Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 3: Electromagnetic and Hadronic Probes I
HK 3.7: Vortrag
Montag, 8. März 2004, 18:00–18:15, B
High Resolution (γ,NN)-Experiments on 16O — •I. Martin, P. Grabmayr, T. Hehl, J. Heim, and F. Moschini — Physikalisches Institut der Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen
Photoinduced two-nucleon knockout experiments are a promising tool for the
investigation of correlated nucleon pairs in nuclei. The present
experiments
focus on the improvement of energy resolution for the final states in
order
to increase the sensitivity when comparing with model calculations. Due
to
the large level spacing of the residual A=14 nuclei and the availability
of
complementary (e,e′NN) data, 16O is a preferred target.
Thus, the reactions
16O(γ,np)14N and
16O(γ,pp)14C
were investigated at the tagged photon facility of the electron accelerator
MAMI, Mainz.
In these measurements, the new HPGe array Ge6 from
Edinburgh was used in coincidence with the Tübingen time-of-flight
neutron spectrometer TOF for the first time.
To improve the energy resolution of the tagged photon beam,
a microscope in the focal plane of the Glasgow tagger was employed.
A report on the experiment and the ongoing data analysis is given,
and first missing-energy spectra are presented.
This work is supported by the DFG (GRK 683 Basel-Tübingen and SPP
1034).