Abstract

The two-neutron unbound systems of 16Be, 13Li, 10He, and 26O have been measured using the Modular Neutron Array (MoNA) and 4 Tm Sweeper magnet setup. The correlations of the 3-body decay for the 6Be and 3Li were extracted and demonstrated a strong correlated enhancement between the two neutrons. The measurement of the 10He ground state resonance from a 14Be(-2p2n) reaction provided insight into previous predictions that wavefunction of the entrance channel, projectile, can influence the observed decay energy spectrum for the unbound system. Lastly, the decay-in-target (DiT) technique was utilized to extract the lifetime of the 26O ground state. The measured lifetime of 4.5+1.1−1.5(stat.)±3(sys.) ps provides the first indication of two-neutron radioactivity.

Details

Title
Structure and decay correlations of two-neutron systems beyond the dripline
Author
Kohley, Z 1 ; Baumann, T 2 ; Bazin, D 2 ; Christian, G 3 ; De Young, P A 4 ; Finck, J E 5 ; Haring-Kaye, R A 6 ; Hinnefeld, J 7 ; Frank, N 8 ; Lunderberg, E 4 ; Luther, B 9 ; Mosby, S 3 ; Peters, W A 3 ; Smith, J K 3 ; Snyder, J 3 ; Stephenson, S L 10 ; Strongman, M J 3 ; Spyrou, A 3 ; Thoennessen, M 3 ; Volya, A 11 

 National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA; Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA 
 National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA 
 National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA; Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA 
 Department of Physics, Hope College, Holland, Michigan 49423, USA 
 Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA 
 Department of Physics and Astronomy, Ohio Wesleyan University, Delaware, Ohio 43015, USA 
 Department of Physics and Astronomy, Indiana University at South Bend, South Bend, Indiana 46634, USA 
 Department of Physics & Astronomy, Augustana College, Rock Island, Illinois 61201, USA 
 Department of Physics, Concordia College, Moorhead, Minnesota 56562, USA 
10  Department of Physics, Gettysburg College, Gettysburg, Pennsylvania 17325, USA 
11  Department of Physics, Florida State University, Tallahasee, Florida 32306, USA 
Publication year
2014
Publication date
Dec 2014
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2576808841
Copyright
© 2014. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.