Ground-state properties of $^{5}\mathrm{H}$ from the $^{6}\mathrm{He}(d,^{3}\mathrm{He})^{5}\mathrm{H}$ reaction

Ground-state properties of ${}^{5}H$ from the ${}^{6}{He} (d, {}^{3}{He}) {}^{5}H$ reaction

A. H. Wuosmaa, S. Bedoor, K. W. Brown, W. W. Buhro, Z. Chajecki, R. J. Charity, W. G. Lynch, J. Manfredi, S. T. Marley, D. G. McNeel, A. S. Newton, D. V. Shetty, R. H. Showalter, L. G. Sobotka, M. B. Tsang, J. R. Winkelbauer, and R. B. Wiringa

Phys. Rev. C 95, 014310 – Published 11 January 2017

Abstract

We have studied the ground state of the unbound, very neutron-rich isotope of hydrogen ${}^{5}H$ , using the ${}^{6}{He} (d, {}^{3}{He}) {}^{5}H$ reaction in inverse kinematics at a bombarding energy of $E ({}^{6}{He}) = 55 A$ MeV. The present results suggest a ground-state resonance energy $E_{R} = 2.4 \pm 0.3$ MeV above the ${}^{3}H + 2 n$ threshold, with an intrinsic width of $Γ = 5.3 \pm 0.4$ MeV in the ${}^{5}H$ system. Both the resonance energy and width are higher than those reported in some, but not all previous studies of ${}^{5}H$ . The previously unreported ${}^{6}{He} (d, t) {}^{5}{He}_{g . s .}$ reaction is observed in the same measurement, providing a check on the understanding of the response of the apparatus. The data are compared to expectations from direct two-neutron and dineutron decay. The possibility of excited states of ${}^{5}H$ populated in this reaction is discussed using different calculations of the ${}^{6}{He} \to {}^{5}H + p$ spectroscopic overlaps from shell-model and ab initio nuclear-structure calculations.

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Received 3 October 2016

DOI:https://doi.org/10.1103/PhysRevC.95.014310

Physics Subject Headings (PhySH)

Binding energy & masses Lifetimes & widths Nuclear structure & decays Transfer reactions Unstable nuclei induced nuclear reactions

A ≤ 5

Nuclear Physics

Authors & Affiliations

A. H. Wuosmaa^1,2,*, S. Bedoor^1,2,†, K. W. Brown^3,‡, W. W. Buhro⁴, Z. Chajecki⁴, R. J. Charity³, W. G. Lynch⁴, J. Manfredi⁴, S. T. Marley^5,§, D. G. McNeel^1,2, A. S. Newton², D. V. Shetty⁶, R. H. Showalter⁴, L. G. Sobotka³, M. B. Tsang⁴, J. R. Winkelbauer^4,||, and R. B. Wiringa⁷

¹Department of Physics, University of Connecticut, Storrs, Connecticut 06268-3046, USA
²Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008-5252, USA
³Departments of Chemistry and Physics, Washington University at St. Louis, St. Louis, Missouri 63130, USA
⁴National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
⁵Department of Physics and Astronomy, University of Notre Dame, South Bend, Indiana 46558, USA
⁶Department of Physics, Grand Valley State University, Allendale, Michigan 49401, USA
⁷Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

^*Corresponding author: alan.wuosmaa@uconn.edu
^†Present address: Texas A & M University, College Station, TX 77843-4242.
^‡National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, E. Lansing MI, 48824, USA.
^§Louisiana State University, Baton Rouge, LA 70803-4001, USA.
^||Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

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Vol. 95, Iss. 1 — January 2017

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Physical Review C

covering nuclear physics

Ground-state properties of ${}^{5}H$ from the ${}^{6}{He} (d, {}^{3}{He}) {}^{5}H$ reaction

A. H. Wuosmaa, S. Bedoor, K. W. Brown, W. W. Buhro, Z. Chajecki, R. J. Charity, W. G. Lynch, J. Manfredi, S. T. Marley, D. G. McNeel, A. S. Newton, D. V. Shetty, R. H. Showalter, L. G. Sobotka, M. B. Tsang, J. R. Winkelbauer, and R. B. Wiringa

Phys. Rev. C 95, 014310 – Published 11 January 2017

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Physical Review C

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Ground-state properties of H5 from the He6(d,He3)H5 reaction

A. H. Wuosmaa, S. Bedoor, K. W. Brown, W. W. Buhro, Z. Chajecki, R. J. Charity, W. G. Lynch, J. Manfredi, S. T. Marley, D. G. McNeel, A. S. Newton, D. V. Shetty, R. H. Showalter, L. G. Sobotka, M. B. Tsang, J. R. Winkelbauer, and R. B. Wiringa

Phys. Rev. C 95, 014310 – Published 11 January 2017

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Ground-state properties of ${}^{5}H$ from the ${}^{6}{He} (d, {}^{3}{He}) {}^{5}H$ reaction