Year: 2019
Type: article
Abstract: The first $\ensuremath{\gamma}$-ray spectroscopy of $^{52}\mathrm{Ar}$, with the neutron number $N=34$, was measured using the $^{53}\mathrm{K}(p,2p)$ one-proton removal reaction at $\ensuremath{\sim}210\text{ }\text{ }\mathrm{MeV}/\mathrm{u}$ at the RIBF facility. The ${2}_{1}^{+}$ 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 $^{54}\mathrm{Ca}$, i.e., below the magic proton number $Z=20$. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured ${2}_{1}^{+}$ systematics of neutron-rich Ar isotopes, and support a $N=34$ subshell closure in $^{52}\mathrm{Ar}$.
Source: Physical Review Letters
Authors: H. N. Liu, A. Obertelli, P. Doornenbal, C. A. Bertulani, G. Hagen, J. D. Holt, G. R. Jansen, T. D. Morris, A. Schwenk, R. Stroberg, N. Achouri, H. Baba, F. Browne, D. Calvet, F. Château, S. Chen, N. Chiga, A. Corsi, M. L. Cortés, A. Delbart, J.-M. Gheller, A. Giganon, A. Gillibert, C. Hilaire, T. Isobe, T. Kobayashi, Y. Kubota, V. Lapoux, T. Motobayashi, I. Murray, H. Otsu, V. Panin, N. Paul, W. Rodriguez, H. Sakurai, M. Sasano, D. Steppenbeck, L. Stuhl, Y. L. Sun, Y. Togano, T. Uesaka, K. Wimmer, K. Yoneda, O. Aktas, T. Aumann, L. X. Chung, F. Flavigny, S. Franchoo, I. Gašparić, R.-B. Gerst, J. Gibelin, K. I. Hahn, D. Kim, T. Koiwai, Y. Kondo, P. Koseoglou, J. Lee, C. Lehr, B. D. Linh, T. Lokotko, M. MacCormick, K. Moschner, T. Nakamura, S. Y. Park, D. Rossi, E. Sahin, D. Sohler, P.-A. Söderström, S. Takeuchi, H. Törnqvist, V. Vaquero, V. Wagner, S. Wang, V. Werner, X. Xu, H. Yamada, D. Yan, Z. Yang, M. Yasuda, L. Zanetti
Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, Technische Universität Darmstadt, Institut de Recherche sur les Lois Fondamentales de l'Univers, Département de Physique Nucléaire, KTH Royal Institute of Technology, RIKEN, RIKEN Nishina Center, East Texas A&M University, Oak Ridge National Laboratory, University of Tennessee at Knoxville, TRIUMF, GSI Helmholtz Centre for Heavy Ion Research, Max Planck Institute for Nuclear Physics, ExtreMe Matter Institute EMMI, Université Paris-Sud, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules, Peking University, State Key Laboratory of Nuclear Physics and Technology, University of Hong Kong, Tohoku University, The University of Tokyo, Universidad Nacional de Colombia, Rikkyo University, Institute for Nuclear Science and Technology, Ruđer Bošković Institute, University of Cologne, École Nationale Supérieure d'Ingénieurs de Caen, Laboratoire de Physique Corpusculaire de Caen, Université de Caen Normandie, Ewha Womans University, Tokyo Institute of Technology, University of Oslo, HUN-REN Institute for Nuclear Research, Consejo Superior de Investigaciones Científicas, Instituto de Estructura de la Materia, Chinese Academy of Sciences, Institute of Modern Physics
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: National Science Foundation, U.S. Department of Energy, European Commission, Deutsche Forschungsgemeinschaft, Ministry of Education, Culture, Sports, Science and Technology, National Research Foundation of Korea, Hrvatska Zaklada za Znanost, Helmholtz International Center for FAIR, Office of Science, Horizon 2020 Framework Programme, Seventh Framework Programme, Natural Sciences and Engineering Research Council of Canada, National Research Council Canada, Japan Society for the Promotion of Science, RIKEN, Nuclear Physics, Oak Ridge National Laboratory, H2020 European Research Council, H2020 Marie Skłodowska-Curie Actions
Awards: New Tools for Radiative Neutron Capture in Stars and on Earth, G121915436, G138487567, G1528409558, G1645119126, G1720871899, G1883778784, G1964481635, G203625172, G2041784927, G222768804, G2411683797, G2651529389, G2715909221, G275679244, G2988778103, G3032876407, G3049477530, Enhanced Eurotalents: a European programme for transnational mobility of experimented researchers managed by CEA, G3345895242, REACTIONS WITH RARE ISOTOPES, G3510889102, Dineutron in unstable nuclei probed by spin correlations, G3912533391, Study of neutrno-rich nuclei via isospin-increasing charge exchange reaction, G4287938924, NUCLEAR COMPUTATIONAL LOW ENERGY INITIATIVE (NUCLEI), G4423657506, REACTIONS WITH RARE ISOTOPES, G4937468798, G4964539609, G5467340360, G5478458683, G5573126869, Production and decay of Hypernuclei by using an intense heavy-ion beam incidenting on a Proton target, G6329715174, G6486853205, Two neutron correlation measurement for nuclei beyond the neutron drip line, G675320460, G6911681599, G7306880203, SFB 1245: Atomkerne: Von fundamentalen Wechselwirkungen zu Struktur und Sternen, REACTIONS WITH RARE ISOTOPES, G8269158468, G8512683158, G8906985441, G8943473799, G89955983
OpenAlex ID: W2900844103