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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 3: Electromagnetic and Hadronic Probes I

HK 3.7: Talk

Monday, March 8, 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,eNN) 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).

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