Data on neutron-neutron scattering length extracted in the n+2H-->n+n+p reaction at 60 MeV

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

doi:10.1134/S1063778820040146

paper

Data on neutron-neutron scattering length extracted in the n+2H-->n+n+p reaction at 60 MeV

arXiv:1911.05450 · doi:10.1134/S1063778820040146

Abstract

$^{1} S_{0}$ \textit{nn}-scattering length has been measured in the \textit{nd}-breakup reaction at 60 MeV. The experiment was performed in the final state interaction geometry with registration of all three secondary particles. The scattering length $a_{nn} = - 16.3 \pm 0.5$ ~fm was obtained from a comparison of the experimental dependence of the \textit{nd}-breakup yield on the relative energy of \textit{nn}-pair with the simulation results. An analysis of this value of scattering length together with the data obtained in other experiments on \textit{nd}- and \textit{dd}-breakup confirms the hypothesis about the influence of $3 N$ -forces on the values of \textit{nn}-interaction parameters extracted in these reactions.

10 pages, 6 figures