|Message: Re: Why must an unstable ion decay when at rest ?||Not Logged In (login)|
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On Tue, 03 Feb 2015 09:44:29 GMT, michel maire wrote:
> On Tue, 03 Feb 2015 04:36:29 GMT, Andrea Conti wrote: > > G4RadioactiveDecay has the method AtRestDoIt. Why must an unstable ion > > decay at rest ? What is the relevance of being at rest for the > > radioactive decay to take place ? > > Please, try to produce and to show us few lines (with /tracking/verbose 2) demonstrating a radioactive > decay in fly.
Hi, Michel! As I noted in my reply, the process is rest-discrete, so it has both methods. You're quite right that generally speaking, any produced ion will lose energy so fast that it gets stopped before it decays. But that's not true in principle.
Consider simulating something like TRIUMF's ISAC, which produces radioactive beams. In that case, some of the isotopes should have short enough lifetimes to decay in flight, and we _should_ be simulating that. Whether it actually works in G4, I haven't directly needed to test.
-- Mike Kelsey
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