Candidate Resonant Tetraneutron State Populated by the He 4 (He 8, Be 8) Reaction

  • K. Kisamori
  • , S. Shimoura
  • , H. Miya
  • , S. Michimasa
  • , S. Ota
  • , M. Assie
  • , H. Baba
  • , T. Baba
  • , D. Beaumel
  • , M. Dozono
  • , T. Fujii
  • , N. Fukuda
  • , S. Go
  • , F. Hammache
  • , E. Ideguchi
  • , N. Inabe
  • , M. Itoh
  • , D. Kameda
  • , S. Kawase
  • , T. Kawabata
  • M. Kobayashi, Y. Kondo, T. Kubo, Y. Kubota, M. Kurata-Nishimura, C. S. Lee, Y. Maeda, H. Matsubara, K. Miki, T. Nishi, S. Noji, S. Sakaguchi, H. Sakai, Y. Sasamoto, M. Sasano, H. Sato, Y. Shimizu, A. Stolz, H. Suzuki, M. Takaki, H. Takeda, S. Takeuchi, A. Tamii, L. Tang, H. Tokieda, M. Tsumura, T. Uesaka, K. Yako, Y. Yanagisawa, R. Yokoyama, K. Yoshida

Research output: Contribution to journalArticlepeer-review

Abstract

A candidate resonant tetraneutron state is found in the missing-mass spectrum obtained in the double-charge-exchange reaction He4(He8,Be8) at 186 MeV/u. The energy of the state is 0.83±0.65(stat)±1.25(syst) MeV above the threshold of four-neutron decay with a significance level of 4.9σ. Utilizing the large positive Q value of the (He8,Be8) reaction, an almost recoilless condition of the four-neutron system was achieved so as to obtain a weakly interacting four-neutron system efficiently.

Original languageEnglish
Article number052501
JournalPhysical Review Letters
Volume116
Issue number5
DOIs
Publication statusPublished - 03-02-2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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