Re: Secondary Alpha and Recoil Nuclei

Hello Fawaz,

> Is this because FLUKA does not transport these particles?

*I assume you mean heavy ions. FLUKA does transport them if the user:
- requests so via the IONTRANS card; or
- asks for an ion beam.

> Is this because ...

*No. Even without ion transport activated, ions are ranged out and the
energy IS always deposited.

> I am applying the DETECT card
> I am seeing the protons but I am not seeing the alpha and C, O, N

*How do you "see protons but not alphas, C, O, N" in the DETECT output?

Residual nuclei are typically scored using the RESNUCLEi card.

Energy deposition can be scored not only using DETECT but also USRBIN.
DETECT is for (anti-)coincidence, trigger and/or pulse-height spectrum
(i.e. multiple energy depositions resulting from the same primary are
summed as one count). USRBIN is generally more versatile.

If you really need to see each recoil in action, then mgdraw would be the
user routine to go for.

:) mary

On Thu, 17 May 2012, Fawaz Ali wrote:

> Hello Everyone,
>
> I am performing a simulation whereby low energy neutrons (with kinetic
> energy on the order of keV) are irradiating a target. I am applying the
> DETECT card to the sensitive volume of the target and I am expecting to
> see the following secondary particles which will contribute to the
> counts vs. energy deposited spectrum: protons, alpha, and recoil Carbon,
> Oxygen, and Nitrogen nuclei (note that I have set their respective
> transport thresholds down to 1 keV). I am seeing the protons but I am
> not seeing the alpha and C, O, N recoil nuclei. Is this because FLUKA
> does not transport these particles? Would I have to go into the
> USERDUMP tape to find the kinetic energy they deposit in the sensitive
> volume?
>
> I appreciate any help that can be provided.
>
> Thanks,
> Fawaz
>
>
Received on Fri May 18 2012 - 12:06:55 CEST