Band depth correction factor, or the normalized band depth of the 4.14 μm absorption, versus amorphous fraction from Equation (2) during irradiation of a 6.18 × 10¹⁸ H₂O cm⁻² sample with 10 keV electrons at 10 K (red open circles), 30 K (blue open triangles), and 50 K (black closed circles). The line is the relation ﹩{D}_{B,\mathrm{correction}}=1.0-{\varphi }_{a}﹩.