Observation of a low-lying neutron-unbound state in 19C

M Thoennessen,N.S Badger,P.A Deyoung,J.K Smith,D.A Meyer,W.F Rogers,M Mosby,D Bazin,B Luther,S Mosby,J.E Finck,A Spyrou,T Baumann,M Bennett,M.J Strongman,E.A Hook,J Brown,M Gardner,G Christian

doi:10.1016/j.nuclphysa.2013.05.001

Observation of a low-lying neutron-unbound state in 19C

M Thoennessen, N.S Badger + Show 17 more

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https://doi.org/10.1016/j.nuclphysa.2013.05.001

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Journal: Nuclear physics. A	Publication Date: May 18, 2013
Citations: 7

Affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, Rhodes College, Westmont College, Concordia College - Minnesota, Central Michigan University, Wabash College

#Modular Neutron Array #Neutron-rich Carbon Isotopes + Show 8 more

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Abstract

Proton removal reactions from a secondary 22N beam were utilized to populate unbound states in neutron-rich carbon isotopes. Neutrons were measured with the Modular Neutron Array (MoNA) in coincidence with carbon fragments. A resonance with a decay energy of 76(14) keV was observed in the system 18C+n corresponding to a state in 19C at an excitation energy of 653(95)keV. This resonance could correspond to the first 5/2+ state which was recently speculated to be unbound in order to describe 1n and 2n removal cross section measurements from 20C.

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