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Data on Neutron–Neutron Scattering Length from the Reaction \(\boldsymbol{n+^{2}\textrm{H}\to n+n+p}\) at \(\boldsymbol{E_{n}=60}\) MeV

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Abstract

The \({}^{1}S_{0}\) neutron–neutron (\(nn\)) scattering length was measured in the neutron–deuteron (\(nd\)) breakup reaction at an energy of 60 MeV. The respective experiment was performed in the geometry of final-state interaction via detecting all three secondary particles. The scattering-length value of \(a_{nn}={-}16.3\pm 0.5\) fm was determined on the basis of a comparison of the experimental dependence of the \(nd\)-breakup reaction yield on the relative energy of the \(nn\) pair with the results of a simulation. An analysis of this scattering-length value, together with data obtained in other experiments devoted to studying \(nd\) and \(dd\) breakup, confirms the hypothesis that three-nucleon forces affect the values extracted from data on these reactions for the parameters of the \(nn\) interaction.

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Authors and Affiliations

  1. Institute for Nuclear Research, Russian Academy of Sciences, 117312, Moscow, Russia

    E. S. Konobeevski, A. A. Afonin, S. V. Zuyev, A. A. Kasparov, V. V. Mitcuk, M. V. Mordovskoy & S. I. Potashev

  2. Moscow Institute of Physics and Technology (State University), 141700, Dolgoprudnyi, Russia

    E. S. Konobeevski, V. V. Mitcuk & M. V. Mordovskoy

Authors
  1. E. S. Konobeevski
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  2. A. A. Afonin
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  3. S. V. Zuyev
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  4. A. A. Kasparov
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  5. V. V. Mitcuk
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  6. M. V. Mordovskoy
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  7. S. I. Potashev
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Correspondence to E. S. Konobeevski.

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Konobeevski, E.S., Afonin, A.A., Zuyev, S.V. et al. Data on Neutron–Neutron Scattering Length from the Reaction \(\boldsymbol{n+^{2}\textrm{H}\to n+n+p}\) at \(\boldsymbol{E_{n}=60}\) MeV. Phys. Atom. Nuclei 83, 523–529 (2020). https://doi.org/10.1134/S1063778820040146

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  • DOI: https://doi.org/10.1134/S1063778820040146

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