Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Structure and Dynamics of Nuclei 10

HK 46.4: Talk

Wednesday, March 25, 2015, 15:15–15:30, T/SR14

Single-particle structure of exotic beryllium isotopes studied in quasi-free (p,pn)-reactions — •Julian Kahlbow¹, Thomas Aumann¹, Christoph Caesar², and Heiko Scheit¹ for the R3B collaboration — ¹IKP, TU Darmstadt, Germany — ²GSI, Darmstadt, Germany

The neutron-rich beryllium isotopes have been studied in inverse kinematics at the R³B-LAND setup at GSI. The high neutron-proton asymmetry leads to the breakdown of the N=8 shell-closure in ¹²Be. The ¹²Be ground-state configuration is composed of s-,p- and d-wave for the valence-neutron pair.

Proton-induced quasi-free neutron-knockout reactions at relativistic energies are used to investigate these single-particle properties in a kinematically complete measurement. The ¹¹Be-halo fragment is either populated in the ground-state, in a low-lying excited or an unbound state that is identified. Finally, partial cross sections are extracted.

This work is supported by HIC for FAIR, GSI-TU Darmstadt cooperation, and the BMBF project 05P12RDFN8.