Halo Structure of the Neutron-Dripline Nucleus ^{19}B.

Journal

Physical review letters

ISSN: 1079-7114

Titre abrégé: Phys Rev Lett

Pays: United States

ID NLM: 0401141

Informations de publication

Date de publication:
29 May 2020

Historique:

revised: 24 04 2020

received: 09 03 2020

accepted: 06 05 2020

entrez: 13 6 2020

pubmed: 13 6 2020

medline: 13 6 2020

Statut: ppublish

Résumé

The heaviest bound isotope of boron ^{19}B has been investigated using exclusive measurements of its Coulomb dissociation, into ^{17}B 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) e^{2} fm^{2} for relative energies below 6 MeV. This feature, known as a soft E1 excitation, provides the first firm evidence that ^{19}B 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.

Identifiants

DOI: 10.1103/PhysRevLett.124.212503 PMID: 32530691

pubmed: 32530691

doi: 10.1103/PhysRevLett.124.212503

doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

212503

Auteurs

K J Cook (KJ)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

T Nakamura (T)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

Y Kondo (Y)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

K Hagino (K)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

K Ogata (K)

Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan.

Department of Physics, Osaka City University, Osaka 558-8585, Japan.

A T Saito (AT)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

N L Achouri (NL)

LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, 14050 Caen Cedex, France.

T Aumann (T)

Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.

ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany.

H Baba (H)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

F Delaunay (F)

LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, 14050 Caen Cedex, France.

Q Deshayes (Q)

LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, 14050 Caen Cedex, France.

P Doornenbal (P)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

N Fukuda (N)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

J Gibelin (J)

LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, 14050 Caen Cedex, France.

J W Hwang (JW)

Department of Physics and Astronomy, Seoul National University, 599 Gwanak, Seoul 151-742, Republic of Korea.

N Inabe (N)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

T Isobe (T)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

D Kameda (D)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

D Kanno (D)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

S Kim (S)

Department of Physics and Astronomy, Seoul National University, 599 Gwanak, Seoul 151-742, Republic of Korea.

N Kobayashi (N)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

T Kobayashi (T)

Department of Physics, Tohoku University, Aramaki Aoba 6-3, Aoba, Sendai, Miyagi 980-8578, Japan.

T Kubo (T)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

S Leblond (S)

LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, 14050 Caen Cedex, France.

J Lee (J)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

F M Marqués (FM)

LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, 14050 Caen Cedex, France.

R Minakata (R)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

T Motobayashi (T)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

K Muto (K)

Department of Physics, Tohoku University, Aramaki Aoba 6-3, Aoba, Sendai, Miyagi 980-8578, Japan.

T Murakami (T)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

D Murai (D)

Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan.

T Nakashima (T)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

N Nakatsuka (N)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

A Navin (A)

GANIL, CEA/DRF-CNRS/IN2P3, 14076 Caen Cedex 05, France.

S Nishi (S)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

S Ogoshi (S)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

N A Orr (NA)

LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, 14050 Caen Cedex, France.

H Otsu (H)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

H Sato (H)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

Y Satou (Y)

Department of Physics and Astronomy, Seoul National University, 599 Gwanak, Seoul 151-742, Republic of Korea.

Y Shimizu (Y)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

H Suzuki (H)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

K Takahashi (K)

Department of Physics, Tohoku University, Aramaki Aoba 6-3, Aoba, Sendai, Miyagi 980-8578, Japan.

H Takeda (H)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

S Takeuchi (S)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

R Tanaka (R)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

Y Togano (Y)

ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany.

Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan.

J Tsubota (J)

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.

A G Tuff (AG)

Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom.

M Vandebrouck (M)

IPN Orsay, Université Paris Sud, IN2P3-CNRS, 91406 Orsay Cedex, France.

K Yoneda (K)

RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.

Classifications MeSH