$\boldsymbol{N=32}$ shell closure below calcium: Low-lying structure of $^{50}$Ar
Abstract
Low-lying excited states in the isotope Ar were investigated by in-beam -ray spectroscopy following proton- and neutron-knockout, multi-nucleon removal, and proton inelastic scattering at the RIKEN Radioactive Isotope Beam Factory. The energies of the two previously reported transitions have been confirmed, and five additional states are presented for the first time, including a candidate for a 3 state. The level scheme built using coincidences was compared to shell-model calculations in the model space, and to ab initio predictions based on chiral two- and three-nucleon interactions. Theoretical proton- and neutron-knockout cross sections suggest that two of the new transitions correspond to states, while the previously proposed state could also correspond to a state.
Keywords
Cite
@article{arxiv.2011.10786,
title = {$\boldsymbol{N=32}$ shell closure below calcium: Low-lying structure of $^{50}$Ar},
author = {M. L. Cortés and W. Rodriguez and P. Doornenbal and A. Obertelli and J. D. Holt and J. Menéndez and K. Ogata and A. Schwenk and N. Shimizu and J. Simonis and Y. Utsuno and K. Yoshida and L. Achouri and H. Baba and F. Browne and D. Calvet and F. Château and S. Chen and N. Chiga and A. Corsi and A. Delbart and J-M. Gheller and A. Giganon and A. Gillibert and C. Hilaire and T. Isobe and T. Kobayashi and Y. Kubota and V. Lapoux and H. N. Liu and T. Motobayashi and I. Murray and H. Otsu and V. Panin and N. Paul and H. Sakurai and M. Sasano and D. Steppenbeck and L. Stuhl and Y. L. Sun and Y. Togano and T. Uesaka and K. Wimmer and K. Yoneda and O. Aktas and T. Aumann and L. X. Chung and F. Flavigny and S. Franchoo and I. Gašparić and R. -B. Gerst and J. Gibelin and K. I. Hahn and D. Kim and T. Koiwai and Y. Kondo and P. Koseoglou and J. Lee and C. Lehr and B. D. Linh and T. Lokotko and M. MacCormick and K. Moschner and T. Nakamura and S. Y. Park and D. Rossi and E. Sahin and P. -A. Söderström and D. Sohler and S. Takeuchi and H. Toernqvist and V. Vaquero and V. Wagner and S. Wang and V. Werner and X. Xu and H. Yamada and D. Yan and Z. Yang and M. Yasuda and L. Zanetti},
journal= {arXiv preprint arXiv:2011.10786},
year = {2021}
}
Comments
Accepted for Phys. Rev. C