Observation of a broad $p$-wave resonant state in $^{9}$He

Y. L. Sun; A. Corsi; Y. Kubota; G. Authelet; H. Baba; C. Caesar; D. Calvet; A. Delbart; M. Dozono; J. Feng; F. Flavigny; J. -M. Gheller; J. Gibelin; A. Giganon; A. Gillibert; S. Giraud; K. Hasegawa; T. Isobe; Y. Kanaya; S. Kawakami; D. Kim; Y. Kiyokawa; M. Kobayashi; N. Kobayashi; T. Kobayashi; Y. Kondo; Z. Korkulu; S. Koyama; V. Lapoux; Y. Maeda; F. M. Marques; T. Miyazaki; T. Motobayashi; T. Nakamura; N. Nakatsuka; Y. Nishio; A. Obertelli; A. Ohkura; N. A. Orr; S. Ota; H. Otsu; T. Ozaki; V. Panin; S. Paschalis; E. C. Pollacco; S. Reichert; J. -Y. Rousse; A. T. Saito; S. Sakaguchi; M. Sako; C. Santamaria; M. Sasano; H. Sato; M. Shikata; Y. Shimizu; Y. Shindo; L. Stuhl; T. Sumikama; M. Tabata; Y. Togano; J. Tsubota; Z. H. Yang; J. Yasuda; K. Yoneda; J. Zenihiro; T. Uesaka

arXiv · 2602.07810

Observation of a broad $p$-wave resonant state in $^{9}$He

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Abstract

We report on the two-body invariant-mass spectroscopy of $^{9}$He, populated via the 1$p$1$n$ knockout reaction from the two-neutron halo nucleus $^{11}$Li at $\sim$250 MeV/nucleon. A broad $p$-wave resonant state of $^{9}$He was observed at 1.28(1) MeV with a width of 0.82(4) MeV.

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Y. L. Sun, A. Corsi, Y. Kubota, G. Authelet, H. Baba, C. Caesar, D. Calvet, A. Delbart, M. Dozono, J. Feng, F. Flavigny, J. -M. Gheller, J. Gibelin, A. Giganon, A. Gillibert, S. Giraud, K. Hasegawa, T. Isobe, Y. Kanaya, S. Kawakami, D. Kim, Y. Kiyokawa, M. Kobayashi, N. Kobayashi, T. Kobayashi, Y. Kondo, Z. Korkulu, S. Koyama, V. Lapoux, Y. Maeda, F. M. Marques, T. Miyazaki, T. Motobayashi, T. Nakamura, N. Nakatsuka, Y. Nishio, A. Obertelli, A. Ohkura, N. A. Orr, S. Ota, H. Otsu, T. Ozaki, V. Panin, S. Paschalis, E. C. Pollacco, S. Reichert, J. -Y. Rousse, A. T. Saito, S. Sakaguchi, M. Sako, C. Santamaria, M. Sasano, H. Sato, M. Shikata, Y. Shimizu, Y. Shindo, L. Stuhl, T. Sumikama, M. Tabata, Y. Togano, J. Tsubota, Z. H. Yang, J. Yasuda, K. Yoneda, J. Zenihiro, T. Uesaka. 2026-02-08. Observation of a broad $p$-wave resonant state in $^{9}$He. https://arxiv.org/abs/2602.07810

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