How Robust is the N = 34 Subshell Closure? First Spectroscopy of $^{52}$Ar
Nuclear Experiment
2019-03-01 v3 Nuclear Theory
Abstract
The first -ray spectroscopy of Ar, with the neutron number N = 34, was measured using the K(p,2p) one-proton removal reaction at 210 MeV/u at the RIBF facility. The 2 excitation energy is found at 1656(18) keV, the highest among the Ar isotopes with N 20. This result is the first experimental signature of the persistence of the N = 34 subshell closure beyond Ca, i.e., below the magic proton number Z = 20. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured 2 systematics of neutron-rich Ar isotopes, and support a N = 34 subshell closure in Ar.
Keywords
Cite
@article{arxiv.1811.08451,
title = {How Robust is the N = 34 Subshell Closure? First Spectroscopy of $^{52}$Ar},
author = {H. N. Liu and A. Obertelli and P. Doornenbal and C. A. Bertulani and G. Hagen and J. D. Holt and G. R. Jansen and T. D. Morris and A. Schwenk and R. Stroberg and N. Achouri and H. Baba and F. Browne and D. Calvet and F. Château and S. Chen and N. Chiga and A. Corsi and M. L. Cortés 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 T. Motobayashi and I. Murray and H. Otsu and V. Panin and N. Paul and W. Rodriguez 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 D. Sohler and P. -A. Söderström and S. Takeuchi and H. Törnqvist 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:1811.08451},
year = {2019}
}