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Forum: Hadronic Processes
Re: None internal conversion process with example of radioactivedecay(exrdm) (Yeongduk Kim)
Date: 09 Feb, 2011
From: Carlos Montes <Carlos Montes>

Hi all,

I am working with Geant 4.9.3.p01 and Radioactive Decay Module and I have the same problem as Yeongduk reported three years ago.

Reading the physics manual it says on section 12.9 (Electron ionisation): “The interaction leaves the atom in an excited state. The deexcitation of the atom is simulated as described in section 12.10.” And on section 12.7.2 (Photoelectric effect): “The interaction leaves the atom in an excited state. The deexcitation of the atom is simulated as described in section 12.10.” But it does not say anything about atomic deexcitation on the internal conversion section (31.7).

Therefore I think that G4 does not emit X-rays (atomic relaxation) after an internal conversion process. I would like to know if it is on development or it is a bug. In the second case, have I to report it somewhere?.

Thank you,

Carlos MF

On Wed, 05 Sep 2007 04:26:47 GMT, Yeongduk Kim wrote:

> Hi,
> 
> I have a problem in my simulation of radioactive decay of radioisotope.
> If I use Pb-210 for primary ion, the sum energy of secondaries from
> initial beta decay of Pb-210 doesn't match with the Q-value(63.1keV) It
> seems that some x-ray after internal conversion is not produced.
> 
> I am using Geant4.8.0.p1, and the example of exrdm in radioactivedecay.
> Below is some output from tracking of one decay.
> 
>  ----- End List of DecayProducts  -----
> 
>     2        0        0 1.37e-10         0        0        0  3.07e-09      Target RadioactiveDecay
>     :----- List of 2ndaries - #SpawnInStep=  4(Rest= 4,Along= 0,Post= 0), #SpawnTotal=  4 ---------------
>     :         0         0  1.37e-10  3.97e-09         Bi210[0.0]
>     :         0         0  1.37e-10    0.0302                 e-
>     :         0         0  1.37e-10     0.015          anti_nu_e
>     :         0         0  1.37e-10    0.0016                 e-
>     :----------------------------------------------------------------- EndOf2ndaries Info ---------------
> 
> According to the physics reference manual, the atomic deexitation
> process should be followed and the internal conversion process should be
> properly handled.
> 
> Can anyone comment on this ?
> 
> Thank you.

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1 None: Re: internal conversion process with example of radioactivedecay(exrdm)   (michel maire - 10 Feb, 2011)
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