Re: About internals for output file

From: Alberto Fasso' <fasso_at_SLAC.Stanford.EDU>
Date: Fri, 3 Jun 2011 07:11:43 -0700 (PDT)

Dear Hantao Jing,

you can find the explanation in the manual, Note 6 to USRBDX:

6) When scoring neutron fluence or current, and the requested energy bin
structure overlaps with that of the low energy neutron groups, bin
are forced to coincide with group boundaries and no bin can be smaller
than the
corresponding group. Actually, the program uses the requested energy
limits and
number of bins to estimate the desired bin width. The number of bins
above the
upper limit of the first low-energy neutron group is recalculated
according to
such width. Note that the lowest energy limit of the last neutron group is
1.E-14 GeV (1.E-5 eV) for the 260 data set. All group energy boundaries are
listed in two Tables in (10).


On Tue, 31 May 2011, Hantao Jing wrote:

> Dear FLUKA experts,
> The outputing results is in attachments.
> When I use USRBDX card with energy internals of 300 to score the
> all particles:
> *
> ..+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
> USRBDX -1.0 ALL-PART -49.0 TH4 NT2
> 1000.All22.0m
> USRBDX 3.0 1.0D-14 300.0 6.283185 0.0 1.0&
> From the results, I find the total internals are 560. The internal 1 to
> internal 260 is the low energy neutrons
> following the multigroup energy bins. So Is the results from internal 1
> to internal 260 just neutron yield?
> From the internal 261 to 518, I find the results is less to the results
> of low energy neutron. Is it mean the results
> from the internal 261 to 518 don't score the low energy neutron? Has
> the results greater than 20MeV already included the all
> particle? Because I want to score the neutron, all particles, neutral
> particles and comparing with them, the nonuniform internals trouble me,
> especially, the results from the internal 261 to 518! How to score the
> all particles or neutral particles in the uniform internals simply?
> Thank you very much!
> Hantao Jing
> 2011-5-31
Received on Sun Jun 05 2011 - 10:20:31 CEST

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