Observation Of A Low-lying Neutron-unbound State In C-19

Document Type

Article

Publication Date

8-21-2013

Publication Source

Nuclear Physics A

Volume Number

912

First Page

1

Last Page

6

Publisher

Elsevier

ISSN

0375-9474

Abstract

Proton removal reactions from a secondary N-22 beam were utilized to populate unbound states in neutronrich 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 C-18 + n corresponding to a state in C-19 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 In and 2n removal cross section measurements from C-20. (C) 2013 Elsevier B.V. All rights reserved.

Keywords

Nuclear Reactions Be-9(n-22, 3pn C-18), (n-22, 2p C-19), (n-22, Pn C-20), E=68 Mev/nucleon, Measured Carbon Fragments, E-n, E- I-n, (carbon)n-coin, C-19 Deduced 76 Kev Resonance, Low-lying Level Scheme Near Neutron Drip Line, Calculated Low-lying Levels, J, Pi Using Different Shell Models Keywords Plus: Excited-states, Mass, References, Isotopes, Graphs, Tables

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