Study of 10be excited states using single-neutron pickup reactions on 11be.

On behalf of the (PCB)² and TIGRESS collaborations. One-neutron transfer reactions are used to study single-particle neutron states in nuclei. In this work, we use two pickup reactions on one-neutron halo nucleus ¹¹Be to study ¹⁰Be excited states, including the 2^- state at 6.26 MeV, which has been suggested to be an excited halo state. Both experiments were performed at the TRIUMF-ISAC II facility using the Printed Circuit Board Based Charged Particle ((PCB)²) array inside the TRIUMF ISAC Gamma-Ray Escape-Suppressed Spectrometer (TIGRESS). The first experiment used the (p,d) reaction in inverse kinematics at 10MeV per nucleon and the identification of the ¹⁰Be states was obtained by detecting the deuteron and, as needed, gamma-rays in coincidence. The second experiment used a ⁹Be target to produce two ¹⁰Be outgoing nuclei (quasi-projectile / quasi-target) allowing for multiple methods to identify the ¹⁰Be states. We will show results from the two experiments.