Soft X-ray radiation-damage studies in PMMA using a cryo-STXM
- 25 April 2003
- journal article
- research article
- Published by International Union of Crystallography (IUCr) in Journal of Synchrotron Radiation
- Vol. 10 (3) , 280-283
- https://doi.org/10.1107/s0909049503003261
Abstract
Radiation damage sets a fundamental limit for studies with ionizing radiation; cryo-methods are known to ease these limits. Here, measurements on mass loss and the decrease in the C=O bond density as measured by oxygen-edge XANES (NEXAFS) spectroscopy in thin films of poly(methylmethacrylate) (PMMA), studied in a vacuum, are reported. While cryo-methods allow more than 95% of the mass to remain at doses up to 10(7) Gy, there is little difference in C=O bond density versus dose between 298 K and 113 K sample temperatures. At both temperatures the critical dose for bond breaking is approximately 15 x 10(6) Gy.Keywords
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