$\gamma$ ray spectroscopy of $^{19}$C via single neutron knock-out reaction

TL;DR

This study used gamma-ray spectroscopy to investigate the structure of $^{19}$C via a one-neutron knock-out reaction, identifying a key gamma transition and assigning it to a specific nuclear state.

Contribution

The paper reports the first observation of a gamma transition in $^{19}$C following a single neutron knock-out, providing new insights into its nuclear structure.

Findings

Detected a 198 keV gamma transition in $^{19}$C

Assigned the transition to the decay of the 3/2$_1^+$ state

Compared experimental cross sections with theoretical models

Abstract

The one neutron knock-out reaction $^1$H($^{20}$C,$^{19}$C$\gamma$) was studied at RIKEN using the DALI2 array. A $\gamma$ ray transition was observed at 198(10) keV. Based on the comparison between the experimental production cross section and theoretical predictions, the transition was assigned to the decay of the 3/2$_1^+$ state to the ground state.