TY - JOUR A1 - Mantouvalou, I. A1 - Wolff, Timo A1 - Hahn, Oliver A1 - Rabin, Ira A1 - Lühl, Lars A1 - Pagels, M. A1 - Malzer, W. A1 - Kanngiesser, B. T1 - 3D Micro-XRF for cultural heritage objects: new analysis strategies for the investigation of the Dead Sea scrolls N2 - A combination of 3D micro X-ray fluorescence spectroscopy (3D micro-XRF) and micro-XRF was utilized for the investigation of a small collection of highly heterogeneous, partly degraded Dead Sea Scroll parchment samples from known excavation sites. The quantitative combination of the two techniques proves to be suitable for the identification of reliable marker elements which may be used for classification and provenance studies. With 3D micro-XRF, the three-dimensional nature, i.e. the depth-resolved elemental composition as well as density variations, of the samples was investigated and bromine could be identified as a suitable marker element. It is shown through a comparison of quantitative and semiquantitative values for the bromine content derived using both techniques that, for elements which are homogeneously distributed in the sample matrix, quantification with micro-XRF using a one-layer model is feasible. Thus, the possibility for routine provenance studies using portable micro-XRF instrumentation on a vast amount of samples, even on site, is obtained through this work. KW - Archaeometry KW - 3D X-ray spectroscopy PY - 2011 U6 - https://doi.org/10.1021/ac2011262 SN - 0003-2700 SN - 1520-6882 VL - 83 IS - 16 SP - 6308 EP - 6315 PB - American Chemical Society CY - Washington, DC AN - OPUS4-25209 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hahn, Oliver A1 - Wolff, Timo A1 - Kanngießer, B. A1 - Malzer, W. A1 - Mantouvalou, I. T1 - Non-destructive investigation of the scroll material: "4QComposition concerning divine providence" (4Q413) KW - X-ray fluorescence analysis KW - Cultural heritage PY - 2007 SN - 0929-0761 SN - 1568-5179 VL - 14 IS - 3 SP - 359 EP - 364 PB - Brill CY - Leiden AN - OPUS4-16087 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kanngießer, B. A1 - Mantouvalou, I. A1 - Malzer, W. A1 - Wolff, Timo A1 - Hahn, Oliver T1 - Non-destructive, depth resolved investigation of corrosion layers of historical glass objects by 3D Micro X-ray fluorescence analysis N2 - 3D Micro X-ray fluorescence analysis was used for the investigation of reverse-glass paintings. The material-specific combination used in reverse-glass paintings leads to damage phenomena reinforced by glass corrosion. To elucidate the mechanism of corrosion processes taking place in the glass object depth profiles of mobile elements are of interest. In order to obtain elemental depth profiles of such kind of fragile objects the method of choice should be non-destructive. Our first results demonstrate the usefulness of the 3D Micro-XRF measurements for this kind of investigations. The assumption that certain binding media may initiate corrosion processes beginning at the interface glass/binding material could be confirmed. KW - Cultural heritage KW - 3D-micro XRF KW - Glass corrosion KW - Quantification PY - 2008 U6 - https://doi.org/10.1039/b717286a SN - 0267-9477 SN - 1364-5544 VL - 23 SP - 814 EP - 819 PB - Royal Society of Chemistry CY - London AN - OPUS4-17544 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hahn, Oliver A1 - Rabin, Ira A1 - Wolff, Timo A1 - Kanngießer, B. A1 - Malzer, W. A1 - Mantouvalou, I. A1 - Schade, U. A1 - Masic, Admir A1 - Weinberg, G. T1 - Non-destructive investigation of the dead sea scrolls N2 - The Dead Sea Scrolls belong to the most important cultural assets of mankind. Their long term preservation and study is a challenge that demands an interdisciplinary approach. As early as the 1950s natural scientists assisted the scholars in studying the scrolls. It was at this time that the first extensive study of the scroll material took place. It was found that most fragments were written not on leather but on parchment. In addition, a method for determining the age of the parchment was developed which is still of value today. In the 1990s the AMS-C14 method confirmed the palaeographic determination of the age of the manuscripts. The use of carbon ink throughout the scrolls is also consistent with the known scribal practices of that time. There are, however, manuscripts, and among them the famous Genesis Apocryphon Scroll, which exhibit ink corrosion, normally associated with iron-gall inks. Today, 60 years after their discovery, a community of scientists from the Jewish National and University Library (JNUL), the Technical University of Berlin (TU Berlin), the Federal Institute for Materials Research and Testing (BAM) and Fritz-Haber-Institute of the MPG (FHI) set out to scientifically investigate the finds of Qumran using the most modern methods. The results of the study will be used to determine the provenance of the texts as well as to contribute to their long-term preservation. A considerable part of the non-destructive investigation is taking place in the Berlin State Library and at the Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung , BESSY II. Preliminary investigations, performed at the BAM on some fragments, were used to evaluate the extent to which X-ray analytical methods can provide information regarding the geographical origin of the fragments and match the individual pieces. The interpretation of the measurement results is made more difficult by age and storage of the objects. It is believed that ageing processes as well as conservation methods have altered the samples in addition to the changes caused by environmental influences. In collaboration with the TU Berlin, the samples from the parchments found in the caves near Qumran were tested by means of three-dimensional synchrotron based X-ray fluorescence analysis (3D-SyXRF). The aim of this non-destructive investigation was the identification of the inorganic material used in the manufacture of the parchments. The XRF experiments are supported by the non-destructive analysis by means of synchrotron based infrared spectroscopy (SyFTIR) in collaboration with BESSY II as well as optical and electron microscopy in collaboration with Fritz-Haber-Institute (FHI). T2 - Art 2008, 9th International Conference CY - Jerusalem, Israel DA - 2008-05-25 KW - Cultural heritage KW - Archaeometry KW - Micro-XRF KW - Quantification KW - Parchment KW - DSS PY - 2008 IS - CD-ROM SP - 1 EP - 7 PB - ISAS International Seminars CY - Jerusalem, Israel AN - OPUS4-17547 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lühl, Lars A1 - Mantouvalou, I. A1 - Malzer, W. A1 - Schaumann, I. A1 - Vogt, C. A1 - Hahn, Oliver A1 - Kanngiesser, B. T1 - Reconstruction procedure for 3D micro X-ray absorption fine structure N2 - A new approach for chemical speciation in stratified systems using 3D Micro-XAFS spectroscopy is developed by combining 3D Micro X-ray Fluorescence Spectroscopy (3D Micro-XRF) and conventional X-ray Absorption Fine Structure Spectroscopy (XAFS). A prominent field of application is stratified materials within which depth-resolved chemical speciation is required. Measurements are collected in fluorescence mode which in general lead to distorted spectra due to absorption effects. Developing a reliable reconstruction algorithm for obtaining undistorted spectra for superficial and in-depth layers is proposed and validated. The developed algorithm calculates the attenuation coefficients of the analyte for the successive layers facilitating a new spectroscopic tool for three-dimensionally resolved nondestructive chemical speciation. KW - X-ray absorption fine structure KW - 3D X-ray fluorescence analysis PY - 2012 U6 - https://doi.org/10.1021/ac202285d SN - 0003-2700 SN - 1520-6882 VL - 84 IS - 4 SP - 1907 EP - 1914 PB - American Chemical Society CY - Washington, DC AN - OPUS4-26941 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bjeoumikhov, A. A1 - Erko, M. A1 - Bjeoumikhova, Zemfira A1 - Erko, A. A1 - Snigireva, I. A1 - Snigirev, A. A1 - Wolff, Timo A1 - Mantouvalou, I. A1 - Malzer, W. A1 - Kanngießer, B. T1 - Capillary µFocus X-ray lenses with parabolic and elliptic profile KW - Synchrotron radiation KW - Capillary optics KW - Beamline optics PY - 2008 U6 - https://doi.org/10.1016/j.nima.2008.01.087 SN - 0168-9002 SN - 0167-5087 VL - 587 IS - 2-3 SP - 458 EP - 463 PB - North-Holland CY - Amsterdam AN - OPUS4-18922 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wolff, Timo A1 - Mantouvalou, I. A1 - Malzer, W. A1 - Nissen, J. A1 - Berger, D. A1 - Zizak, I. A1 - Sokaras, D. A1 - Karydas, A. A1 - Grlj, N. A1 - Pelicon, P. A1 - Schütz, R. A1 - Zitniki, M. A1 - Kanngießer, B. T1 - Performance of a polycapillary halflens as focussing and collecting optic - a comparison N2 - Polycapillary halflenses are widely used to focus X-ray radiation onto a small spot. Additionally they can reduce the field of view of a semiconductor detector when placed in front of one. In 3D micro X-ray fluorescence spectroscopy (3D Micro-XRF) with synchrotron radiation, two polycapillary halflenses are used in a confocal geometry. Up until now, characterization measurements in the focal plane have only been performed in the case of the lens focusing parallel radiation. Assumptions have been made, that in the other case, when isotropic radiation from a spot source is transported to a detector, the acceptance distribution in the focal plane is also Gaussian. We performed measurements with an electron beam as well as a proton beam which confirm this assumption. In addition, a comparison between measurements in collecting and focusing mode show differences in spot size and transmission. These differences exemplify the fact that there is not one global spot size or transmission function of a polycapillary halflens. Illumination and divergence effects can alter both characteristic lens parameters. PY - 2009 U6 - https://doi.org/10.1039/b817828c SN - 0267-9477 SN - 1364-5544 VL - 24 SP - 669 EP - 675 PB - Royal Society of Chemistry CY - London AN - OPUS4-19415 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wolff, Timo A1 - Malzer, W. A1 - Mantouvalou, I. A1 - Hahn, Oliver A1 - Kanngießer, B. T1 - A new fundamental parameter based calibration procedure for micro X-ray fluorescence spectrometers N2 - Fundamental parameter based quantification of X-ray fluorescence (XRF) measurement data requires an accurate knowledge of the spectrometer parameters, including the spectral distribution of the excitation radiation. In case of micro-XRF where a polycapillary optic is utilized in the excitation channel this distribution is changed due to the transmission properties of the lens. A new calibration procedure, based on fluorescence data of thin standard samples, was developed to determine the excitation spectrum, i.e., the product of the X-ray tube spectrum and the transmission of the used X-ray optic of a micro-XRF setup. The calibration result was validated by the quantitative analyses of certified multi-element reference standards and shows uncertainties in the order of 2% for main components, 10% for minor elements and 25% for trace elements. The influence of secondary order effects like Coster–Kronig transitions and cascade effects is analyzed and the accuracy of fundamental parameters in common databases is discussed. KW - Polycapillary optic KW - Transmission KW - Micro-XRF calibration KW - Reference free quantification PY - 2011 U6 - https://doi.org/10.1016/j.sab.2011.01.009 SN - 0584-8547 SN - 0038-6987 VL - 66 IS - 2 SP - 170 EP - 178 PB - Elsevier B.V. CY - Amsterdam AN - OPUS4-24213 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Grötzsch, D. A1 - Streeck, C. A1 - Nietzold, Carolin A1 - Malzer, W. A1 - Mantouvalou, I. A1 - Nutsch, A. A1 - Dietrich, Paul A1 - Unger, Wolfgang A1 - Beckhoff, B. A1 - Kanngießer, B. T1 - A sealable ultrathin window sample cell for the study of liquids by means of soft X-ray spectroscopy N2 - A new sample cell concept for the analysis of liquids or solid-liquid interfaces using soft X-ray spectroscopy is presented, which enables the complete sealing of the cell as well as the Transport into vacuum via, for example, a load-lock system. The cell uses pressure monitoring and active as well as passive pressure regulation systems, thereby facilitating the full control over the pressure during filling, sealing, evacuation, and measurement. The cell design and sample preparation as well as the crucial sealing procedure are explained in detail. As a first proof-of-principle experiment, successful nitrogen K-edge fluorescence yield near-edge X-ray absorption fine structure experiments of a biomolecular solution are presented. For this purpose, it is shown that the careful evaluation of all involved parameters, such as window type or photon flux, is desirable for optimizing the experimental result. KW - X-ray spectroscopy KW - Analysis of liquids KW - Wet cell KW - Concanavalin A KW - NEXAFS PY - 2017 U6 - https://doi.org/10.1063/1.5006122 SN - 0034-6748 SN - 1089-7623 VL - 88 IS - 12 SP - 123112-1 EP - 123112-7 PB - American Institute of Physics AN - OPUS4-43611 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -