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Accuracy of the EGSnrc Monte Carlo Code System

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<strong>Accuracy</strong> <strong>of</strong> multiple scattering<br />

Multiple scattering is a dominant physical effect for e-<br />

<strong>EGSnrc</strong> uses a multiple scattering <strong>the</strong>ory developed by<br />

Kawrakow (NIMB 134 (1998) 325-336)<br />

It has <strong>the</strong> advantage <strong>of</strong> seamlessly converting into a<br />

single scattering <strong>the</strong>ory for very short steps.<br />

Recently <strong>the</strong>re have been some high quality<br />

measurements done by my ex-colleagues at NRC to test<br />

<strong>the</strong> <strong>the</strong>ory as implemented in <strong>EGSnrc</strong><br />

Ross et al, Med Phys 35 (2008)4121 - 4131<br />

i<br />

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