Abstract
The ability of a cluster of three segmented Ge crystals (“AGATA module”) acting as a Compton polarimeter to measure the linear polarization of gamma rays has been investigated at an energy close to 511 keV. Partially polarized gamma rays have been produced by Coulomb excitation of the first excited state of 104 Pd a and 108 Pd.
Highlights
New generation of large detector arrays of highly segmented germanium crystals are under construction in Europe [1] (AGATA) and US [2] (GRETA) for γ spectroscopy
We have investigated the capability of individual AGATA modules, composed of three segmented Ge counters, to measure the linear polarisation of γ–rays of energy close to 511 keV through the azimuthal distribution of their first Compton scattering
For our specific case of photons emitted by Coulomb excited nuclei, these parameters are referred to the plane of a reference system having the z axis along the gamma momentum and the x axis in the plane defined by the beam direction and the gamma momentum
Summary
New generation of large detector arrays of highly segmented germanium crystals are under construction in Europe [1] (AGATA) and US [2] (GRETA) for γ spectroscopy. We have investigated the capability of individual AGATA modules, composed of three segmented Ge counters, to measure the linear polarisation of γ–rays of energy close to 511 keV through the azimuthal distribution of their first Compton scattering.
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