From: Markus Brugger (Markus.Brugger@cern.ch)
Date: Wed Aug 22 2007 - 18:59:40 CEST
Hi Mary,
in very general terms yes, however most probably not for your kind of
application, i.e., ATRACK (TRACKR common block) allows for a time
dependent 'scoring' using the collision tape and it is then the 'age' of
the current particle, i.e., the time in seconds after the start of the
primary transport (t=0).
BUT, if I understand your configuration correctly, you would like to
look into the decay products coming from RADDECAY in terms of the
absolute decay time, thus this would generally be only possible if
you're using semi-analogue mode (RADDECAY What(1)>1). Even then, ATRACK
wouldn't be the full story as you would also need the delay from the
interaction time ('production'), something possible using AGESEC (GENSTK
common block), but not straight forward!
As this procedure is rather complicated you should be sure that you
really need this information on an event basis. If not, the standard
scoring allows you to score particle energy spectra (e.g., USRTRACK) at
arbitrary cooling times (see DCYTIMES, DCYSCORE).
hope this helps, cheers
Markus
> -----Original Message-----
> From: owner-fluka-discuss@mi.infn.it
> [mailto:owner-fluka-discuss@mi.infn.it] On Behalf Of me@marychin.org
> Sent: 22 August 2007 00:17
> To: Giuseppe Battistoni
> Cc: fluka-discuss@fluka.org
> Subject: Re: delayed (n, gamma)
>
> Hello Giuseppe,
>
> I do find the slideshow very useful, thank you for pointing
> out its existence. One question: if I 'trap' the variable
> ATRACK in usrdraw, do I get effectively the same time/age information?
>
> Thanks,
> mary
>
> --------------------------------------------------------------
> ------------------
> From: Giuseppe Battistoni [mailto:Giuseppe.Battistoni@mi.infn.it]
> Sent: Mon 16-Apr-07 08:23
> To: Chin MPW Dr (Physics)
> Cc: fluka-discuss@fluka.org
> Subject: Re: delayed (n, gamma)
>
>
> Hello Mary,
> Your question can be of general interest for many FLUKA users.
> I understand that your need is to look at the energy spectra
> of emitted radiation evolving in time after an irradiation
> producing isotopes.
>
> If this is the case then I think that a very useful
> complement to the existing FLUKA documentation, for you and
> many other users, is the the primer on radiation study with
> FLUKA presented by S. Roelser at one of the recent meetings
> of CERN users.
> Look at:
> http://info-fluka-discussion.web.cern.ch/info-fluka-discussion/
>
> and go to the link of the lecture of March 15th about
> "Radioactive Isotopes Production and Decay"
>
> Giuseppe Battistoni
>
>
> On Thu, 12 Apr 2007 M.Chin@surrey.ac.uk wrote:
>
> > Hi Giuseppe,
> >
> > Since my earlier email I have found the lines in FLUKA!
> Next, I'd like
> to get time-dependent spectra. E.g. I'd like to see the gamma
> spectrum after every x minutes. Any tip for doing this please?
> >
> > Thanks.
> >
> > ________________________________
> >
> > From: Chin MPW Dr (Physics)
> > Sent: Wed 11-Apr-07 22:02
> > To: Giuseppe Battistoni
> > Subject: RE: Fwd: delayed (n, gamma)
> >
> >
> > Hi Giuseppe,
> >
> > I'm looking for gamma lines such as:
> > 1.78 MeV from 27Al(n,g)28Al, half-life 2.3 m 0.847, 1.811 and 2.113
> > MeV from 55Mn(n,g)56Mn, half-life 2.6 h
> > 1.369 and 2.754 MeV from 23Na(n,g)24Na, half-life 15 h
> > 0.479 and 0.686 MeV from 186W(n,g)187W, half-life 23.9 h
> > 0.511 and 0.564 MeV from 121Sb(n,g)122Sb, half-life 28 d
> > 1.346 MeV from 63Cu(n,g)64Cu as well as 65Cu(g,n)64Cu,
> half-life 12.7
> > h
> > 0.511 MeV from 63Cu(g,n)62Cu, half-life 9.7 m
> > 1.378 and 1.92 MeV from 58Ni(g,n)57Ni, half-life 36 h
> >
> > Thanks very much.
> >
> > ________________________________
> >
> > From: Giuseppe Battistoni [mailto:Giuseppe.Battistoni@mi.infn.it]
> > Sent: Tue 10-Apr-07 09:19
> > To: me@marychin.org
> > Cc: fluka-discuss@fluka.org
> > Subject: Re: Fwd: delayed (n, gamma)
> >
> >
> >
> > Hi
> > Can you be a little bit more explicit on what you really
> would like to
> > know?
> >
> > If you mean delayed emission of neutrons:
> > it is true that we do not produce them in FLUKA, but there is no
> > particular difficulty behind that. Their inclusion is part of our
> > project of improvement of the neutron library and we hope
> to achieve
> > that goal, soon or later.
> >
> > If you are instead interested in gamma emission after
> neutron capture,
> > then this is already included in FLUKA.
> >
> > Giuseppe Battistoni
> >
> > On Mon, 9 Apr 2007, me@marychin.org
> > wrote:
> >
> > > Hello,
> > >
> > > I understand that FLUKA doesn't simulate delayed (n,gamma). Some
> > > other
> Monte Carlo codes don't simulate this either, although one is
> beginning to implement it. May I know why... is there any
> specific difficulty... what is the issue...
> > >
> > > 1. Cross sections availability? I thought the cross
> sections are known?
> > > 2. Implementation into sampling algorithm(s)?
> > > 3. The process being negligible? I imagine not.
> > >
> > > Just seeking some education. Thanks very much.
> > >
> > > :) mary
> > >
> >
> >
> >
> >
>
>
>
>
This archive was generated by hypermail 2.1.6 : Wed Aug 22 2007 - 20:42:51 CEST