Quasifree (p, pN) scattering of light neutron-rich nuclei near N=14

被引：16

作者：

Diaz Fernandez, P. ^{[1
,2
,3
]}

Alvarez-Pol, H. ^{[2
,3
]}

Crespo, R. ^{[4
,5
]}

Cravo, E. ^{[6
]}

Atar, L. ^{[7
]}

Deltuva, A. ^{[8
]}

Aumann, T. ^{[7
,9
]}

Avdeichikov, V. ^{[10
]}

Beceiro-Novo, S. ^{[11
]}

Bemmerer, D. ^{[12
]}

Benlliure, J. ^{[2
,3
]}

Bertulani, C. A. ^{[13
]}

Boillos, J. M. ^{[2
,3
]}

Boretzky, K. ^{[9
]}

Borge, M. J. G. ^{[14
]}

Caamano, M. ^{[2
,3
]}

Cabanelas, P. ^{[2
,3
]}

Caesar, C. ^{[7
,9
]}

Casarejos, E. ^{[15
]}

Catford, W. ^{[16
]}

Cederkall, J. ^{[10
]}

Chartier, M. ^{[17
]}

Chulkov, L. V. ^{[18
]}

Cortina-Gil, D. ^{[2
,3
]}

Pramanik, U. Datta ^{[19
]}

Dillmann, I. ^{[9
,20
]}

Elekes, Z. ^{[12
]}

Enders, J. ^{[7
]}

Ershova, O. ^{[21
]}

Estrade, A. ^{[9
,22
]}

Farinon, F. ^{[9
]}

Fernandez-Dominguez, B. ^{[2
,3
]}

Fraile, L. M. ^{[23
,24
]}

Freer, M. ^{[25
]}

Galaviz, D. ^{[26
,27
]}

Geissel, H. ^{[9
]}

Gernhaeuser, R. ^{[28
]}

Golubev, P. ^{[10
]}

Goebel, K. ^{[21
]}

Hagdahl, J. ^{[1
]}

Heftrich, T. ^{[21
]}

Heil, M. ^{[9
]}

Heine, M. ^{[7
]}

Heinz, A. ^{[1
]}

Henriques, A. ^{[26
]}

Holl, M. ^{[7
]}

Hufnagel, A. ^{[7
]}

Ignatov, A. ^{[7
]}

Johansson, H. T. ^{[1
]}

Jonson, B. ^{[1
]}

机构：

[1] Chalmers Tek Hogskola, Inst Fys, S-41296 Gothenburg, Sweden

[2] Univ Santiago de Compostela, Dept Fis TeorParticulas, Santiago De Compostela 15706, Spain

[3] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias, IGFAE, Santiago De Compostela 15706, Spain

[4] Inst Super Tecn, Dept Fis, Av Rovisco Pais 1, P-1049001 Lisbon, Portugal

[5] Univ Lisbon, Ctr Ciencias & Tecnol Nucleares, Estrada Nacl 10, P-2695066 Bobadela, Portugal

[6] Univ Lisbon, Ctr Fis Nucl, PT-1649003 Lisbon, Portugal

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

[8] Vilnius Univ, Inst Theoret Phys & Astron, LT-10222 Vilnius, Lithuania

[9] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany

[10] Lund Univ, Dept Phys, S-22100 Lund, Sweden

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

[12] Helmholtz Zentrum Dresden Rossendorf, D-01328 Dresden, Germany

[13] Texas A&M Univ, Dept Phys & Astron, Commerce, TX 75429 USA

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

[15] Univ Vigo, E-36310 Vigo, Spain

[16] Univ Surrey, Dept Phys, Guildford GU2 5FH, Surrey, England

[17] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 3BX, Merseyside, England

[18] NRC Kurchatov Inst, Pl Akad Kurchatova, Moscow, Russia

[19] Saha Inst Nucl Phys, 1-AF Bidhan Nagar, Kolkata 700064, India

[20] Justus Liebig Univ Giessen, Giessen, Germany

[21] Goethe Univ Frankfurt Am Main, D-60438 Frankfurt, Germany

[22] St Marys Univ, Astron & Phys Dept, Halifax, NS B3H 3C3, Canada

[23] Univ Complutense Madrid, Grp Fis Nucl, E-28040 Madrid, Spain

[24] Univ Complutense Madrid, IPARCOS, E-28040 Madrid, Spain

[25] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[26] LIP, Lab Instrumentacao & Fis Expt Particulas, P-1649003 Lisbon, Portugal

[27] Univ Lisbon, Fac Ciencias, P-1749016 Lisbon, Portugal

[28] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany

[29] Univ Groningen, KVI CART, Zernikelaan 25, NL-9747 AA Groningen, Netherlands

[30] STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England

[31] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Fis, Lab Instrumentacao Engn Biomed & Fis Rad LIBPhys, P-2829516 Monte De Caparica, Portugal

[32] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[33] Univ Seville, Dept FAMN, E-41080 Seville, Spain

[34] Univ York, Dept Phys, Heslington YO10 5DD, England

[35] Tech Univ, Inst Kern & Teilchenphys, D-01069 Dresden, Germany

[36] FIAS, Frankfurt, Germany

[37] CNRS, IN2P3, GANIL, CEA DSM, BP 55027, F-14076 Caen 5, France

[38] GANIL, F-14076 Caen, France

[39] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[40] Univ Cologne, Inst Kernphys, Cologne, Germany

来源：

PHYSICAL REVIEW C | 2018年 / 97卷 / 02期

基金：

瑞典研究理事会;

关键词：

D O I：

10.1103/PhysRevC.97.024311

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Background: For many years, quasifree scattering reactions in direct kinematics have been extensively used to study the structure of stable nuclei, demonstrating the potential of this approach. The (RB)-B-3 collaboration has performed a pilot experiment to study quasifree scattering reactions in inverse kinematics for a stable C-12 beam. The results from that experiment constitute the first quasifree scattering results in inverse and complete kinematics. This technique has lately been extended to exotic beams to investigate the evolution of shell structure, which has attracted much interest due to changes in shell structure if the number of protons or neutrons is varied. Purpose: In this work we investigate for the first time the quasifree scattering reactions (p, pn) and (p, 2p) simultaneously for the same projectile in inverse and complete kinematics for radioactive beams with the aim to study the evolution of single-particle properties from N = 14 to N = 15. Method: The structure of the projectiles O-23, O-22, and N-21 has been studied simultaneously via (p, pn) and (p, 2p) quasifree knockout reactions in complete inverse kinematics, allowing the investigation of proton and neutron structure at the same time. The experimental data were collected at the (RB)-B-3-LAND setup at GSI at beam energies of around 400 MeV/u. Two key observables have been studied to shed light on the structure of those nuclei: the inclusive cross sections and the corresponding momentum distributions. Conclusions: The knockout reactions (p, pn) and (p, 2p) with radioactive beams in inverse kinematics have provided important and complementary information for the study of shell evolution and structure. For the (p, pn) channels, indications of a change in the structure of these nuclei moving from N = 14 to N = 15 have been observed, i.e., from the 0d(5/2) shell to the 1s(1/2). This supports previous observations of a subshell closure at N = 14 for neutron-rich oxygen isotopes and its weakening for the nitrogen isotopes.

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页数：13

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