Neutron Attenuation Coefficient of Water

Neutron radiography measures the spatially resolved neutron transmission through a sample. The neutron transmission is derived from the Lambert-Beer Law of attenuation, which in differential form is 

Attenuation Coefficient Measured in the Calibration Experiment The Uncertainty is the One-Sigma Fit Error. The Reduced-Chi-Square for Each Fit was of Order 1. 

The water content in an operating fuel cell is obtained from the ratio of the background (B) corrected images of the operating fuel cell (/ = /w—/i) to the dry fuel cell (/d =I, —B), where the tilde indicates the raw, measured image  

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