Indications for a bound tetraneutron
| Autor: | Roman Gernhäuser, Thomas Faestermann, Andreas Bergmaier, Mahmoud Mahgoub, Dominik Koll |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Physics
Neutron-rich nuclei Nuclear and High Energy Physics stable beams QC1-999 Binding energy 4n Tetraneutron Multi-nucleon transfer Interpretation (model theory) Neutron matter resonance Excited state Energy spectrum nuclear structure magnetic spectrograph Limit (mathematics) Atomic physics Q3D Excitation Nuclear Physics |
| Zdroj: | Physics Letters Physics Letters B 824(2022), 136799 Physics Letters B, Vol 824, Iss, Pp 136799-(2022) |
| Popis: | Using the reaction $^{7}$Li($^{7}$Li,$^{10}$C) we tried to populate states in the tetraneutron. A peak in the energy spectrum of identified $^{10}$C, which we cannot attribute to a reaction with any other of the target components, corresponds to an excitation of the $^{10}$C+4n system of 2.93±0.16 MeV. Under different kinematic conditions an equivalent peak was observed. For a binding energy of the tetraneutron of −2.93 MeV a much larger width than the observed upper limit of Γ<0.24 MeV (mainly due to experimental spread) is expected. Therefore, we favor the interpretation that this peak corresponds to $^{10}$C in the first excited state at 3.354 MeV and a tetraneutron with a binding energy of +0.42±0.16 MeV. |
| Databáze: | OpenAIRE |
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