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Erschienen in:
1984 | OriginalPaper | Buchkapitel
Effect of Neutron and Proton Irradiation on Some Properties of Kapton
verfasst von : V. Shrinet, U. K. Chaturvedi, S. K. Agrawal, V. N. Rai, A. K. Nigam
Erschienen in: Polyimides
Verlag: Springer US
Enthalten in: Professional Book Archive
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Photoacoustic, dielectric and surface-morphological properties of Kapton* were studied after exposing sheets (25 μm thick) separately to fast reactor neutrons (E>0.1 MeV) and to 250 keV protons up to doses 1.2×1018 (maximum)and 7.0×1015 cm−2, respectively. The photoacoustic spectrum (PAS) of the maximum neutron dose irradiated sample shows the red-shift of the absorption peak from 450 nm to 470 nm, whereas in the proton irradiated (7×1015 cm−2) sample, a new flattened absorption peak appears at λ ≃ 515 nm. There is a net enhancement in the D.C. dielectric constant of about 13% after the maximum neutron dose. It is attributed to the enhanced water absorptivity of the material due to neutron induced radiation damage.