Extended p_{3/2} Neutron Orbital and the N=32 Shell Closure in ^{52}Ca

M Enciu¹, H N Liu^{1

2

3}, A Obertelli^{1

4

5}, P Doornenbal⁵, F Nowacki⁶, K Ogata^{7

8}, A Poves⁹, K Yoshida¹⁰, N L Achouri¹¹, H Baba⁵, F Browne⁵, D Calvet⁴, F Château⁴, S Chen^{5

12

13}, N Chiga⁵, A Corsi⁴, M L Cortés⁵, A Delbart⁴, J-M Gheller⁴, A Giganon⁴, A Gillibert⁴, C Hilaire⁴, T Isobe⁵, T Kobayashi¹⁴, Y Kubota^{5

15}, V Lapoux⁴, T Motobayashi⁵, I Murray^{5

16}, H Otsu⁵, V Panin⁵, N Paul^{4

17}, W Rodriguez^{5

18

19}, H Sakurai^{5

20}, M Sasano⁵, D Steppenbeck⁵, L Stuhl^{15

21

22}, Y L Sun^{1

4}, Y Togano^{5

23}, T Uesaka⁵, K Wimmer^{5

20}, K Yoneda⁵, O Aktas³, T Aumann^{1

24}, L X Chung²⁵, F Flavigny^{11

16}, S Franchoo¹⁶, I Gasparic^{1

5

26}, R-B Gerst²⁷, J Gibelin¹¹, K I Hahn^{22

28}, D Kim^{5

22

28}, Y Kondo²⁹, P Koseoglou^{1

24}, J Lee¹², C Lehr¹, P J Li¹², B D Linh²⁵, T Lokotko¹², M MacCormick¹⁶, K Moschner²⁷, T Nakamura²⁹, S Y Park^{22

28}, D Rossi¹, E Sahin³⁰, P-A Söderström¹, D Sohler²¹, S Takeuchi²⁹, H Toernqvist^{1

24}, V Vaquero³¹, V Wagner¹, S Wang³², V Werner^{1

33}, X Xu¹², H Yamada²⁹, D Yan³², Z Yang⁵, M Yasuda²⁹, L Zanetti¹

Affiliations

¹ Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
² Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China.
³ Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden.
⁴ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
⁵ RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
⁶ Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France.
⁷ Department of Physics, Kyushu University, Fukuoka 819-0395, Japan.
⁸ Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan.
⁹ Departamento de Fisica Teorica and IFT UAM-CSIC, Universidad Autonoma de Madrid, Spain.
¹⁰ Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
¹¹ LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, F-14000 Caen, France.
¹² Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
¹³ State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
¹⁴ Department of Physics, Tohoku University, Sendai 980-8578, Japan.
¹⁵ Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan.
¹⁶ Université Paris-Saclay, CNRS/IN2P3, IJCLab, F-91405 Orsay cedex, France.
¹⁷ Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS, PSL Research University, Collège de France, Case 74, 4 Place Jussieu, 75005 Paris, France.
¹⁸ Pontificia Universidad Javeriana, Facultad de Ciencias, Departamento de Física, Bogotá, Colombia.
¹⁹ Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Física, Bogotá 111321, Colombia.
²⁰ Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
²¹ Institute for Nuclear Research, Atomki, P.O. Box 51, Debrecen H-4001, Hungary.
²² Institute for Basic Science, Daejeon 34126, Korea.
²³ Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 172-8501, Japan.
²⁴ GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany.
²⁵ Institute for Nuclear Science & Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
²⁶ Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
²⁷ Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany.
²⁸ Ewha Womans University, Seoul 03760, Korea.
²⁹ Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan.
³⁰ Department of Physics, University of Oslo, N-0316 Oslo, Norway.
³¹ Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain.
³² Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
³³ Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung, Campus Darmstadt, 64289 Darmstadt, Germany.

PMID: 36608181
DOI: 10.1103/PhysRevLett.129.262501

Extended p_{3/2} Neutron Orbital and the N=32 Shell Closure in ^{52}Ca

M Enciu et al. Phys Rev Lett. 2022.

. 2022 Dec 23;129(26):262501.

doi: 10.1103/PhysRevLett.129.262501.

Authors

Affiliations

¹ Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
² Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China.
³ Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden.
⁴ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
⁵ RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
⁶ Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France.
⁷ Department of Physics, Kyushu University, Fukuoka 819-0395, Japan.
⁸ Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan.
⁹ Departamento de Fisica Teorica and IFT UAM-CSIC, Universidad Autonoma de Madrid, Spain.
¹⁰ Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
¹¹ LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, F-14000 Caen, France.
¹² Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
¹³ State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
¹⁴ Department of Physics, Tohoku University, Sendai 980-8578, Japan.
¹⁵ Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan.
¹⁶ Université Paris-Saclay, CNRS/IN2P3, IJCLab, F-91405 Orsay cedex, France.
¹⁷ Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS, PSL Research University, Collège de France, Case 74, 4 Place Jussieu, 75005 Paris, France.
¹⁸ Pontificia Universidad Javeriana, Facultad de Ciencias, Departamento de Física, Bogotá, Colombia.
¹⁹ Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Física, Bogotá 111321, Colombia.
²⁰ Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
²¹ Institute for Nuclear Research, Atomki, P.O. Box 51, Debrecen H-4001, Hungary.
²² Institute for Basic Science, Daejeon 34126, Korea.
²³ Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 172-8501, Japan.
²⁴ GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany.
²⁵ Institute for Nuclear Science & Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
²⁶ Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
²⁷ Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany.
²⁸ Ewha Womans University, Seoul 03760, Korea.
²⁹ Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan.
³⁰ Department of Physics, University of Oslo, N-0316 Oslo, Norway.
³¹ Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain.
³² Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
³³ Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung, Campus Darmstadt, 64289 Darmstadt, Germany.

PMID: 36608181
DOI: 10.1103/PhysRevLett.129.262501

Abstract

The one-neutron knockout from ^{52}Ca in inverse kinematics onto a proton target was performed at ∼230 MeV/nucleon combined with prompt γ spectroscopy. Exclusive quasifree scattering cross sections to bound states in ^{51}Ca and the momentum distributions corresponding to the removal of 1f_{7/2} and 2p_{3/2} neutrons were measured. The cross sections, interpreted within the distorted-wave impulse approximation reaction framework, are consistent with a shell closure at the neutron number N=32, found as strong as at N=28 and N=34 in Ca isotopes from the same observables. The analysis of the momentum distributions leads to a difference of the root-mean-square radii of the neutron 1f_{7/2} and 2p_{3/2} orbitals of 0.61(23) fm, in agreement with the modified-shell-model prediction of 0.7 fm suggesting that the large root-mean-square radius of the 2p_{3/2} orbital in neutron-rich Ca isotopes is responsible for the unexpected linear increase of the charge radius with the neutron number.

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Extended p_{3/2} Neutron Orbital and the N=32 Shell Closure in ^{52}Ca

Affiliations

Extended p_{3/2} Neutron Orbital and the N=32 Shell Closure in ^{52}Ca

Authors

Affiliations

Abstract

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