Pairing Forces Govern Population of Doubly Magic 54Ca from Direct Reactions

被引：11

作者：

Browne, F. ^{[1
]}

Chen, S. ^{[1
,2
,3
]}

Doornenbal, P. ^{[1
]}

Obertelli, A. ^{[1
,4
,5
]}

Ogata, K. ^{[6
,7
]}

Utsuno, Y. ^{[8
,9
]}

Yoshida, K. ^{[9
]}

Achouri, N. L. ^{[10
]}

Baba, H. ^{[1
]}

Calvet, D. ^{[5
]}

Chateau, F. ^{[5
]}

Chiga, N. ^{[1
]}

Corsi, A. ^{[5
]}

Cortes, M. L. ^{[1
]}

Delbart, A. ^{[5
]}

Gheller, J-M ^{[5
]}

Giganon, A. ^{[5
]}

Gillibert, A. ^{[5
]}

Hilaire, C. ^{[5
]}

Isobe, T. ^{[1
]}

Kobayashi, T. ^{[11
]}

Kubota, Y. ^{[1
,8
]}

Lapoux, V ^{[5
]}

Liu, H. N. ^{[5
,12
]}

Motobayashi, T. ^{[1
]}

Murray, I ^{[1
,13
,14
]}

Otsu, H. ^{[1
]}

Panin, V ^{[1
]}

Paul, N. ^{[5
]}

Rodriguez, W. ^{[1
,15
,16
]}

Sakurai, H. ^{[1
,17
]}

Sasano, M. ^{[1
]}

Steppenbeck, D. ^{[1
]}

Stuhl, L. ^{[8
,30
]}

Sun, Y. L. ^{[5
]}

Togano, Y. ^{[18
]}

Uesaka, T. ^{[1
]}

Wimmer, K. ^{[1
,17
,28
]}

Yoneda, K. ^{[1
]}

Aktas, O. ^{[12
]}

Aumann, T. ^{[4
,19
]}

Boretzky, K. ^{[1
,19
]}

Caesar, C. ^{[1
,4
,19
]}

Chung, L. X. ^{[20
]}

Flavigny, F. ^{[13
,14
]}

Franchoo, S. ^{[13
,14
]}

Gasparic, I ^{[1
,4
,21
]}

Gerst, R-B ^{[22
]}

Gibelin, J. ^{[10
]}

Hahn, K., I ^{[23
,30
]}

机构：

[1] RIKEN Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[2] Univ Hong Kong, Dept Phys, Pokfulam, Hong Kong 999077, Peoples R China

[3] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[4] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[5] Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France

[6] Osaka Univ, Res Ctr Nucl Phys RCNP, Ibaraki 5670047, Japan

[7] Osaka City Univ, Dept Phys, Osaka 5588585, Japan

[8] Univ Tokyo, Ctr Nucl Study, RIKEN Campus, Wako, Saitama 3510198, Japan

[9] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[10] Univ Caen, ENSICAEN, LPC Caen, CNRS IN2P3, F-14050 Caen, France

[11] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[12] KTH Royal Inst Technol, S-10691 Stockholm, Sweden

[13] CNRS, IPN Orsay, F-91406 Orsay, France

[14] Univ Paris Saclay, F-91406 Orsay, France

[15] Univ Nacl Colombia, Fac Ciencias, Dept Fis, Sede Bogota, Bogota 111321, Colombia

[16] Pontificia Univ Javeriana, Fac Ciencias, Dept Fis, Bogota, Colombia

[17] Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[18] Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan

[19] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany

[20] VINATOM, Inst Nucl Sci & Technol, POB 5T-160, Hanoi, Vietnam

[21] Rudjer Boskovic Inst, Bijenicka Cesta 54, Zagreb 10000, Croatia

[22] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[23] Ewha Womans Univ, Seoul 03760, South Korea

[24] Tokyo Inst Technol, Dept Phys, Meguro Ku, 2-12-1 O Okayama, Tokyo 1528551, Japan

[25] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[26] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[27] Atomki, POB 51, H-4001 Debrecen, Hungary

[28] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[29] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[30] Inst for Basic Sci Korea, Daejeon 34126, South Korea

[31] Tohoku Univ, Dept Phys, Aoba Ku, 6-3 Aramaki Aoba, Sendai, Miyagi 9808578, Japan

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 25期

基金：

瑞典研究理事会; 日本学术振兴会;

关键词：

MINOS;

D O I：

10.1103/PhysRevLett.126.252501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Direct proton-knockout reactions of Sc-55 at similar to 220 MeV/nucleon were studied at the RIKEN Radioactive Isotope Beam Factory. Populated states of Ca-54 were investigated through -ray and invariant-mass spectroscopy. Level energies were calculated from the nuclear shell model employing a phenomenological intemucleon interaction. Theoretical cross sections to states were calculated from distorted-wave impulse approximation estimates multiplied by the shell model spectroscopic factors, which describe the wave function overlap of the Sc-55 ground state with states in Ca-54. Despite the calculations showing a significant amplitude of excited neutron configurations in the ground-state of Sc-55, valence proton removals populated predominantly the ground state of Ca-54. This counterintuitive result is attributed to pairing effects leading to a dominance of the ground-state spectroscopic factor. Owing to the ubiquity of the pairing interaction, this argument should be generally applicable to direct knockout reactions from odd-even to even-even nuclei.

引用

页数：7

共 35 条

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