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

Physical Review Letters
K J CookK Yoneda

Abstract

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.

References

Jul 1, 1993·Physical Review C: Nuclear Physics·D SackettD L Humphrey
Aug 1, 1995·Physical Review C: Nuclear Physics·Y Kanada-En'yo, H Horiuchi
Feb 8, 1993·Physical Review Letters·K IekiD L Humphrey
May 20, 1996·Physical Review Letters·J S Al-Khalili, J A Tostevin
Feb 15, 2001·Physical Review Letters·M LabicheL Stuttgé
Jul 5, 2002·Physical Review Letters·T SuzukiY Yamaguchi
Aug 16, 2006·Physical Review Letters·T NakamuraK Yoneda
Aug 7, 2007·Physical Review Letters·K HaginoP Schuck
Dec 12, 2012·Physical Review Letters·L GaudefroyA C C Villari
Mar 26, 2016·Physical Review Letters·Y KondoK Yoneda
Mar 30, 2017·Reports on Progress in Physics·Pascal Naidon, Shimpei Endo
Jan 13, 2019·Physical Review Letters·S LeblondK Yoneda
Dec 7, 2019·Physical Review Letters·D S AhnK Yoshida

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Citations

Jan 9, 2021·Physical Review Letters·Y KubotaT Uesaka

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