E1 excitation, provides the first firm evidence that B19 has a prominent two-neutron halo. Three-body calculations that reproduce the energy spectrum indicate that the valence neutrons have a significant s-wave configuration and exhibit a dineutronlike correlation.

AB - The heaviest bound isotope of boron B19 has been investigated using exclusive measurements of its Coulomb dissociation, into B17 and two neutrons, in collisions with Pb at 220 MeV/nucleon. Enhanced electric dipole (E1) strength is observed just above the two-neutron decay threshold with an integrated E1 strength of B(E1)=1.64±0.06(stat)±0.12(sys) e2 fm2 for relative energies below 6 MeV. This feature, known as a soft E1 excitation, provides the first firm evidence that B19 has a prominent two-neutron halo. Three-body calculations that reproduce the energy spectrum indicate that the valence neutrons have a significant s-wave configuration and exhibit a dineutronlike correlation.

UR - http://www.scopus.com/inward/record.url?scp=85085972492&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.124.212503

DO - 10.1103/PhysRevLett.124.212503

M3 - Article

SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 212503

ER -

Halo Structure of the Neutron-Dripline Nucleus B 19

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