Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 24: Struktur und Dynamik von Kernen V

HK 24.4: Vortrag

Dienstag, 16. März 2010, 17:30–17:45, HG II

One-nucleon knockout reactions with ⁵⁷Ni — •Alina Movsesyan — GSI, Planckstrasse 1, 64291 Darmstadt, Germany

One-nucleon knockout reactions in inverse kinematics have been developed as a standard tool to investigate the shell structure of short-lived nuclei. Typically, a light target like Be or C is used, and only the heavy projectile-like fragment is detected. In this presentation, we discuss a new, more exclusive experimental approach using proton-induced knockout reactions performed at the LAND-R³B facility at GSI. The scattered target proton and the knocked-out nucleon, as well as the heavy residue are detected. Results for the one-proton and one-neutron knockout reactions on the radioactive isotope ⁵⁷Ni will be discussed. Angular correlations of the scattered nucleons are observed in the (p,2p) and (p,pn) reactions. The corresponding momentum distributions of the fragments ⁵⁶Co and ⁵⁶Ni are reconstructed and corresponding cross sections are analyzed. The experimental setup is also capable to distinguish different reaction channels by observing the gamma decay of excited fragments. The results are compared to knockout reactions with a Be target and to theoretical estimates.

This work is supported by BMBF, the EU (EURONS) and EMMI.