Table 4.

Differences between measured and simulated FWHM, FW0.01M, and FW0.001M for in-water lateral profiles at five depths for 72.5 and 148.8 MeV pencil beams and seven depths for the 221.8 MeV pencil beam. The differences were obtained from the data represented in Fig. 6.

Energy (MeV)	Meas.-MC (standard MCS) (cm)			Meas.-MC (new MCS) (cm)
	FWHM	FW0.01M	FW0.001M	FWHM	FW0.01M	FW0.001M
72.5	<0.10	<1.7	<3.0	<0.11	<2.4	<4.8
148.8	<0.05	<0.31	<1.2	<0.12	<0.46	<1.0
221.8	<0.15	<0.24	<1.1	<0.05	<0.44	<1.3