Table 2.

The breakdown of the dose to various layers of EBT film based on what percentage of electrons entered from above or below or stayed entirely within the layer of interest. The total dose to the layer per unit fluence incident on the phantom (in Gy cm²) is also included. The only layer that is not water is the surface layer. Data from a simulation where all layers are water are also included. Data are shown with the absolute one standard deviation uncertainty in brackets.

Layer		Surface only	All water
10 keV
Active (upper)	Total dose	5.51E−14 (2E−16)	5.48E−14 (2E−16)
	% above	9.81 (0.05)	9.88 (0.05)
	% below	0.83 (0.01)	0.54 (0.01)
	% within	89.36 (0.05)	89.58 (0.05)
Surface	Total dose	1.30E−13 (4E−16)	5.45E−14 (2E−16)
	% above	8.54 (0.05)	18.78 (0.2)
	% below	0.78 (0.01)	1.33 (0.04)
	% within	90.69 (0.05)	80.0 (0.2)
Active (lower)	Total dose	5.59E−14 (2E−16)	5.44E−14 (2E−16)
	% above	12.65 (0.06)	9.89 (0.05)
	% below	0.51 (0.01)	0.53 (0.01)
	% within	86.84 (0.06)	89.58 (0.05)
50 keV
Active (upper)	Total dose	5.54E−13 (2E−15)	4.95E−13 (1E−15)
	% above	29.6 (0.2)	33.1 (0.1)
	% below	22.6 (0.2)	12.89 (0.06)
	% within	47.7 (0.3)	54.0 (0.1)
Surface	Total dose	6.60E−13 (3E−15)	4.92E−13 (1E−15)
	% above	31.3 (0.2)	40.8 (0.2)
	% below	18.2 (0.2)	21.9 (0.1)
	% within	50.5 (0.3)	37.3 (0.2)
Active (lower)	Total dose	6.22E−13 (2E−15)	4.93E−13 (1E−15)
	% above	46.5 (0.2)	33.0 (0.1)
	% below	10.7 (0.1)	12.84 (0.06)
	% within	42.8 (0.3)	54.1 (0.1)
200 keV
Active (upper)	Total dose	1.117E−12 (5E−15)	1.101E−12 (4E−15)
	% above	52.4 (0.6)	53.1 (0.3)
	% below	13.4 (0.2)	12.7 (0.1)
	% within	34.2 (0.4)	34.2 (0.4)
Surface	Total dose	1.050E−12 (5E−15)	1.103E−12 (6E−15)
	% above	59.2 (0.4)	60.3 (0.4)
	% below	20.3 (0.2)	21.4 (0.2)
	% within	20.4 (0.4)	18.3 (0.4)
Active (lower)	Total dose	1.103E−12 (4E−15)	1.107E−12 (4E−15)
	% above	53.6 (0.3)	53.4 (0.3)
	% below	12.7 (0.1)	12.6 (0.1)
	% within	33.7 (0.4)	34.0 (0.4)