Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Struktur und Dynamik von Kernen V
HK 23.7: Vortrag
Dienstag, 22. März 2011, 18:15–18:30, O-1
The total photo-absorption cross section of 6,7Li below π-threshold — •Maddalena Boselli1, Peter Grabmayr2, and Duncan Middleton3 — 1Università degli Studi di Trento, I-38100 Povo (Trento), Italy — 2Kepler Center for Astro and Particle Physics, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen — 3Institut für Kernphysik, Universität Mainz, J.J. Becher Weg 45, 55128, Mainz
The study of few body systems via electromagnetic probes provides a good test for theoretical calculations of nuclear structure. The Li nucleus is of particular interest as calculations exist for both the 6Li and 7Li isotopes with which experimental measurements can be compared. Here we report on a measurement of the total photo-absorption cross section for the 6,7Li isotopes below π-threshold.
The measurement was carried out at the MAX-Lab photon tagging facility in Lund, Sweden. An incident electron energy of 168 MeV was used to produce Brehmsstralung photons in the range range 15≤ Eγ≤120 MeV. Two 2 m long target bars of 6Li and 7Li were used to attenuate the incident photon beam. A BaF2 detector, placed behind a veto detector, was used in the beam line for detection of photons which traversed the target material.
The ongoing analysis from the measurement will be reported and cross sections presented. The data are compared to microscopic calculations of the cross section from the Trento group.