An article entitled “Observation of a positive-parity wave in the low-energy spectrum of ⁷Не” by a group of scientists from the Laboratory of Nuclear Reactions at JINR was published in Physical Review C.

JINR physicists studied the ⁷Не nucleus by the ¹Н(⁶Не, р)⁷Не reaction at 29A·MeV beam energy. The ⁷Не spectrum was measured up to an excitation energy of 8 MeV above the ⁶Не + ? threshold. The forward-backward asymmetry in the neutron emission from unbound states of ⁷Не was found. That implies the presence of a positive parity partial wave in the ⁷Не spectrum.

Missing mass spectrum of the ⁷Не from the ²H(⁶He ,?) reaction versus time of flight of the ⁷Не decay product from the target to the F6 detector

Authors: M.S. Golovkov, A.A. Bezbakh, A.S. Denikin, R. Wolski, S.G. Belogurov, D. Biare, V. Chudoba, E.M. Gazeeva, A.V. Gorshkov, G. Kaminski, B.R. Khamidullin, S.A. Krupko, B. Mauyey, I.A. Muzalevskii, W. Piatek, A.M. Quynh, R.S. Slepnev, A. Swiercz, P. Szymkiewicz, B. Zalewski.