Study of the 14Be Continuum: Identification and Structure of its Second 2+ State

被引：17

作者：

Aksyutina, Yu. ^{[1
]}

Aumann, T. ^{[1
,2
]}

Boretzky, K. ^{[1
]}

Borge, M. J. G. ^{[3
]}

Caesar, C. ^{[1
,2
]}

Chatillon, A. ^{[1
]}

Chulkov, L. V. ^{[1
,4
]}

Cortina-Gil, D. ^{[5
]}

Pramanik, U. Datta ^{[6
]}

Emling, H. ^{[1
]}

Fynbo, H. O. U. ^{[7
]}

Geissel, H. ^{[1
]}

Heinz, A. ^{[8
]}

Ickert, G. ^{[1
]}

Johansson, H. T. ^{[8
]}

Jonson, B. ^{[8
]}

Kulessa, R. ^{[9
]}

Langer, C. ^{[1
]}

LeBleis, T. ^{[1
]}

Mahata, K. ^{[1
]}

Muenzenberg, G. ^{[1
]}

Nilsson, T. ^{[8
]}

Nyman, G. ^{[8
]}

Palit, R.

Paschalis, S. ^{[2
]}

Prokopowicz, W. ^{[1
]}

Reifarth, R. ^{[1
,10
]}

Rossi, D. ^{[1
]}

Richter, A. ^{[2
]}

Riisager, K. ^{[7
]}

Schrieder, G. ^{[2
]}

Simon, H. ^{[1
]}

Suemmerer, K. ^{[1
]}

Tengblad, O. ^{[3
]}

Thies, R. ^{[8
]}

Weick, H. ^{[1
]}

Zhukov, M. V. ^{[8
]}

机构：

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

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

[3] CSIC, Inst Estruct Mat, ES-28006 Madrid, Spain

[4] Kurchatov Inst, RU-123182 Moscow, Russia

[5] Univ Santiago de Compostela, ES-15782 Santiago De Compostela, Spain

[6] Saha Inst Nucl Phys, IN-700064 Kolkata, India

[7] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus, Denmark

[8] Chalmers Tekniska Hogskola, SE-41296 Gothenburg, Sweden

[9] Uniwersytet Jagellonski, Inst Fis, PL-30059 Krakow, Poland

[10] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 24期

基金：

瑞典研究理事会;

关键词：

HALO STRUCTURE; NUCLEI; BE-12; BE-14; SCATTERING; MODEL;

D O I：

10.1103/PhysRevLett.111.242501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The coupling between bound quantum states and those in the continuum is of high theoretical interest. Experimental studies of bound drip-line nuclei provide ideal testing grounds for such investigations since they, due to the feeble binding energy of their valence particles, are easy to excite into the continuum. In this Letter, continuum states in the heaviest particle-stable Be isotope, Be-14, are studied by employing the method of inelastic proton scattering in inverse kinematics. New continuum states are found at excitation energies E* = 3.54(16) MeV and E* = 5.25(19) MeV. The structure of the earlier known 2(1)(+) state at 1.54(13) MeV was confirmed with a predominantly (0d(5/2))(2) configuration while there is very clear evidence that the 2(2)(+) state has a predominant (1s(1/2), 0d(5/2)) structure with a preferential three-body decay mechanism. The region at about 7 MeV excitation shows distinct features of sequential neutron decay via intermediate states in Be-13. This demonstrates that the increasing availability of energetic beams of exotic nuclei opens up new vistas for experiments leading towards a new understanding of the interplay between bound and continuum states.

引用

页数：5

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