title: First observation of ground state dineutron decay: 16Be.
abstract: We report on the first observation of dineutron emission in the decay of 16Be. A single-proton knockout reaction from a 53  MeV/u 17B beam was used to populate the ground state of 16Be. 16Be is bound with respect to the emission of one neutron and unbound to two-neutron emission. The dineutron character of the decay is evidenced by a small emission angle between the two neutrons. The two-neutron separation energy of 16Be was measured to be 1.35(10) MeV, in good agreement with shell model calculations, using standard interactions for this mass region.
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA. spyrou@nscl.msu.edu
authors.forename: A
authors.initials: A
authors.lastname: Spyrou
authors.forename: Z
authors.initials: Z
authors.lastname: Kohley
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authors.lastname: Baumann
authors.forename: D
authors.initials: D
authors.lastname: Bazin
authors.forename: B A
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authors.lastname: Brown
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authors.lastname: Christian
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authors.lastname: DeYoung
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authors.lastname: Finck
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authors.lastname: Frank
authors.forename: E
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authors.lastname: Lunderberg
authors.forename: S
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authors.lastname: Mosby
authors.forename: W A
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authors.lastname: Peters
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authors.lastname: Schiller
authors.forename: J K
authors.initials: JK
authors.lastname: Smith
authors.forename: J
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authors.lastname: Snyder
authors.forename: M J
authors.initials: MJ
authors.lastname: Strongman
authors.forename: M
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authors.lastname: Thoennessen
authors.forename: A
authors.initials: A
authors.lastname: Volya