Abstract
Characterization by micro-Raman spectroscopy of polymeric materials used as
nuclear track detectors reveals physico-chemical and morphological information on
the material's molecular structure. In this work, the nuclear track detector
poly(allyl diglycol carbonate), or Columbia Resin 39 (CR-39), was characterized
according to the fluence of alpha particles produced by a <sup>226</sup>Ra source
and chemical etching time. Therefore, damage of the CR-39 chemical structure due to
the alpha-particle interaction with the detector was analyzed at the molecular
level. It was observed that the ionization and molecular excitation of the CR-39
after the irradiation process entail cleavage of chemical bonds and formation of
latent track. In addition, after the chemical etching, there is also loss of polymer
structure, leading to the decrease of the group density C-O-C (~888
cm<sup>-1</sup>), CH=CH (~960 cm<sup>-1</sup>), C-O (~1110 cm<sup>-1</sup>), C-O-C
(~1240 cm<sup>-1</sup>), C-O (~1290 cm<sup>-1</sup>), C=O (~1741 cm<sup>-1</sup>),
-CH<sub>2</sub>- (~2910 cm<sup>-1</sup>), and the main band -CH<sub>2</sub>-
(~2950 cm<sup>-1</sup>). The analyses performed after irradiation and chemical
etching led to a better understanding of the CR-39 molecular structure and better
comprehension of the process of the formation of the track, which is related to
chemical etching kinetics.
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Add to BibSonomy