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Welcome ceremony of Sam Webb at Orsay (LCP) September 23

Understanding the Physics of Radiation Damage Formation Mechanisms in Complex Heritage Samples

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Sam Webb, Head of Imaging at the Stanford Synchrotron, and Jean d’Alembert Visiting Professor at IPANEMA, will give an inaugural lecture on September 23 at 2 p.m. at Orsay LCP (Laboratoire de Chimie Physique) on "Understanding the Physics of Radiation Damage Formation Mechanisms in Complex Heritage Samples".

After a very productive visit in 2018, Sam Webb is joining IPANEMA once again as a visiting professor from July to October 2019. This professorship is funded by the Jean d’Alembert chair of the Paris Saclay Excellence Initiative (IDEX). The Laboratoire de Chimie Physique hosting the ceremony at Orsay is a close partner of IPANEMA (MUSIICS project).

Synchrotron radiation based x-ray techniques are increasingly used for spectroscopy and imaging of ancient and cultural heritage materials, due to the increasingly high brilliance of new x-ray sources. While the increased brilliance has helped to drive the accessibility of experiments to more difficult materials, it also has a stronger potential to no longer be a non-altering technique due to the high level of radiation exposure.

The research developed during the invited professorship aims to gain a better understanding of the physico-chemistry of potential x-ray radiation-induced damage formation mechanisms in complex cultural heritage samples, in particular ultramarine blue pigment. Further work in developing safe methods for data collection, multi-modal methods for in-situ monitoring, assessing dose-damage relationships in a variety of different materials of increasing complexity, as well as training activities, are planned for continuing collaboration with IPANEMA and the Université Paris-Saclay.

The collaboration between the Stanford Synchrotron and IPANEMA have produced many important discoveries, from the determination of trace elements and colored pigments in dinosaur fossils, deciphering of missing text in manuscripts and palimpsests, to the chemical changes that occur in paint pigments as ageing takes place.

Free entrance
Building 349, Magat room (ground floor, on your right)
Laboratoire de Chimie Physique
15 Av. Jean Perrin
91405 ORSAY Cedex
Please use the intercom

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Post-scriptum :

This conference is supported by the Jean d’Alembert fellowship program, offered by Paris Saclay University to encourage highly-qualified international scientists to stay for long periods in one of its laboratories.