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Observation of a correlated free four-neutron system.
Duer, M; Aumann, T; Gernhäuser, R; Panin, V; Paschalis, S; Rossi, D M; Achouri, N L; Ahn, D; Baba, H; Bertulani, C A; Böhmer, M; Boretzky, K; Caesar, C; Chiga, N; Corsi, A; Cortina-Gil, D; Douma, C A; Dufter, F; Elekes, Z; Feng, J; Fernández-Domínguez, B; Forsberg, U; Fukuda, N; Gasparic, I; Ge, Z; Gheller, J M; Gibelin, J; Gillibert, A; Hahn, K I; Halász, Z; Harakeh, M N; Hirayama, A; Holl, M; Inabe, N; Isobe, T; Kahlbow, J; Kalantar-Nayestanaki, N; Kim, D; Kim, S; Kobayashi, T; Kondo, Y; Körper, D; Koseoglou, P; Kubota, Y; Kuti, I; Li, P J; Lehr, C; Lindberg, S; Liu, Y; Marqués, F M.
Afiliación
  • Duer M; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany. mduer@ikp.tu-darmstadt.de.
  • Aumann T; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Gernhäuser R; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
  • Panin V; Helmholtz Forschungsakademie Hessen für FAIR, Frankfurt, Germany.
  • Paschalis S; Technische Universität München, Physik Department, Garching, Germany.
  • Rossi DM; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
  • Achouri NL; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Ahn D; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Baba H; Department of Physics, University of York, York, UK.
  • Bertulani CA; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Böhmer M; LPC-Caen, IN2P3/CNRS, UniCaen, ENSICAEN, Normandie Université, Caen, France.
  • Boretzky K; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Caesar C; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon, Korea.
  • Chiga N; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Corsi A; Department of Physics and Astronomy, Texas A&M University-Commerce, Commerce, TX, USA.
  • Cortina-Gil D; Technische Universität München, Physik Department, Garching, Germany.
  • Douma CA; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
  • Dufter F; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Elekes Z; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
  • Feng J; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Fernández-Domínguez B; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Forsberg U; IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
  • Fukuda N; Dpt. de Física de Partículas, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
  • Gasparic I; Nuclear Energy group, ESRIG, University of Groningen, Groningen, The Netherlands.
  • Ge Z; Technische Universität München, Physik Department, Garching, Germany.
  • Gheller JM; Atomki, Eötvös Loránd Research Network (ELKH), Debrecen, Hungary.
  • Gibelin J; State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China.
  • Gillibert A; Dpt. de Física de Partículas, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
  • Hahn KI; Department of Physics, University of York, York, UK.
  • Halász Z; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Harakeh MN; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Hirayama A; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Holl M; Rudjer Boskovic Institute, Zagreb, Croatia.
  • Inabe N; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Isobe T; IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
  • Kahlbow J; LPC-Caen, IN2P3/CNRS, UniCaen, ENSICAEN, Normandie Université, Caen, France.
  • Kalantar-Nayestanaki N; IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
  • Kim D; Ewha Womans University, Seoul, Korea.
  • Kim S; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon, Korea.
  • Kobayashi T; Atomki, Eötvös Loránd Research Network (ELKH), Debrecen, Hungary.
  • Kondo Y; Nuclear Energy group, ESRIG, University of Groningen, Groningen, The Netherlands.
  • Körper D; Department of Physics, Tokyo Institute of Technology, Tokyo, Japan.
  • Koseoglou P; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Kubota Y; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Kuti I; RIKEN Nishina Center for Accelerator-Based Science, Wako, Japan.
  • Li PJ; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Lehr C; Nuclear Energy group, ESRIG, University of Groningen, Groningen, The Netherlands.
  • Lindberg S; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon, Korea.
  • Liu Y; Technische Universität Darmstadt, Fachbereich Physik, Darmstadt, Germany.
  • Marqués FM; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon, Korea.
Nature ; 606(7915): 678-682, 2022 06.
Article en En | MEDLINE | ID: mdl-35732764
A long-standing question in nuclear physics is whether chargeless nuclear systems can exist. To our knowledge, only neutron stars represent near-pure neutron systems, where neutrons are squeezed together by the gravitational force to very high densities. The experimental search for isolated multi-neutron systems has been an ongoing quest for several decades1, with a particular focus on the four-neutron system called the tetraneutron, resulting in only a few indications of its existence so far2-4, leaving the tetraneutron an elusive nuclear system for six decades. Here we report on the observation of a resonance-like structure near threshold in the four-neutron system that is consistent with a quasi-bound tetraneutron state existing for a very short time. The measured energy and width of this state provide a key benchmark for our understanding of the nuclear force. The use of an experimental approach based on a knockout reaction at large momentum transfer with a radioactive high-energy 8He beam was key.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nature Año: 2022 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nature Año: 2022 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido