Search For C-21 And Constraints On C-22

Document Type

Article

Publication Date

7-2013

Publication Source

Nuclear Physics A

Volume Number

909

First Page

69

Last Page

78

Publisher

Elsevier Science BV

ISSN

0375-9474

Abstract

A search for the neutron-unbound nucleus 21C was performed via the single-proton removal reaction from a beam of 22N at 68 MeV/u. Neutrons were detected with the Modular Neutron Array (MoNA) in coincidence with 20C fragments. No evidence for a low-lying state was found, and the reconstructed decay-energy spectrum could be described with an s-wave line shape with a scattering length limit of |as|22C is bound by less than 70 keV.

Keywords

Nuclear reactions, View the MathML source, E=68 MeV/nucleon; measured, En, In(θ), E(20C fragment), I(20C fragment, θ); 21, 22C calculated, double neutron halo nucleus low-lying levels, J, π, spectrometric factor using shell model, Goldhaber model with friction term; 21C deduced, non-existence of bound state; View the MathML source deduced, scattering length

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