First observation of the 13Li ground state

被引:37
|
作者
Kohley, Z. [1 ]
Lunderberg, E. [2 ]
DeYoung, P. A. [2 ]
Volya, A. [3 ]
Baumann, T. [1 ]
Bazin, D. [1 ]
Christian, G. [1 ,4 ]
Cooper, N. L. [5 ]
Frank, N. [6 ]
Gade, A. [1 ,4 ]
Hall, C. [2 ]
Hinnefeld, J. [5 ]
Luther, B. [7 ]
Mosby, S. [1 ,4 ]
Peters, W. A. [1 ,4 ]
Smith, J. K. [1 ,4 ]
Snyder, J. [1 ,4 ]
Spyrou, A. [1 ,4 ]
Thoennessen, M. [1 ,4 ]
机构
[1] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA
[2] Hope Coll, Dept Phys, Holland, MI 49422 USA
[3] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA
[4] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[5] Indiana Univ, Dept Phys & Astron, South Bend, IN 46634 USA
[6] Augustana Coll, Dept Phys & Astron, Rock Isl, IL 61201 USA
[7] Concordia Coll, Dept Phys, Moorhead, MN 56562 USA
来源
PHYSICAL REVIEW C | 2013年 / 87卷 / 01期
基金
美国国家科学基金会;
关键词
ISOTOPES; NUCLEI; HALO;
D O I
10.1103/PhysRevC.87.011304
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
The ground state of neutron-rich unbound Li-13 was observed for the first time in a one-proton removal reaction from Be-14 at a beam energy of 53.6 MeV/u. The Li-13 ground state was reconstructed from Li-11 and two neutrons giving a resonance energy of 120(-80)(+60) keV. All events involving single-and double-neutron interactions in the Modular Neutron Array (MoNA) were analyzed, simulated, and fitted self-consistently. The three-body (Li-11 + n + n) correlations within Jacobi coordinates showed strong dineutron characteristics. The decay energy spectrum of the intermediate Li-12 system (Li-11 + n) was described with an s-wave scattering length of greater than -4 fm, which is a smaller absolute value than reported in a previous measurement. DOI: 10.1103/PhysRevC.87.011304
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页数:5
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