From: Giuseppe Battistoni <>
Date: Wed, 29 Jul 2009 09:24:56 +0200 (CEST)

As stated in the manual, USRYIELD can be used to calculate the angular
distribution of emitted/produced particles, at the boundary between two
adjacent regions. The angle is defined as the polar angle measured with
respect to the direction of the primary beam particles.

Notice that instead, by means of the USRBDX scoring, you can
calculate the angular distribution only with respect to the
direction perpedicular to the boundary surface in the crossing point.

        Giuseppe Battistoni

On Thu, 23 Jul 2009, Lee, Hee-Seock wrote:

> Dear Everyone
> There is simple question about USRYIELD.
> The command can generate differential yields at different angles.
> I understand the angle range is in a space defined by the boundary input
> But I am not sure where is the origin of the coodinate system to define
> the angle.
> If the target is small and the bourdary is very far from the target,
> then the differential yield
> is not affected by the geometry.
> But if the target is enoughly big. Then situation will be different.
> Anyway simple question is where is the origin of the coordinate system
> Thanks in advance for any comments.
> Heee-Seock Lee
Received on Wed Jul 29 2009 - 10:06:43 CEST

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