Speaker
Alina Movsesyan
(Technical University Darmstadt)
Description
In this presentation, an exclusive experimental approach for the investigation of the shell structure of exotic nuclei using proton-induced knockout reactions is discussed. The experiment performed at the LAND-R3B facility at GSI allowed for an analysis of (p,2p) as well as for the first time (p,pn) reactions in inverse kinematics from kinematically complete measurements of the incoming and outgoing channels. Hereby, results for one-proton and one-neutron knockout reactions on the radioactive isotope 57Ni will be discussed. The quasi-free-knockout character of the reactions was identified event-by-event by the reconstructed angular correlations of the scattered nucleons. Inclusive momentum distributions of the residual 56Co and 56Ni fragments and corresponding (p,2p) and (p,pn) reaction cross sections were deduced. The experimental setup is also capable to distinguish different reaction channels by observing the gamma decay of excited fragments. Particularly, an analysis of excited 56Ni residues was carried out, allowing the separation of different angular momentum states of the knocked-out neutron in the 57Ni ground state. The results will be compared to knockout reactions induced by a Be target and to theoretical estimates.
This work is supported by HIC for FAIR and EMMI.
Primary author
Alina Movsesyan
(Technical University Darmstadt)
Co-authors
Dr
Dominic Rossi
(GSI Helmholtz Center for Heavy Ion Research)
Ms
Olga Ershova
(Goethe Universitaet Frankfurt a.M.)
Dr
Stefanos Paschalis
(Technical University Darmstadt)
Prof.
Thomas Aumann
(Technical University Darmstadt)
