Roxana Bugoi

Roxana Bugoi
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering | IFIN HH · Department of Applied Nuclear Physics (DFNA)

PhD

About

73
Publications
20,456
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626
Citations
Citations since 2017
16 Research Items
261 Citations
201720182019202020212022202301020304050
201720182019202020212022202301020304050
201720182019202020212022202301020304050
201720182019202020212022202301020304050
Additional affiliations
October 1994 - present
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering
Position
  • Senior Researcher

Publications

Publications (73)
Article
Full-text available
The current paper aims to reveal the potential of combining multiple approaches (techno-functional analysis, experimental archaeology, and X-ray Computed Tomography) when it comes to studying unique earthenware artefacts, such as the prehistoric human-shaped pot discovered within the tell settlement from Sultana-Malu Rosu (Romania), that belongs to...
Article
This paper reports the results of Prompt Gamma Activation Analysis (PGAA) analyses on 21 glass fragments discovered at Tropaeum Traiani, Carsium, Ulmetum, and Altinum, Constanţa County, Romania, dated to the 1st-6th c. AD. The chemical data indicate a broad palette of compositions: Sb-colorless, Mn-colorless, Sb-Mn colorless, typical blue-green Rom...
Article
Full-text available
The chemical composition of 48 glass finds from Histria and Tomis, Romania, chiefly dated to the 1st–4th c. AD, was determined using prompt gamma activation analysis (PGAA) at the Budapest Neutron Centre (BNC). Most fragments have composition typical for the Roman naturally colored blue-green-yellow (RNCBGY) glass; Mn-colorless, Sb-colorless, and S...
Article
This paper reports the chemical composition of 36 glass finds from Histria, Romania, mainly dated to the Late Antique period (4th‐6th c. AD) obtained by Prompt Gamma Activation Analysis (PGAA) at the Budapest Neutron Centre (BNC). Histria glass fragments were identified as Série 2.1, Série 3.2 and Série 3.3 of Foy, HIMT, Roman and Sb‐decolorized. M...
Article
Full-text available
This paper reports the compositional characterization of eighty-two glass fragments discovered in archaeological contexts at Tropaeum Traiani (Adamclisi, Constanţa county, Romania), most of them dated to the 4th–6th centuries AD, in an attempt to understand the glass consumption and circulation in the Lower Danube region during the Late Antique per...
Article
This paper reports the PIXE-PIGE data obtained at AGLAE accelerator on 135 glass beads discovered at Sărata Monteoru and Bratei, Romania, dated to 6th-7th centuries AD. The stylistically similar glass beads were excavated in two cemeteries situated 300 km apart, attributed to different populations. The Sărata Monteoru beads were found in incinerati...
Article
Full-text available
Local production or import? This question always raises vivid debates among the archaeologists when they analyse pots and ceramic fragments regardless of the studied period. In the case of pottery from the Eneolithic tell settlement of Sultana-Malu Roşu from South-East Romania, we tried to address this issue through a series of physico-chemical inv...
Article
Forty five ceramic shards discovered in archaeological excavations at Castellum 22 site, Constanţa County, southeastern Romania, and dated to the 10th–11th centuries AD, were subjected to scientific investigations in order to get clues about the raw materials and manufacturing techniques employed by the potters from the Lower Danube zone at the end...
Article
Full-text available
In this paper we analyzed a batch of 64 clay weights from three archaeological sites located in Romania (Gumelniţa, Măgura-Jilava, and Sultana) that belong to Kodjadermen-Gumelniţa-Karanovo VI cultural complex (4600-3900 cal. BC). Our approach includes an interdisciplinary investigation based on technological analysis, experimental archaeology , an...
Article
Full-text available
Abstract Archaeometric investigations using OM (optical microscopy) and micro-PIXE (particle induced X-ray emission) were performed on 45 ceramic shards unearthed in archaeological excavations at Păcuiul lui Soare (southeastern Romania) and dated to the eleventh century AD. This study aimed to get clues about the raw materials and manufacturing tec...
Article
Full-text available
This paper reports the use of experimental archaeology and imaging methods—X-ray computed tomography (CT) and radiography—that were employed to decipher the manufacturing techniques of Eneolithic clay artefacts. This study was triggered by the archaeological research conducted in some tell settlements in Southeastern Romania that belong to the Kodj...
Article
Full-text available
This paper reports and discusses the chemical composition of 20 glass fragments discovered during the 2012 archeological survey at Troesmis (Turcoaia, Tulcea county, Romania) and dated to the Roman and the Byzantine/Early Medieval periods. The data were obtained by two external Ion beam analysis (IBA) methods—namely Particle-induced X-ray emission...
Article
Full-text available
This paper is about the use of X-ray Computed Tomography (CT) employed to investigate the manufacturing techniques of Eneolithic clay artefacts and pottery. This study was triggered by the archaeological research conducted at some tell settlements in Southeastern Romania that belong to the Kodjadermen – Gumelniţa - Karanovo VI culture (c. 4500-3800...
Article
Full-text available
This GGR biennial critical review covers developments and innovations in key analytical methods published since January 2014, relevant to the chemical, isotopic and crystallographic characterisation of geological and environmental materials. In nine selected analytical fields, publications considered to be of wide significance are summarised, backg...
Article
Twenty three glass bracelets fragments of different colors and appearances excavated at Păcuiul lui Soare, Dobrogea, Romania and dated to the 10th–11th century AD were analyzed for their chemical composition using Particle-Induced X-ray Emission (PIXE) and Particle-Induced Gamma-ray Emission (PIGE) techniques at AGLAE accelerator of Centre de Reche...
Article
An assemblage of 58 ceramic shards discovered in archaeological excavations at Oltina, Romania, dated to the 10th-11th century CE, was subjected to archaeometric investigations in order to reveal the raw materials and manufacturing techniques employed by the potters from the Lower Danube zone during the Byzantine ruling.The initial grouping of the...
Article
Full-text available
A set of colored glass tesserae (yellow, blue turquoise and green turquoise) discovered at Isaccea and dated to the 11th century AD was investigated using Ion Beam Analysis (IBA) techniques to determine their chemical composition. Particular attention was paid to identify the glass chromophores and opacifiers. Based on the analytical results, sever...
Article
Full-text available
This paper reports the particle induced X-ray emission (PIXE) and particle induced gamma-ray emission (PIGE) analyses of 78 glass bracelet fragments discovered in the Byzantine fortified settlement of Isaccea, Romania (10th–13th centuries AD). The chemical composition of the glass was used to identify the raw materials and manufacturing techniques....
Article
Advances in the chemical, crystallographic and isotopic characterisation of geological and environmental materials can often be ascribed to technological improvements in analytical hardware or to innovative approaches to data acquisition and/or its interpretation. This biennial review addresses key laboratory methods that form much of the foundatio...
Article
Full-text available
X-ray Computed Tomography (CT) is a powerful non-destructive technique that can yield interesting structural information not discernible through visual examination only. This paper presents the results of the CT scans of four objects belonging to the Romanian cultural heritage attributed to the Vinča, Cucuteni and Cruceni-Belegiš cultures. The stud...
Article
Full-text available
Deciphering the internal structure of prehistoric artefacts can provide spectacular insights that might help us understand the people who made them. In order to preserve the integrity of these relics of past civilisations, it is desirable to make such investigations using non-destructive techniques. Recent decades have witnessed a growth in the X-r...
Article
The chemical composition of twenty glass bracelet fragments found in Nufăru, a Byzantine site from 10th–13th centuries A.D., nowadays located on Romania's territory, has been determined using Particle Induced X-ray Emission (PIXE) and Particle Induced Gamma-ray Emission (PIGE) in external beam mode. Most of the Byzantine bracelet fragments were ide...
Article
Full-text available
This paper reports the chemical composition of some ancient metallic objects dated to the Bronze Age period and found on Romanian territory. Preliminary ED-XRF measurements were performed on cleaned areas of artefacts, while the nuclear microprobe experiments were conducted on tiny fragments detached from the same zones. The identified trace-elemen...
Article
Full-text available
Advances in the chemical and isotopic characterisation of geological and environmental materials can often be ascribed to technological improvements in analytical hardware. Equally, the creation of novel methods of data acquisition and interpretation, including access to better reference materials, can also be crucial components enabling important...
Article
Full-text available
This paper reports the chemical composition of twelve glass bracelet fragments discovered in the Byzantine site of Nufaru, Romania and dated from the 10 th to the 13 th century A. D. The experimental data were obtained using Ion Beam Analysis (IBA) techniques. The measurements were made using the external 3MeV proton micro-beam of the AGLAE acceler...
Article
Full-text available
Micro-Synchrotron Radiation X-Ray Fluorescence (SR-XRF) studies can help in the establishment of a typical signature (fingerprint) of gold coming from specific sources. The presence of trace elements (Sb, Sn, Te, Pb) in Transylvanian gold and the analysis of their concentrations in archaeological artifacts found on the territory of Romania can lead...
Article
Full-text available
Eight fragments of glass bracelets from the XVIII-XIX th centuries discovered in Bucharest were analyzed using external IBA methods (PIXE-PIGE) at AGLAE tandem accelerator, C2RMF, Paris and at HZDR tandem accelerator, Dresden. The investigated objects had different glass recipes, indicating their manufacturing in several workshops. Cupric oxide was...
Article
We present the authentication and analysis of these beautiful Dacian bracelets of the first century BC, originally pillaged by treasure hunters and recovered thanks to an international crime chase. They were originally fashioned from gold panned from the rivers or dug from the mines of Transylvania and hammered into the form of coiled snakes. The l...
Article
The technique of Computed Tomography (CT) combined with the pertinent interpretation of the obtained images is a powerful diagnostic tool which can provide details on the internal structure of a large class of objects, nowadays being largely employed in medical, industrial, material science and art work investigations.In this paper, the prototype o...
Article
Elemental analysis contributes to authentication (knowing the elemental composition and considering the information about the usual composition of the objects in different historical periods it can be established if the item is original or fake), provenance studies (minor and trace elements indicates ores origin and “consequently” mines location),...
Article
Studies by Synchrotron Radiation X-Ray Fluorescence (SR-XRF) for the search of the presence of trace elements like Sb, Sn, Te and Pb in archaeological metallic objects found on the territory of Romania - old coins and Bronze Age jewelry, aimed to determine the provenance of the gold used in their manufacture. The results are compared with the detai...
Article
This paper presents the results of analyses performed on 81 gold coins of Koson type found in Romanian public collections. The composition of the Koson type coins was compared to the composition of 42 Greek gold coins issued between the 4th and 1st centuries BC, three Roman gold coins issued in the second half of the 1st century BC, and a Lysimachu...
Article
Full-text available
The recovery of the Dacian gold bracelets was the most thrilling archaeological event of the last years in Romania. The artefacts are exhibited in the Historical Treasure section of the National History museum of Romania, Bucharest, being recovered from the international antique markets through a concerted effort of the Romanian, French, and German...
Article
Full-text available
This study focuses on the understanding of the elaborate construction of a cloisonné gold belt buckle, found in a princely grave from Apahida, dated to the 5th century AD. Starting from the careful analysis of the object’s proportions and dimensions, a geometrical pattern of the belt plate construction and decoration design is proposed. The intrica...
Article
To identify the provenance of gold archeological metallic artifacts, trace elements are more significant than the main components. The most promising elements are Platinum Group Elements (PGE), Sn, Sb, Hg, Pb, Te, and Cu. Several minute fragments of natural Transylvanian gold - placers and primary - were studied by micro Particle Induced X-ray Emis...
Article
Micro-PIXE investigations on some Transylvanian chondritic meteorite fragments and on small Moon soil pieces from the LUNA-16 mission were performed at the Legnaro and Rossendorf proton microprobes. The most exciting finding of the study was the presence of Pt grains in the Moci meteorite. The results are compared to previously published data.
Article
Full-text available
The paper presents an extensive archaeometrical study of two categories of ancient silver coins - Apollonia and Dyrrachium silver drachmae and Dacian drachamae. The coins of the former type were emitted by the-above mentioned Greek colonies which were under Pompejus authority during I st Century B.C., while the latter type were Dacian imitations of...
Article
Full-text available
The distributions of minor and trace elements in witnesses of the geological history of the Universe, like meteorites or the Moon, can provide knowledge on the processes, which took place during the formation of the Solar System. Micro-PIXE investigations on some Transylvanian meteorite fragments (Madaras, Moci group) and moon soil samples from the...
Article
Full-text available
This paper presents some applications of Particle Induced X-ray Emission (PIXE) and Energy-Dispersive X-Ray Fluorescence (ED-XRF) for the characterization of some medieval silver coins: Moldavian groats and bracteate pences. The elemental composition measurements were performed in connection with more comprehensive historical and numismatic studies...
Article
Full-text available
Crystalline phases present in pigments scratched off the surfaces of some decorated ceramic sherds belonging to the Cucuteni Neolithic culture were successfully identified using synchrotron radiation X-ray diffraction at Daresbury Laboratory. The ceramic sherds were selected from a collection of the National Museum of Romanian History in Bucharest....
Article
Minute fragments from nine gold nuggets from Transylvania -two belonging to placer deposits and seven to primary deposits -were analyzed by PIXE and PIGE at the AGLAE tandem accelerator of the Centre de Recherche et de Restauration des Musées de France (C2RMF) with 3 MeV proton beam extracted into air. This study was triggered by some archaeologica...
Article
Trace-elements are more significant for provenancing archaeological metallic artifacts than the main components. For gold, the most promising elements are platinum group elements (PGE), Sn, Te, Sb, Hg and Pb. Several small fragments of natural Transylvanian gold – placer and primary – were studied by using micro-PIXE technique at the Legnaro Nation...
Article
Full-text available
Two analytical methods - 241Am-based X-Ray Fluorescence (XRF) and Synchrotron Ra- diation X-ray Diffraction (SR-XRD) - were used to investigate the elemental and mineralogical com- position of pigments which decorate some Cucuteni Neolithic ceramic sherds. Local hematite and lo- cal calcite were the main components for red and white pigments, respe...
Chapter
Preventive policies for areas potentially exposed to radioactive contamination require management decisions which weigh the benefits of prevention against the risks and disruptions associated with their implementation. A framework is needed that integrates risk assessment and engineering options, compares options for risk reduction, communicates un...
Article
Full-text available
The Pb/InAs(111)B interface has been studied by synchrotron radiation photoelectron spectroscopy (SR-PES) of valence band and In4d, As3d and Pb5d core levels. Room temperature deposition of ∼1ML of Pb on InAs(111)B leads to an ordered overlayer that induces a metallic channel at the surface, as seen through a weak emission in the vicinity of the Fe...
Article
In the present paper, the possibility to use Synchrotron Radiation - based micro X-Ray Fluorescence (XRF) method to study the micro-inclusions of Platinum Group Elements (PGE) and other high temperature melting point metals in gold archaeological objects is demonstrated. The analyzed samples belonged to different pieces of the Pietroasa hoard. The...
Article
Full-text available
KU1 and KS-4V quartz glasses, known to be radiation-resistant insulator materials, are potential candidates for manufacturing diagnostics windows and optical fibres for ITER. KU1 and KS-4V quartz glass samples were irradiated with 12.6 and 14 MeV protons, respectively, at the Bucharest Tandem accelerator to simulate ionization and displacement dama...
Article
Five fragments of ancient gold objects belonging to Pietroasa “Cloşca cu Puii de Aur” (“The Golden Brood Hen with Its Chickens”) Romanian hoard were analysed using the micro-PIXE (particle induced X-ray emission) technique. The purpose of the study was to gain some more knowledge regarding the metal provenance by determining the presence of PGE (Pl...
Chapter
Full-text available
Study of ancient ceramics and glassy objects using nuclear methods can reveal details regarding the provenance of the artefacts and manufacturing techniques. For the present work, several analytical techniques were used: in vacuum 3 MeV protons PIXE (Particle Induced X-ray Emission) at Bucharest Tandem accelerator, 241Am source based XRF (X-Ray Flu...
Article
Full-text available
The purpose of this paper is to give a general layout for the potential applications of Energy-Dispersive X-Ray Fluorescence (ED-XRF) technique for ancient silver coins characterization, using in-situ (in museums) measurements. Examples concerning originality testing, provenance (mines, workshops) identification, counterfeits selection, historical...
Article
Combined external Ion Beam Analysis (IBA) measurements, consisting of Proton Induced X-ray Emission – Proton Induced Gamma-ray Emission – Rutherford Back-Scattering (PIXE -PIGE -RBS) have been performed on several obsidian fragments with archaeological significance at the Rossendorf Tandem accelerator using a 3.85 MeV proton beam. A comparison was...
Article
Full-text available
Several fragments of ancient gold objects coming from an Eneolithic hoard and from Pietroasa Cloca cu Puii de Aur (The Golden Brood Hen with Its Chickens) hoard, unearthed on Romanian territory, and two Romanian native gold nuggets samples were analyzed using micro-PIXE technique. The purpose of the study was to clarify the metal provenance. Trace...
Article
For coins, chemical differences that occur during preparation affect the elemental composition and can be used to identify the producing technologies and workshops and to distinguish between originals and counterfeits. In this study, we focus our attention on some Thassos silver tetradrachmae and on an important number of Apollonia–Dyrrhachium silv...
Article
Full-text available
Optical transmission materials will play v ery important roles in fusion reactors, where they will be used un der heavy irradiation environments. Our goal is to assess the suitability of SiO2 and Al2O3 based materials for both diagnostic and remote handling application, focusing on comparison of the ionization and displacement induced damage (influ...
Article
Obsidian is a natural volcanic glass, which was widely used for prehistoric stone tools and traded over long distances. In the case of Transylvania (the north-western part of Romania), the sources of the prehistoric tools are supposed to be Tokaj Mountains, Greek islands, Armenia and Turkish-Asia Minor. We used PIXE and XRF to analyse various obsid...
Chapter
It is widely recognized that environmental stress, especially environmental degradation, could contribute, under certain political, economic and social conditions, to the appearance of serious conflicts mainly in the developing countries (e.g. in Central and Eastern Europe). Romania and Bulgaria are potential examples in this regard, in relation to...
Article
. Quantitative analysis of various silver coins from the .rst century BC,found on current Romanian territory (Thasian tetradrachmae,Apollo- nia and Dyrrachium drachmae,Roman republican denarii)were performed using P XE (3 MeV external proton beam)and XRF (30 mCi 241 Am source). The elemental analysis provided evidence of a great variety of monetary...
Article
Ancient silver coins (drachms) issued by the Greek city Dyrrhachium during 68–43 years BC were analysed non-destructively by micro-PIXE method. The selected 27 drachms, including four imitations, belong to the numismatic collection of the Hungarian National Museum (HNM). Nine elements (Fe, Cu, Zn, Br, Ag, Sn, Au, Pb and Bi) were determined quantita...
Article
Full-text available
Quantitative analyses of various silver coins from the first century BC, found on current Romanian territory (Thasian tetradrachmae, Apollonia and Dyrrachium drachmae, Roman republican denarii) were performed using PIXE (3 MeV external proton beam) and XRF (1.1 GBq241Am source). The elemental analysis provided evidence of a great variety of monetar...
Article
In the last ten years the Bucharest U-120 classical variable-energy Cyclotron was employed as an intense source of fast neutrons produced by 13.5 MeV deuterons on a thick beryllium target [1], mainly for radio-biological and archaeometrical studies. To characterize this fast neutrons field, energy spectra, yields and average energy were determined...
Chapter
On 26 April, 1986, the Chernobyl nuclear power station, located in Ukraine, suffered a major accident, which was followed by the prolonged release of large quantities of radioactive substances to the atmosphere. This chapter summarizes the results of radioactivity measurements related to this nuclear accident (various foodstuffs, soils, water) and...
Article
The evolution of physics teaching and research in the two most important Romanian intellectual centers Bucharest and Jassy is discussed. Three stages of historical development are reported: 1860–1890: teaching process is predominant; period of first laboratories setting-up; sporadic researches in Physics Departments of Universities; 1890–1940: appe...
Conference Paper
New interest in radiation damage problems has been generated in the last decade with the advent of fast neutron reactors and design proposals for future fusion reactors. In general, materials will be subjected for much more intense radiation at high temperatures (0.2-0.5 melting point K) in the cores of fast reactors and the first walls of the prop...
Article
Full-text available
Studies on dose and energy dependence of blistering and flaking on stainless steels, Ni, Cu and Mo, produced by 3.0, 4.7 and 6.8 MeV He+ ion irradiation are presented. Using SEM (Scanning Electron Microscopy) and TEM (Transmission Electron Microscopy) techniques, irradiation phenomena such as sponge- and wave-like structures, submicronic cracks, mi...
Article
Due to the special interest in applications on radiotherapy, radiobiology, analysis and material testing, in the last years the Bucharest U-120 classical variable energy Cyclotron was employed as an intense source of fast neutrons produced by 13.5 MeV deuterons on a thick beryllium target, mainly for radiobiological and archaeometrical studies. Ene...
Article
The analysis of archaeological objects requires simultaneously, non-destructive, fast, versatile, sensitive and multielemental methods. Our purpose was to help Romanian archaeologists to identify objects provenance (workshops, technologies, mines) and to explain commercial, military and political aspects. Ancient Greek silver and Dacian gold coins...
Article
Full-text available
Several fragments of ancient gold objects belonging to Pietroasa 'Cloşca cu Puii de Aur ('The Golden Brood Hen with Its Chickens') Romanian hoard were analyzed using the micro-PIXE (Particle Induced X-ray Emission) technique. The purpose of the study was to gain some more knowledge regarding the metal provenance by determining the presence of PGE (...
Article
Full-text available
The analysis of archaeological objects requires simultaneously, non-destructive, fast, versatile, sensitive and multielemental methods. The purpose of our work is to help Romanian curators to identify objects provenance (workshops, technologies, mines) and to explain commercial, military and political aspects. Medieval Moldavian (XIV-XVI Centuries)...

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