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None Re: QGSP_BERT_HP time cut for neutrons 

Forum: Physics List
Re: Question QGSP_BERT_HP time cut for neutrons (filippo)
Re: None Re: QGSP_BERT_HP time cut for neutrons (Robert Hatcher)
Re: Agree Re: QGSP_BERT_HP time cut for neutrons (filippo)
Date: 30 Apr, 2014
From: Robert Hatcher <Robert Hatcher>

On Wed, 30 Apr 2014 15:01:38 GMT, filippo wrote: I've made a couple of tests, QGSP_BERT kills neutron while _HP seems to let them go till the border of the world. I'll try your suggested commands and let you know. Another question: the time is calculated from the "birth" of the particle, i mean time 0 is when GPS generates the particle or an interaction produces the neutron. Am I right?
Its been several years since this tripped us up and we added those lines to our .mac file. In our case particles were being put into G4 with initial times of 15μsec, which being >10μsec, meant they were immediately killed. So I'm guessing its the time since the start of the "event", i.e. GlobalTime. I think this is reflected in the header source (see PostStepGetPhysicalInteractionLength in G4NeutronKiller.hh)

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