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首页> 外文期刊>Physical review, C >Structure of Be-13 studied in proton knockout from B-14
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Structure of Be-13 studied in proton knockout from B-14

机译：BE-13的结构在B-14的质子敲除研究

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摘要

The neutron-unbound isotope Be-13 has been studied in several experiments using different reactions, different projectile energies, and different experimental setups. There is, however, no real consensus in the interpretation of the data, in particular concerning the structure of the low-lying excited states. Gathering new experimental information, which may reveal the Be-13 structure, is a challenge, particularly in light of its bridging role between Be-12, where the N = 8 neutron shell breaks down, and the Borromean halo nucleus Be-14. The purpose of the present study is to investigate the role of bound excited states in the reaction product Be-12 after proton knockout from B-14, by measuring coincidences between Be-12, neutrons, and gamma rays originating from de-excitation of states fed by neutron decay of Be-13. The Be-13 isotopes were produced in proton knockout from a 400 MeV/nucleon B-14 beam impinging on a CH2 target. The Be-12-n relative-energy spectrum d sigma/dE(fn) was obtained from coincidences between Be-12(g.s.) and a neutron, and also as threefold coincidences by adding gamma rays, from the de-excitation of excited states in Be-12. Neutron decay from the first 5/2(+) state in Be-13 to the 2(+) state in Be-12 at 2.11 MeV is confirmed. An energy independence of the proton-knockout mechanism is found from a comparison with data taken with a 35 MeV/nucleon B-14 beam. A low-lying p-wave resonance in Be-13(1/2(-)) is confirmed by comparing proton- and neutron-knockout data from B-14 and Be-14.
机译：使用不同反应，不同的射弹能量和不同的实验设置的几个实验研究了中子 - 未结合的同位素。然而，在解释数据中没有真正的共识，特别是关于低洼激发态的结构。收集可能揭示BE-13结构的新实验信息是挑战，特别是鉴于其在BE-12之间的桥接作用，其中n = 8个中子壳体突破，伯洛核核心为-14。本研究的目的是研究在B-14的质子敲除，通过测量源自脱离激发的BE-12，中子和γ射线的巧合之后，在B-14之间的反应产物BE-12中的结合激发态在反应产物BE-12中的作用由BE-13的中子衰减喂养。在撞击CH2靶标的400meV / Nucleon B-14梁中，在质子敲除，在质子敲除，从撞击CH2靶标的射线产生BE-13同位素。从BE-12（GS）和中子之间的重合中获得BE-12-N相对能谱D Sigma / de（Fn），也可以通过添加伽马射线来从激发态的去激发中加入三倍的重合在BE-12。从2.11MeV的BE-12中的前5/2（+）状态下的中子衰减从BE-12中的2（+）状态。从与35meV / NucleoN B-14光束拍摄的数据的比较，发现了质子敲除机制的能量独立性。通过将来自B-14的质子和中子敲除数据与BE-14比较来确认BE-13中的低位p波共振（1/2（ - ））。

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  • 来源
    《Physical review, C》 |2018年第2期|共9页
  • 作者

    Ribeiro G.; Nacher E.; Tengblad O.; Diaz Fernandez P.; Aksyutina Y.; Alvarez-Pol H.; Atar L.; Aumann T.; Avdeichikov V; Beceiro-Novo S.; Bemmerer D.; Benlliure J.; Bertulani C. A.; Boillos J. M.; Boretzky K.; Borge M. J. G.; Caamano M.; Caesar C.; Casarejos E.; Catford W.; Cederkall J.; Chartier M.; Chulkov L.; Cortina-Gil D.; Cravo E.; Crespo R.; Pramanik U. Datta; Dillmann I; Elekes Z.; Enders J.; Ershova O.; Estrade A.; Farinon F.; Fraile L. M.; Freer M.; Fynbo H. O. U.; Galaviz D.; Geissel H.; Gernhaeuser R.; Golubev P.; Goebel K.; Hagdahl J.; Heftrich T.; Heil M.; Heine M.; Heinz A.; Henriques A.; Holl M.; Hufnagel A.; Ignatov A.; Johansson H. T.; Jonson B.; Kalantar-Nayestanaki N.; Kanungo R.; Kelic-Heil A.; Kurz N.; Kroell T.; Labiche M.; Langer C.; Le Bleis T.; Lemmon R.; Lindberg S.; Machado J.; Marganiec J.; Movsesyan A.; Nilsson T.; Nociforo C.; Panin V; Paschalis S.; Perea A.; Petri M.; Pietri S.; Plag R.; Reifarth R.; Rigollet C.; Riisager K.; Rossi D.; Roeder M.; Savran D.; Scheit H.; Simon H.; Sorlin O.; Syndikus I; Taylor J. T.; Thies R.; Velho P.; Wagner A.; Wamers F.; Vandebrouck M.; Weick H.; Wheldon C.; Wilson G.; Wimmer C.; Winfield J. S.; Woods P.; Zhukov M. V; Zilges A.; Zuber K.;

  • 作者单位

    CSIC Inst Estruct Materia 113 Bis E-28006 Madrid Spain;

    CSIC Inst Estruct Materia 113 Bis E-28006 Madrid Spain;

    CSIC Inst Estruct Materia 113 Bis E-28006 Madrid Spain;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Univ Santiago de Compostela Dept Fis Particulas Santiago De Compostela 15706 Spain;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Lund Univ Dept Phys S-22100 Lund Sweden;

    Univ Santiago de Compostela Dept Fis Particulas Santiago De Compostela 15706 Spain;

    Helmholtz Zentrum Dresden Rossendorf D-01328 Dresden Germany;

    Univ Santiago de Compostela Dept Fis Particulas Santiago De Compostela 15706 Spain;

    Texas A&

    M Univ Commerce Dept Phys &

    Astron Commerce TX 75429 USA;

    Univ Santiago de Compostela Inst Galego Fis Altas Enerxias IGFAE Santiago De Compostela 15706 Spain;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    CSIC Inst Estruct Materia 113 Bis E-28006 Madrid Spain;

    Univ Santiago de Compostela Dept Fis Particulas Santiago De Compostela 15706 Spain;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Univ Vigo E-36310 Vigo Spain;

    Univ Surrey Dept Phys Guildford GU2 5FH Surrey England;

    Lund Univ Dept Phys S-22100 Lund Sweden;

    Univ Liverpool Oliver Lodge Lab Liverpool L69 7ZE Merseyside England;

    GSI Helmholtzzentrum Schwerionenforsch GmbH ExtreMe Matter Inst EMMI D-64291 Darmstadt Germany;

    Univ Santiago de Compostela Dept Fis Particulas Santiago De Compostela 15706 Spain;

    Inst Super Tecn Dept Fis Av Rovisco Pais 1 P-1049001 Lisbon Portugal;

    Inst Super Tecn Dept Fis Av Rovisco Pais 1 P-1049001 Lisbon Portugal;

    Saha Inst Nucl Phys 1-AF Bidhan Nagar Kolkata 700064 India;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Helmholtz Zentrum Dresden Rossendorf D-01328 Dresden Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Goethe Univ Frankfurt Main D-60438 Frankfurt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Univ Complutense Madrid Fac Ciencias Fis Avda Complutense E-28040 Madrid Spain;

    Univ Birmingham Sch Phys &

    Astron Birmingham B15 2TT W Midlands England;

    Aarhus Univ Dept Phys &

    Astron DK-8000 Aarhus C Denmark;

    Univ Lisbon Ctr Fis Nucl P-1649003 Lisbon Portugal;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Tech Univ Munich Phys Dept E12 D-85748 Garching Germany;

    Lund Univ Dept Phys S-22100 Lund Sweden;

    Goethe Univ Frankfurt Max von Laue Str 1 D-60438 Frankfurt Germany;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    Goethe Univ Frankfurt Main D-60438 Frankfurt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    Univ Lisbon Ctr Fis Nucl P-1649003 Lisbon Portugal;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    Univ Groningen KVI CART Zernikelaan 25 NL-9747 AA Groningen Netherlands;

    St Marys Univ Astron &

    Phys Dept Halifax NS B3H 3C3 Canada;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    STFC Daresbury Lab Warrington WA4 4AD Cheshire England;

    Goethe Univ Frankfurt Main D-60438 Frankfurt Germany;

    Tech Univ Munich Phys Dept E12 D-85748 Garching Germany;

    STFC Daresbury Lab Warrington WA4 4AD Cheshire England;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    Univ Lisbon Ctr Fis Nucl P-1649003 Lisbon Portugal;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    CSIC Inst Estruct Materia 113 Bis E-28006 Madrid Spain;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Goethe Univ Frankfurt Main D-60438 Frankfurt Germany;

    Goethe Univ Frankfurt Main D-60438 Frankfurt Germany;

    Univ Groningen KVI CART Zernikelaan 25 NL-9747 AA Groningen Netherlands;

    Aarhus Univ Dept Phys &

    Astron DK-8000 Aarhus C Denmark;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Helmholtz Zentrum Dresden Rossendorf Inst Radiat Phys POB 510119 D-01314 Dresden Germany;

    GSI Helmholtzzentrum Schwerionenforsch GmbH ExtreMe Matter Inst EMMI D-64291 Darmstadt Germany;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    CEA DSM CNRS IN2P3 GANIL BP 55027 F-14076 Caen 5 France;

    Tech Univ Darmstadt Inst Kernphys D-64289 Darmstadt Germany;

    Univ Liverpool Oliver Lodge Lab Liverpool L69 7ZE Merseyside England;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    Univ Lisbon Ctr Fis Nucl P-1649003 Lisbon Portugal;

    Helmholtz Zentrum Dresden Rossendorf D-01328 Dresden Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    GANIL Bd Henri Becquerel F-14076 Caen France;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Univ Birmingham Sch Phys &

    Astron Birmingham B15 2TT W Midlands England;

    Univ Surrey Dept Phys Guildford GU2 5XH Surrey England;

    Goethe Univ Frankfurt Main D-60438 Frankfurt Germany;

    GSI Helmholtzzentrum Schwerionenforsch D-64291 Darmstadt Germany;

    Univ Edinburgh Sch Phys &

    Astron Edinburgh EH9 3JZ Midlothian Scotland;

    Chalmers Tekniska Hogskola Inst Fys S-41296 Gothenburg Sweden;

    Univ Cologne Inst Kernphys D-50937 Cologne Germany;

    Tech Univ Inst Kern Teilchenphys D-01069 Dresden Germany;

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  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
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