Anna Gueli | Istituto Nazionale di Fisica Nucleare (original) (raw)
Papers by Anna Gueli
This work will present preliminary results concerning the use of time-resolved ion beam induced l... more This work will present preliminary results concerning the use of time-resolved ion beam induced luminescence applied to provenance studies of lapis lazuli. Measurements were performed at the pulsed beam facility at LABEC laboratory in Florence. Lapis lazuli is a semi-precious gemstone, used as ornament since the early civilizations that can be found in few places on Earth. The importance of this work lies in understanding the origin of various samples of lapis lazuli, from which it may be possible to gain insight into trade routes from ancient times. The samples studied in this work originated from Chile, Afghanistan, Tajikistan, Myanmar, and Siberia. The stones were irradiated with 3 MeV protons and the resulting luminescence was detected by a photomultiplier tube, whose output was acquired using a sampling digitizer VME module (CAEN/V1720). Wavelength discrimination was performed at 430 nm utilizing a range of beam currents. The results showed that, by changing the beam current intensity, one can study different features of lapis lazuli, and this may aid in distinguishing lapis lazuli from different provenances.
Proceedings of the 37th International Symposium on Archaeometry, 13th - 16th May 2008, Siena, Italy, 2010
Communications to SIMAI Congress, Dec 8, 2009
In this paper, an algorithm to automatically recognize pigments from Raman spectrum analysis is p... more In this paper, an algorithm to automatically recognize pigments from Raman spectrum analysis is presented. The Raman spectroscopy is a technique to confirm the presence of specific pigments in a painting. Machine learning techniques are applied over an existing database of Raman spectra in order to find a set of characteristic features. These information are necessary to automatically recognize unknown pigments by using ad-hoc
Radiation Measurements, 2009
An experimental intercomparison was performed with brick samples from an early medieval building ... more An experimental intercomparison was performed with brick samples from an early medieval building in the west of France, the St-Philbert-de-Grandlieu abbey. A potentially complex set of microdosimetric problems emerged from characterisation measurements, providing a robust test of the routine procedures used by each laboratory. The dating results obtained using quartz coarse grains and fine grain samples span over a large
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2014
ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regional... more ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regionale di Palazzo Bellomo and excavated in Siracusa, were studied through non-invasive ion beam techniques in the Centre de Recherche et de Restauration des Musees de France in Paris. Up to now only aesthetic and stylistic analysis were available for these objects, and their provenances and dating were unknown or uncertain; moreover, the question concerning a possible local production was still debated. Compositions of pottery and glazed parts were thus obtained by Particle Induced X-ray Emission analysis, while the depth distribution of element of the lustre was analyzed by the Rutherford Backscattering Spectrometry technique. The obtained results provided important information on possible origin and production period of the objects.
L’archéologie des bâtiments en question. Un outil pour les connaître, les conserver et les restaurer, 2014
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2014
ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regional... more ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regionale di Palazzo Bellomo and excavated in Siracusa, were studied through non-invasive ion beam techniques in the Centre de Recherche et de Restauration des Musees de France in Paris. Up to now only aesthetic and stylistic analysis were available for these objects, and their provenances and dating were unknown or uncertain; moreover, the question concerning a possible local production was still debated. Compositions of pottery and glazed parts were thus obtained by Particle Induced X-ray Emission analysis, while the depth distribution of element of the lustre was analyzed by the Rutherford Backscattering Spectrometry technique. The obtained results provided important information on possible origin and production period of the objects.
Located in the historical center of Catania, in the Civita district, the Bonajuto chapel is one o... more Located in the historical center of Catania, in the Civita district, the Bonajuto chapel is one of the oldest and best conserved buildings of the city, which has survived the numerous earthquakes that have struck eastern Sicily during the medieval and the modern age, such as those particularly devastating ones in 1169 and 1693.
However, the date of this small monument, together with its original use, still remain uncertain, as literary and documentary evidence are scarce and fragmentary. Most historians, analyzing prevalently the stylistic and constructive aspects, interpreted the chapel as a place of worship and assigned its construction to a rather long period of the early Middle Ages, from the 5th-6th to the 8th-9th centuries AD, i.e. to the phase in which the island was under the Byzantine domination. The excavations carried out in 1930-39 and the last restoration works (2003) have not provided explicit chronological data. Its age determination is considered essential for a better knowledge of the real influence of this domination on the architecture of the Island.
Therefore, a multidisciplinary and accurate analysis of the building using the existing bibliography has been carried out also in order to understand the functional and morphological transformations of the chapel during its long life. The thermoluminescence (TL) absolute dating methodology applied to some brickwork elements of the construction, has placed the monument chronology in a period of time that is notably shorter than that above mentioned. These new data, together with the study of the architectural structure, have made a significant step forward in the knowledge of the chapel history.
Quaternary International, 2006
Within the colluvial clastic deposits of the Crati Basin, near the village of Tarsia, a decimetre... more Within the colluvial clastic deposits of the Crati Basin, near the village of Tarsia, a decimetre to metre thick volcaniclastic stratum outcrops interbedded within poorly structured sandy-pelitic deposits. The volcaniclastic stratum is structureless, powdery, pinkish grey or yellowish brown, slightly pedogenized towards the top and characterized at the base by centimetre-sized clasts of crystalline rocks. The depositional and textural features suggest a primary fall-out of volcanic ash during a period when the climate-favoured modification of the landscape and re-mobilization of the ash as mud flows with the first rainy episode. This area was subjected to strong uplift (0.7 mm/yr) and climatic effects of the Last Glacial Maximum, and the preservation of this volcaniclastic stratum represents an unusual and exceptional event.
Quaternary International, 2011
Quaternary terrace deposits exposed on the Capo Vaticano peninsula (Calabria, Southern Italy) hav... more Quaternary terrace deposits exposed on the Capo Vaticano peninsula (Calabria, Southern Italy) have been investigated in order to obtain new OSL age estimates. Six samples were collected from unconsolidated sediments associated with the major marine terraces. These form a flight of seven distinct levels distributed between about 600 m and 30 m of altitude. The samples were analysed by optically stimulated luminescence (OSL) technique, the obtained results provided reliable age estimates showing numerical ages ranging between 214 AE 25 ka and 62 AE 6 ka. Age determinations combined with geological and morphological information provide new constraints for correlating the distinct orders of marine terraces with the last seven interglacial stages of the eustatic curve. This correlation indicates that in the Middle-Late Pleistocene this portion of the southern Calabrian arc was affected by a vigorous uplift characterized by rates up to w2 mm/y.
The application of Thermally (TL) and Optically (OSL) Stimulated Luminescence on bricks used as b... more The application of Thermally (TL) and Optically (OSL) Stimulated Luminescence on bricks used as building material has allowed solving an chronological issue in the field of historical building dating. The possibility to use one or more methodologies of dating is closely related to the luminescent and granulometric characteristics of the sample. Using some brick samples collected in the church of Sain Seurin in Bordeaux (France), this paper discusses the implications and the possibility to use different approaches and techniques for dating. With this aim luminescence measurements were performed on both polymineral fine grain and quartz inclusion phases extracted from each brick. For Equivalent Dose (ED) and consequently age determination, TL on mixed fine grain fraction (FG), OSL on quartz inclusions (QI) and on mixed fine grain (FG*) fraction, were used. The results obtained suggest the advantage of using OSL technique on fine grain fraction cleaned up by IR stimulation (FG*), but the use of quartz inclusion represents indeed a good alternative.
This work will present preliminary results concerning the use of time-resolved ion beam induced l... more This work will present preliminary results concerning the use of time-resolved ion beam induced luminescence applied to provenance studies of lapis lazuli. Measurements were performed at the pulsed beam facility at LABEC laboratory in Florence. Lapis lazuli is a semi-precious gemstone, used as ornament since the early civilizations that can be found in few places on Earth. The importance of this work lies in understanding the origin of various samples of lapis lazuli, from which it may be possible to gain insight into trade routes from ancient times. The samples studied in this work originated from Chile, Afghanistan, Tajikistan, Myanmar, and Siberia. The stones were irradiated with 3 MeV protons and the resulting luminescence was detected by a photomultiplier tube, whose output was acquired using a sampling digitizer VME module (CAEN/V1720). Wavelength discrimination was performed at 430 nm utilizing a range of beam currents. The results showed that, by changing the beam current intensity, one can study different features of lapis lazuli, and this may aid in distinguishing lapis lazuli from different provenances.
Proceedings of the 37th International Symposium on Archaeometry, 13th - 16th May 2008, Siena, Italy, 2010
Communications to SIMAI Congress, Dec 8, 2009
In this paper, an algorithm to automatically recognize pigments from Raman spectrum analysis is p... more In this paper, an algorithm to automatically recognize pigments from Raman spectrum analysis is presented. The Raman spectroscopy is a technique to confirm the presence of specific pigments in a painting. Machine learning techniques are applied over an existing database of Raman spectra in order to find a set of characteristic features. These information are necessary to automatically recognize unknown pigments by using ad-hoc
Radiation Measurements, 2009
An experimental intercomparison was performed with brick samples from an early medieval building ... more An experimental intercomparison was performed with brick samples from an early medieval building in the west of France, the St-Philbert-de-Grandlieu abbey. A potentially complex set of microdosimetric problems emerged from characterisation measurements, providing a robust test of the routine procedures used by each laboratory. The dating results obtained using quartz coarse grains and fine grain samples span over a large
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2014
ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regional... more ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regionale di Palazzo Bellomo and excavated in Siracusa, were studied through non-invasive ion beam techniques in the Centre de Recherche et de Restauration des Musees de France in Paris. Up to now only aesthetic and stylistic analysis were available for these objects, and their provenances and dating were unknown or uncertain; moreover, the question concerning a possible local production was still debated. Compositions of pottery and glazed parts were thus obtained by Particle Induced X-ray Emission analysis, while the depth distribution of element of the lustre was analyzed by the Rutherford Backscattering Spectrometry technique. The obtained results provided important information on possible origin and production period of the objects.
L’archéologie des bâtiments en question. Un outil pour les connaître, les conserver et les restaurer, 2014
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2014
ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regional... more ABSTRACT Several fragments of lustred pottery coming from the collection of the Galleria Regionale di Palazzo Bellomo and excavated in Siracusa, were studied through non-invasive ion beam techniques in the Centre de Recherche et de Restauration des Musees de France in Paris. Up to now only aesthetic and stylistic analysis were available for these objects, and their provenances and dating were unknown or uncertain; moreover, the question concerning a possible local production was still debated. Compositions of pottery and glazed parts were thus obtained by Particle Induced X-ray Emission analysis, while the depth distribution of element of the lustre was analyzed by the Rutherford Backscattering Spectrometry technique. The obtained results provided important information on possible origin and production period of the objects.
Located in the historical center of Catania, in the Civita district, the Bonajuto chapel is one o... more Located in the historical center of Catania, in the Civita district, the Bonajuto chapel is one of the oldest and best conserved buildings of the city, which has survived the numerous earthquakes that have struck eastern Sicily during the medieval and the modern age, such as those particularly devastating ones in 1169 and 1693.
However, the date of this small monument, together with its original use, still remain uncertain, as literary and documentary evidence are scarce and fragmentary. Most historians, analyzing prevalently the stylistic and constructive aspects, interpreted the chapel as a place of worship and assigned its construction to a rather long period of the early Middle Ages, from the 5th-6th to the 8th-9th centuries AD, i.e. to the phase in which the island was under the Byzantine domination. The excavations carried out in 1930-39 and the last restoration works (2003) have not provided explicit chronological data. Its age determination is considered essential for a better knowledge of the real influence of this domination on the architecture of the Island.
Therefore, a multidisciplinary and accurate analysis of the building using the existing bibliography has been carried out also in order to understand the functional and morphological transformations of the chapel during its long life. The thermoluminescence (TL) absolute dating methodology applied to some brickwork elements of the construction, has placed the monument chronology in a period of time that is notably shorter than that above mentioned. These new data, together with the study of the architectural structure, have made a significant step forward in the knowledge of the chapel history.
Quaternary International, 2006
Within the colluvial clastic deposits of the Crati Basin, near the village of Tarsia, a decimetre... more Within the colluvial clastic deposits of the Crati Basin, near the village of Tarsia, a decimetre to metre thick volcaniclastic stratum outcrops interbedded within poorly structured sandy-pelitic deposits. The volcaniclastic stratum is structureless, powdery, pinkish grey or yellowish brown, slightly pedogenized towards the top and characterized at the base by centimetre-sized clasts of crystalline rocks. The depositional and textural features suggest a primary fall-out of volcanic ash during a period when the climate-favoured modification of the landscape and re-mobilization of the ash as mud flows with the first rainy episode. This area was subjected to strong uplift (0.7 mm/yr) and climatic effects of the Last Glacial Maximum, and the preservation of this volcaniclastic stratum represents an unusual and exceptional event.
Quaternary International, 2011
Quaternary terrace deposits exposed on the Capo Vaticano peninsula (Calabria, Southern Italy) hav... more Quaternary terrace deposits exposed on the Capo Vaticano peninsula (Calabria, Southern Italy) have been investigated in order to obtain new OSL age estimates. Six samples were collected from unconsolidated sediments associated with the major marine terraces. These form a flight of seven distinct levels distributed between about 600 m and 30 m of altitude. The samples were analysed by optically stimulated luminescence (OSL) technique, the obtained results provided reliable age estimates showing numerical ages ranging between 214 AE 25 ka and 62 AE 6 ka. Age determinations combined with geological and morphological information provide new constraints for correlating the distinct orders of marine terraces with the last seven interglacial stages of the eustatic curve. This correlation indicates that in the Middle-Late Pleistocene this portion of the southern Calabrian arc was affected by a vigorous uplift characterized by rates up to w2 mm/y.
The application of Thermally (TL) and Optically (OSL) Stimulated Luminescence on bricks used as b... more The application of Thermally (TL) and Optically (OSL) Stimulated Luminescence on bricks used as building material has allowed solving an chronological issue in the field of historical building dating. The possibility to use one or more methodologies of dating is closely related to the luminescent and granulometric characteristics of the sample. Using some brick samples collected in the church of Sain Seurin in Bordeaux (France), this paper discusses the implications and the possibility to use different approaches and techniques for dating. With this aim luminescence measurements were performed on both polymineral fine grain and quartz inclusion phases extracted from each brick. For Equivalent Dose (ED) and consequently age determination, TL on mixed fine grain fraction (FG), OSL on quartz inclusions (QI) and on mixed fine grain (FG*) fraction, were used. The results obtained suggest the advantage of using OSL technique on fine grain fraction cleaned up by IR stimulation (FG*), but the use of quartz inclusion represents indeed a good alternative.