Yu. B. Gurov, B. A. Chernyshev, S. A. Evseev, S. V. Rozov, V. G. Sandukovsky, M. V. Tel’kushev
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引用次数: 0
Abstract
The formation of the multineutron systems \({}^{2}n\) and \({}^{3}n\) was studied in the reactions of stopped pion absorption by \({}^{9}\)Be nuclei. Measurements were carried out at low energy pion channel of LANL using two-arm multilayer semiconductor spectrometer. The bound states of \({}^{2}n\) and \({}^{3}n\) have not been found. In the missing mass spectrum of the reaction \({}^{9}\)Be(\(\pi^{-}\), \(t^{4}\)He), a peak was observed near the threshold, which is due to the formation of the \(s\)-wave virtual state of the dineutron. Indications of the existence of two states of the \({}^{3}n\) with resonant energies (\(E_{r}\approx 6\) MeV, and \({\approx}14\) MeV) were first obtained in the reactions \({}^{9}\)Be(\(\pi^{-}\), \(d^{4}\)He) and \({}^{9}\)Be(\(\pi^{-}\), \(t^{3}\)He). Comparison with theoretical and experimental results obtained by other authors was performed.
期刊介绍:
Physics of Atomic Nuclei is a journal that covers experimental and theoretical studies of nuclear physics: nuclear structure, spectra, and properties; radiation, fission, and nuclear reactions induced by photons, leptons, hadrons, and nuclei; fundamental interactions and symmetries; hadrons (with light, strange, charm, and bottom quarks); particle collisions at high and superhigh energies; gauge and unified quantum field theories, quark models, supersymmetry and supergravity, astrophysics and cosmology.