Ralf SCHULZE1 / Petra KUDEJOVA2 / Lea CANELLA2 / Martin EBERT3 / Thomas MATERNA4 / Jan JOLIE1 / Tamas BELGYA5 / László SZENTMIKLÓSI5 / Zoltan KIS5 / Enrico PERELLI CIPPO6 / Winfried KOCKELMANN7 / Erik SCHOONEVELD7 / Peter SCHILLEBEECKX8 / ANCIENT CHARM COLLABORATION
(1Institute for Nuclear Physics, University of Cologne, Germany / 2Technische Universität München, Garching, Germany / 3Research Center Julich, Germany / 4Institut Laue-Langevin, Grenoble, France / 5Institute of Isotopes, Hungarian Academy of Sciences, Budapest, Hungary / 6Dipartimento di Fisica ‘Giuseppe Occhialini’, Universita degli Studi di Milano-Bicocca, Milano, Italy / 7ISIS Neutron Spallation Source, Rutherford Appleton Laboratory, Chilton, Didcot, United Kingdom / 8EC-Joint Research Centre, Geel, Belgium)
Outline: the special message of the poster: The integration of several novel methods for non-destructive 3D elemental analysis of cultural heritage objects will be presented.
Several new element sensitive neutron-based imaging methods, like e.g. Prompt-Gamma Activation Imaging (PGAI), a method based on the detection of prompt-gamma radiation emitted during the irradiation with cold neutrons, and Neutron Resonance Transmission (NRT), based on the position sensitive detection of transmission spectra of epithermal neutrons, have been developed in the frame of the European ANCIENT CHARM Project. They were tested on replica test objects and on real objects of archaeological interest. Because these methods utilize neutrons of different energy ranges the acquired data-sets originate from different setups which do not share a common laboratory coordinate system. Therefore procedures and tools had to be developed to align these data-sets in space to be able to present the gained information contents in a consistent way.
The measurements were completed with the well-established cold Neutron Tomography (NT) method to obtain the inner morphological structure of the objects and to guide the positioning of the objects in the neutron beam.
The combination of data from the new imaging methods with NT gives complete 3D information of the structure and elemental composition of the samples. NT may be used to correct for cold neutron attenuation effects, to be able to get semi-quantitative results.
The tools and methods used for the alignment as well as the results obtained from the measurements will be presented.
Keywords: Prompt Gamma Activation Imaging /Ancient Charm / Cold Neutron Tomography / Data Registration