Re: [fluka-discuss]: Unequal value of alpha and Lithium in RESNUCLEi

From: Paola Sala <paola.sala_at_mi.infn.it>
Date: Mon, 22 Jun 2015 10:44:20 +0200

Dear Meghnath Sen,
with the Resnuclei card you will see all the residuals that REMAIN in the
detector voulume. Part of the generated alphas and lithium ions will
escape from the target into the surrounding vacuum. Being the alphas
lighter and more energetic, they will have a larger probability to escape,
hence the difference in resnuclei.
You can convinve yourself, for instance, with a USRYIELD card scoring
all-part exiting from target to void in units of charge, such as:
USRYIELD 122. ALL-PART -25. TARGET VOID
USRYIELD 10.5 0.5 10. 1. 0.0 3. &
You'll find the difference there.
Regards
Paola
> Dear Fluka experts,
> I am using RESNUCLEi card to find out the number of
> Lithium and alpha produced in a spherical volume
> (filled with BF3 gas having density of 9.85e-4 g/cc,
> 100% B-10) for the thermal neutron (0.025 eV). But the
> (number of alpha/primary /cc) and (number of
> lithium/primary /cc) are coming different. The number
> of alpha is less (by 20% approximately) than that of
> lithium. Using PHYSICS (COALESCE and EVAPORAT) card
> also the results are coming same. What I understand
> is that the numbers should be same. Input files with
> the associated results are attached below.
> [The fluka version used is “fluka2011.2c-linuxAA.tar.gz” in flair].
Any help will be heartily appreciated..
>
> Thanks,
> Meghnath Sen
> BARC, INDIA
>


Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148



Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148

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Received on Mon Jun 22 2015 - 12:27:48 CEST

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