TITLE

Absolute calibration of Kodak Biomax-MS film response to x rays in the 1.5- to 8-keV energy range

AUTHOR(S)
Marshall, F. J.; Knauer, J. P.; Anderson, D.; Schmitt, B. L.
PUB. DATE
October 2006
SOURCE
Review of Scientific Instruments;Oct2006, Vol. 77 Issue 10, p10F308
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The absolute response of Kodak Biomax-MS film to x rays in the range from 1.5- to 8-keV has been measured using a laboratory electron-beam generated x-ray source. The measurements were taken at specific line energies by using Bragg diffraction to produce monochromatic beams of x rays. Multiple exposures were taken on Biomax MS film up to levels exceeding optical densities of 2 as measured by a microdensitometer. The absolute beam intensity for each exposure was measured with a Si(Li) detector. Additional response measurements were taken with Kodak direct exposure film (DEF) so as to compare the results of this technique to previously published calibrations. The Biomax-MS results have been fitted to a semiempirical mathematical model (Knauer et al., these proceedings). Users of the model can infer absolute fluences from observed exposure levels at either interpolated or extrapolated energies. To summarize the results: Biomax MS has comparable sensitivity to DEF film below 3 keV but has reduced sensitivity above 3 keV (∼50%). The lower exposure results from thinner emulsion layers, designed for use with phosphor screens. The ease with which Biomax-MS can be used in place of DEF (same format film, same developing process, and comparable sensitivity) makes it a good replacement.
ACCESSION #
23073303

 

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