Study of 19C using single-neutron knockout

7 Jun 2018, 09:36
18m
Kunibiki Messe (Matsue)

Kunibiki Messe

Matsue

Oral contribution Session 11

Speaker

Dr Jongwon Hwang (Center for Nuclear Study, University of Tokyo)

Description

The evolution of shell structure toward the driplines is a subject of importance in nuclear physics. For a half decade the p-sd-shell nuclei have been a useful tool for expanding our understanding of shell evolution. 19C is one of those nuclei, well known as the s-wave halo ground state. While the low-lying excited states with 3/2+ and 5/2+ were identified by experimental studies, there exists an argument of bound nature of 5/2+1. From a theoretical point of view, shell model calculations with different interactions show discrepancy in location and ordering of levels.

We investigated the neutron-unbound states of 19C using the one-neutron knockout reaction with SAMURAI spectrometer at RIBF, RIKEN. The 20C beam impinged on a carbon target to produce 19C. The decay products, 18C and a neutron, were detected using SAMURAI and NEBULA neutron array.

In this talk, the observation of populated states and the discussion in the context of shell-model calculations will be reported.

Primary author

Dr Jongwon Hwang (Center for Nuclear Study, University of Tokyo)

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