Determining Low-Energy Characteristics of the $$\boldsymbol{pp}$$ Interaction in the $${d+{}^{1}}\mathbf{H}{\to p+p+n}$$ Reaction

The study results of the $$d+{}^{1}\textrm{H}\to p+p+n$$ reaction are presented. A kinematically complete experiment with using a deuteron beam energy of 15.3 MeV at the U-120 accelerator of the Skobeltsyn Institute of Nuclear Physics of the Lomonosov Moscow State University was carried out. A proton from the breakup of the singlet $$pp$$ state and a secondary neutron were registered in coincidence. As a result of the study, the low-energy characteristics of $$pp$$ interaction, namely, the energy value of the virtual singlet $$pp$$ state and the corresponding value of the $$pp$$ scattering length were determined.