Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

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

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.

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

Abstract

We report on the two-body invariant-mass spectroscopy of He, populated via the 11 knockout reaction from the two-neutron halo nucleus Li at 250 MeV/nucleon. A broad -wave resonant state of He was observed at 1.28(1) MeV with a width of 0.82(4) MeV.
Paper Structure (1 section, 2 figures)

This paper contains 1 section, 2 figures.

Table of Contents

  1. References

Figures (2)

  • Figure 1: (Color online) (top panel) Experimental $^{8}$He-$\textit{n}$ relative energy spectrum obtained from the $^{11}$Li(-1$\textit{p}$1$\textit{n}$) reaction. Contaminations from the $^{10}$He three-body phasespace decay (3PS) is shown by the blue-solid line. (lower panel) Spectrum after the contaminations subtraction and efficiency correction. The black solid line shows the fit results of a Breit-Wigner shape $p$-wave resonance folded with the experimental resolution (red short dashed line) on top of a constant background (blue long dashed line).
  • Figure 2: (Color online) The two-body $p$-wave resonant energy and decay width of $^{9}$He obtained by the present work compared with previous results from Seth $\textit{et al.}$Seth1987, Bohlen $\textit{et al.}$Bohlen1999, Rogachev $\textit{et al.}$Rogachev2003 and Kalanee $\textit{et al.}$Kalanee2013. The experimental data are also compared with the different theoretical predictions, including $\textit{ab initio}$ variational Monte Carlo (VMC) Nollett2012, Gamow-density-matrix renormalization-group (G-DMRG) Fossez2018, no-core shell model with continuum (NCSMC) Vorabbi2018, the shell model in continuum (CSM)Volya2005 as well as the Woods–Saxon (WS) potential and the R-matrix analysis of Ref. Barker2004.