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Forum: Event and Track Management
Re: Question changing weight of the primary (Alexei Klimenko)
Date: 16 Jan, 2007
From: Jane Tinslay <Jane Tinslay>

Hello Alexi,

It looks like G4ParticleChange has its own ProposeWeight method to change
the parent weight (I'm not sure why it doesn't use the weight set through

Perhaps you could try G4ParticleChange::ProposeWeight ? I guess you'd have
to cast from G4VParticleChange to G4ParticleChange if necessary.



On Fri, 12 Jan 2007, Alexei Klimenko wrote:

> *** Discussion title: Event and Track Management
> Email replies to must include:
>   In-Reply-To: <"/eventtrackmanage/585">
>   Subject: ...change this to be about your reply.
> Greetings,
> I am trying to implement survival biasing. In order to do that I need to
> be able to change the weight of the primary particle.
> I tried using ProposeParentWeight with no luck. It never actually
> changes the weight for the PostStepPoint.
> I started going to deeper into the code.
> It looks like Weight of the PostStepPoint should be updated through
> UpdateStepForPostStep in G4VParticleChange.icc. However this function
> never gets called by the SteppingManager. Instead InvokePSDIP function
> from calls UpdateStepForPostStep from the concrete
> instance
> What am I missing?
> Thank you, Alexei

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