Dear All,
I irradiated some organic samples with X_ray and observed color change but not chemical change in the compounds. How can I justify this color change? Does the color change mean any alterations or decomposition?
Thanks,
Sevan
You always ionize atoms in your sample when irradiating them with X-rays. For low-Z elements this may also mean, that you directly break or alter chemical bonds. Especially organic material may react with color change. I have seen this in precious stones and also parchment, which - by the way - was a reversible process. Especially when using high fluences (f.e. synchrotron excitation) the monitoring of radiation damage is mandatory and the often claimed non-destructiveness of X-ray techniques is not strictly correct.
Dear Sevan,
please have a look at the RG link below. The title seem to be promising.
You can request full paper. Just click on the title. I have just done it.
Best regards
Gerhard
There is a second interesting link (wiley). But one has to pay for. May be you can get this paper via your institution.
Please open the .docx file. The link does not work directly via the RG link option.
In addition please see reference no. 1 in the second link ( ....sterilized-products).
http://www.mddionline.com/article/polymer-materials-selection-radiation-sterilized-products
Article Color formation in irradiated polymers
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