Neutron correlations in the decay of the first excited state of 11Li

J. K. Smith; T. Baumann; D. Bazin; J. Brown; P. A. DeYoung; N. Frank; M. D. Jones; Z. Kohley; B. Luther; B. Marks; A. Spyrou; S. L. Stephenson; M. Thoennessen; A. Volya

doi:10.1016/j.nuclphysa.2016.05.023

Neutron correlations in the decay of the first excited state of ¹¹Li

J. K. Smith^*, T. Baumann, D. Bazin, J. Brown, P. A. DeYoung, N. Frank, M. D. Jones, Z. Kohley, B. Luther, B. Marks, A. Spyrou, S. L. Stephenson, M. Thoennessen, A. Volya

^*Corresponding author for this work

Physics and Astronomy

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

7 Scopus citations

Abstract

The decay of unbound excited ¹¹Li was measured after being populated by a two-proton removal from a ¹³B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the ⁹Li fragment and neutrons. A resonance at an excitation energy of ~1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded.

Original language	English (US)
Pages (from-to)	27-40
Number of pages	14
Journal	Nuclear Physics A
Volume	955
DOIs	https://doi.org/10.1016/j.nuclphysa.2016.05.023
State	Published - Nov 1 2016

Funding

The authors would like to thank Miguel Marqués for sharing the code for the phase space with FSI calculations with us. This work was funded by NSF grant Nos. PHY-096173 , PHY-1102511 , PHY-1205537 , and PHY-1306074 and DOE Grant No. DE-SC-0009883 . This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Grant No. DE-NA0000979 .

Keywords

Exotic nuclei
Halo nuclei
Neutron spectroscopy
Three-body correlations

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.nuclphysa.2016.05.023

Cite this

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title = "Neutron correlations in the decay of the first excited state of 11Li",

abstract = "The decay of unbound excited 11Li was measured after being populated by a two-proton removal from a 13B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the 9Li fragment and neutrons. A resonance at an excitation energy of ~1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded.",

keywords = "Exotic nuclei, Halo nuclei, Neutron spectroscopy, Three-body correlations",

author = "Smith, {J. K.} and T. Baumann and D. Bazin and J. Brown and DeYoung, {P. A.} and N. Frank and Jones, {M. D.} and Z. Kohley and B. Luther and B. Marks and A. Spyrou and Stephenson, {S. L.} and M. Thoennessen and A. Volya",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V..",

year = "2016",

month = nov,

day = "1",

doi = "10.1016/j.nuclphysa.2016.05.023",

language = "English (US)",

volume = "955",

pages = "27--40",

journal = "Nuclear Physics A",

issn = "0375-9474",

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TY - JOUR

T1 - Neutron correlations in the decay of the first excited state of 11Li

AU - Smith, J. K.

AU - Baumann, T.

AU - Bazin, D.

AU - Brown, J.

AU - DeYoung, P. A.

AU - Frank, N.

AU - Jones, M. D.

AU - Kohley, Z.

AU - Luther, B.

AU - Marks, B.

AU - Spyrou, A.

AU - Stephenson, S. L.

AU - Thoennessen, M.

AU - Volya, A.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The decay of unbound excited 11Li was measured after being populated by a two-proton removal from a 13B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the 9Li fragment and neutrons. A resonance at an excitation energy of ~1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded.

AB - The decay of unbound excited 11Li was measured after being populated by a two-proton removal from a 13B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the 9Li fragment and neutrons. A resonance at an excitation energy of ~1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded.

KW - Exotic nuclei

KW - Halo nuclei

KW - Neutron spectroscopy

KW - Three-body correlations

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VL - 955

SP - 27

EP - 40

JO - Nuclear Physics A

JF - Nuclear Physics A

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