Speaker
Marcell Begala
(HUN-REN Atomki)
Description
Changes in the nuclear shell closures approaching the neutron drip line are among the key topics in contemporary nuclear structure research. Although the bound excited states of neutron-rich isotopes have been extensively investigated, information on the unbound states remains rather scarce. Neutron-unbound states in $^{50}$Ar and $^{52}$Ar were studied via the (p,2p) reaction using invariant-mass spectroscopy. Narrow resonances near the neutron separation energy were observed and compared with theoretical predictions, enabling tentative spin-parity assignments. The agreement between the predicted and observed level structures supports the persistence of the $N$=32 and $N$=34 shell gaps in neutron-rich argon isotopes.
Author
Marcell Begala
(HUN-REN Atomki)
Co-authors
D. Sohler
(HUN-REN ATOMKI, P.O. Box 51, H-4001 Debrecen, Hungary)
Z. Elekes
(HUN-REN ATOMKI, P.O. Box 51, H-4001 Debrecen, Hungary; Institute of Physics, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary)
M.M. Juh\'asz
(HUN-REN ATOMKI, P.O. Box 51, H-4001 Debrecen, Hungary)
Y. Utsuno
(Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan)
K. Yoshida
(Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan; Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN, Wako 351-0198, Japan)
T. Otsuka
(Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium)
K. Ogata
(Department of Physics, Kyushu University, Fukuoka 819-0395, Japan)
P. Doornenbal
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
A. Obertelli
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
H. Baba
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
F. Browne
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
D. Calvet
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
F. Ch\^ateau
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
S. Chen
(State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People’s Republic of China; Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
N. Chiga
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
A. Corsi
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
M.L. Cort\'es
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
A. Delbart
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
J.-M. Gheller
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
A. Giganon
(IRFU, CEA, Universit\'e Paris-Saclay, F-91191 Gif-sur-Yvette, France)
A. Gillibert
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
C. Hilaire
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
T. Isobe
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
T. Kobayashi
(Department of Physics, Tohoku University, Sendai 980-8578, Japan)
Y. Kubota
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan)
V. Lapoux
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
T. Motobayashi
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
I. Murray
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France)
H. Otsu
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
V. Panin
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
N. Paul
(IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
W. Rodriguez
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Universidad Nacional de Colombia, Sede Bogota, Facultad de Ciencias, Departamento de Física, 111321, Bogotá, Colombia; Pontificia Universidad Javeriana, Facultad de Ciencias, Departamento de Física, Bogotá, Colombia)
H. Sakurai
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan)
M. Sasano
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
D. Steppenbeck
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
L. Stuhl
(Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan;HUN-REN ATOMKI, P.O. Box 51, H-4001 Debrecen, Hungary)
Y.L. Sun
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany;IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France)
Y. Togano
(Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 172-8501, Japan)
T. Uesaka
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
K. Wimmer
(Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan;RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
K. Yoneda
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
N.L. Achouri
(LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F-14050 Caen, France)
O. Aktas
(Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden)
T. Aumann
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany;GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany)
L.X. Chung
(Institute for Nuclear Science and Technology, VINATOM, P.O. Box 5T-160, Nghia Do, Hanoi, Viet Nam)
F. Flavigny
(LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F-14050 Caen, France)
S. Franchoo
(Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France)
I. Gašparić
(Ruđer Bošković Institute, Bijeniča cesta 54, 10000 Zagreb, Croatia;RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
R.-B. Gerst
(Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany)
J. Gibelin
(LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F-14050 Caen, France)
K.I. Hahn
(Ewha Womans University, Seoul 120-750, Republic of Korea)
D. Kim
(Ewha Womans University, Seoul 120-750, Republic of Korea;RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
T. Koiwai
(Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan)
Y. Kondo
(Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan)
P. Koseoglou
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany;GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany)
J. Lee
(Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong)
C. Lehr
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany)
B.D. Linh
(Institute for Nuclear Science and Technology, VINATOM, P.O. Box 5T-160, Nghia Do, Hanoi, Viet Nam)
H.N. Liu
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany;IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; Institute for Nuclear Science and Technology, VINATOM, P.O. Box 5T-160, Nghia Do, Hanoi, Viet Nam)
T. Lokotko
(Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong)
M. MacCormick
(Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France)
K. Moschner
(Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany)
T. Nakamura
(Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan)
S.Y. Park
(Ewha Womans University, Seoul 120-750, Republic of Korea)
D. Rossi
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany;GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany)
E. Sahin
(Department of Physics, University of Oslo, N-0316 Oslo, Norway)
P.-A. Söderström
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
S. Takeuchi
(Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan)
H. Törnqvist
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany;GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany)
V. Vaquero
(Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain)
V. Wagner
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany)
S. Wang
(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China)
V. Werner
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany)
X. Xu
(Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong)
H. Yamada
(Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan)
D. Yan
(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China)
Z. Yang
(RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
M. Yasuda
(Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan)
L. Zanetti
(Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany)