Journal of the Korean Physical Society

Korean Physical Society (한국물리학회)
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On the X-Ray Reflectivity by Poly Allyl Diglycol Carbonate (PADC)

  • Ghazaly, M. El (Department of Physics, Faculty of Science, Zagazig University)
  • Published : 2011.07.15
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Abstract

X-ray reflectivity via the poly allyl diglycol carbonate (CR-39 polymer sheet) was investigated. X-ray reflectivity was measured for a pristine and a chemically etched CR-39 detector in 6.25N NaOH at $(70\;{\pm}\;0.5)^{\circ}C$ for different durations. Far from the spectral peak, the reflectivity of the CR-39 polymer sheet has a wide peak at $2{\theta}\;=\;20.1^{\circ}$, and its intensity is decreased by increasing the etching time. Moreover, the integrated counts under the peaks, $C(t_e)$, vary linearly as a function of the etching time $t_e$. Data are fitted using a linear function $C(t_e)\;=\; A\;+\;Bt_e$, with fitting parameters $A\;=\;(3271\;{\pm}\;170)\;and\;B\;=\;(-960\;{\pm}\;84)$. The reflectivity deterioration is attributed to the increase of CR-39 surface's roughness due to the chemical etching. The rocking curves of X-ray reflectivity were measured for a pristine and an etched CR-39 polymer sheet. Specular reflections are observed, as well as Yoneda wings, which broaden and move away from the specular reflections due to the increase in the CR-39 surface's roughness.

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References

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