Dear Zhefu Lee,
you are indeed very confused.
If, as you correctly say, a "star" is any high energy INELASTIC hadron interaction,
a"star" has nothing to do with ELASTIC scattering. Therefore there is nothing you
can calculate.
Star density is a quantity completely different from absorbed dose. However,
since in a first crude approximation (hadron energy > 50 MeV, constant inelastic
cross sections, photon and electron spectra negligible etc.) both quantities are
nearly proportional to hadron fluence, in a distant past there have been attempts
to estimate prompt Dose Equivalent (not Absorbed Dose!) from Star Density. See:
https://cds.cern.ch/record/168325/files/CERN-TIS-RP-173.pdf
On the other hand, also in a distant past, another crude approximation, applicable
only to a few materials, established a proportionality between Star Density and
gamma dose rate from materials irradiated by high energy hadrons. See the FLUKA
Manual (command THRESHOLd, Note 2 and References reported there [Ran70b,
Hof75a,Hof75b], and command SCORE, Note 3 and the Reference reported there [Tho88]).
Both such approximations are largely outdated now, since modern FLUKA
can calculate prompt Dose Equivalent and residual gamma dose rate directly and
in a much more accurate way.
Alberto
________________________________
From: owner-fluka-discuss_at_mi.infn.it <owner-fluka-discuss_at_mi.infn.it> on behalf of lzfneu <lzfneu_at_live.com>
Sent: Monday, September 21, 2015 1:16 AM
To: fluka-discuss_at_fluka.org
Subject: [fluka-discuss]: Question about star density
Dear all,
As is said in the manual, a "star" is any high energy inelastic hadron interaction.
now I have two questions to consult you :
1) how to calculate the star density including elastic scattering;
2) how to caluclate the star dansity of elastic scattering;
3) what is the difference between star density and absorbed dose;
I am confused about the questions, thanks in advance.
Zhefu Lee.
__________________________________________________________________________
You can manage unsubscription from this mailing list at
https://www.fluka.org/fluka.php?id=acc_info
Received on Mon Sep 21 2015 - 16:20:56 CEST