High-energy-ion-irradiation effects on polymer materials: 3. The sensitivity of cellulose triacetate and poly(methyl methacrylate)

The changes in sensitivity of a cellulose triacetate (CTA) film dosimeter is reported as a function of linear energy transfer (LET). The change in molecular weight of poly(methyl methacrylate) (PMMA) is also reported. For both materials, little or no LET effect was observed up to a threshold LET, bu...

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Bibliographic Details
Published in:Polymer (Guilford) 1996-07, Vol.37 (14), p.2903-2908
Main Authors: Kudoh, H., Sasuga, T., Seguchi, T., Katsumura, Y.
Format: Article
Language:English
Subjects:
Applied sciences
cellulose triacetate
Crosslinking and degradation
Exact sciences and technology
ion irradiation
Physicochemistry of polymers
poly(methyl methacrylate)
Polymers and radiations
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Summary:The changes in sensitivity of a cellulose triacetate (CTA) film dosimeter is reported as a function of linear energy transfer (LET). The change in molecular weight of poly(methyl methacrylate) (PMMA) is also reported. For both materials, little or no LET effect was observed up to a threshold LET, but the sensitivity or radiation yield decreased with increasing LET above this threshold level. The threshold LET level was similar for both polymers, occurring at around a few hundreds of MeV cm 2g −1, with this level probably corresponding to the overlapping of spurs along the ion's path.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(96)89385-2