Production of the neutron-rich nucleus 6H in an electron-scattering experiment at MAMI-A1

The neutron-rich hydrogen isotope ${}^{6}H$ is produced for the first time in an electron-scattering experiment at MAMI-A1. Making use of the three-spectrometer setup in the A1-hall, triple coincidences between the scattered electron, produced proton, and ${\pi }^{+}$, were measured with the reaction ${}^7\mathrm{Li}{(e,e^{\prime }p{\pi }^{+})}^{6}H$ which allowed to determine the missing-mass spectrum of ${}^{6}H$. The preliminary analysis signals a ground state energy of ${}^{6}H$ near 3 MeV. Our work presents a new possibility to produce neutron-rich nuclei with electron-scattering experiments.