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Dead sea Scrolls: materials characterisation by means of synchrotron based µ-FTIR spectroscopy
(2007)
The Erfurt Hebrew Giant Bible and the Experimental XRF Analysis of Ink and Plummet Composition
(2007)
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).
Abstract For many years after the discovery of the Dead Sea Scrolls, text analysis and fragment attribution were the main concern of the scholars dealing with them. The uncertain archaeological provenance of a large part of the collection added an additional difficulty to the formidable task of sorting thousands of fragments. After sixty years of scholarly research, the questions of origin, archaeological provenance, and correct attribution of the fragments are still debated. In many cases, material characterization of the scroll writing media delivers answers to these questions. Physical and chemical examination of the skin-based material of the Dead Sea Scrolls started shortly after their discovery. Subsequent studies dedicated to long-term preservation resulted in a respectable body of knowledge about this material, in many ways very different from medieval parchment. A new multi-instrumental approach, developed for an accurate characterization of the highly inhomogeneous 'parchment' of the Dead Sea Scrolls, might lead to a reliable reconstruction of their history. This approach is illustrated by the case studies, in which we discuss the specific questions of origin (1QHa), archaeological provenance (11QTa), and post-discovery interventions (1QapGen ar).
Quantifying degradation of collagen in ancient manuscripts: the case of the Dead Sea Temple Scroll
(2013)
Since their discovery in the late 1940s, the Dead Sea Scrolls, some 900 ancient Jewish texts, have never stopped attracting the attention of scholars and the broad public alike, because they were created towards the end of the Second Temple period and the 'time of Christ'. Most of the work on them has been dedicated to the information contained in the scrolls' text, leaving physical aspects of the writing materials unexamined. They are, however, crucial for both historical insight and preservation of the scrolls. Although scientific analysis requires handling, it is essential to establish the state of degradation of these valued documents. Polarized Raman Spectroscopy (PRS) is a powerful tool for obtaining information on both the composition and the level of disorder of molecular units. In this study, we developed a non-invasive and non-destructive methodology that allows a quantification of the disorder (that can be related to the degradation) of protein molecular units in collagen fibers. Not restricted to collagen, this method can be applied also to other protein-based fibrous materials such as ancient silk, wool or hair. We used PRS to quantify the degradation of the collagen fibers in a number of fragments of the Temple Scroll (11Q19a). We found that collagen fibers degrade heterogeneously, with the ones on the surface more degraded than those in the core.
The paper 'The constituents of the ink from a Qumran inkwell: New prospects for provenancing the ink on the Dead Sea Scrolls' by Rasmussen et al. (2012) presents an account of the analysis of a residue from an unprovenanced inkwell. In this comment, I reassess their study and offer alternative interpretations of their experimental results.
The analysis of physical and chemical properties of artefacts provides important data for answering questions that cannot be solved by historical and philological methods alone. In its individual materiality, each manuscript is the result of various influences (e.g. production, storage, restoration, preservation). Given the recent technological developments (e.g. miniaturization of structural units, enlargement of memory capacity), technical diagnostics of art and cultural objects are becoming increasingly sought after in trans-disciplinary research. In this review we present a multi-instrumental approach to the investigation of manuscripts. Several case studies will illuminate our methodology.