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Forum: Hadronic Processes
Re: Question unrealistic result with Hadr02 (Robert Nnaemeka)
Re: Idea Re: unrealistic result with Hadr02 (Vladimir Ivanchenko)
Date: 19 Mar, 2015
From: Robert Nnaemeka <Robert Nnaemeka>

On Tue, 03 Mar 2015 10:31:46 GMT, Vladimir Ivanchenko wrote:
> Hello,
> Unfortunately, default EM models for ionization have an internal
> limitation: production threshold for delta-electrons cannot be below
> mean ionization potential. This limit is needed because models for
> differential cross section become not applicable.
> We have models which may work with zero threshold but for today they are
> applicable to liquid water (DNA) and for Silicon (MicroElec) only.
> So, there is no model for Molybdenum for production of very low-energy
> e-.
> VI

Hi Ivanchencho, When you talked about mean ionization potential, i didn't get it. But later I learnt the relationship between it and the maximum energy imparted to a free electron by hadron/ion. I did the calculation and realized the deuteron does not have enough energy to impart the electron energy at least the ionization potential of the metallic target. Deuteron energy is ~ 120 keV It is actually hadron ionization and OK in this group. One question: I want to simulate electron production using the deuterium threshold energy in Titanium of 214 keV and above. Then plot the values on a graph and extrapolate to the energy of deuteron of interest to me (~120 keV). What do you think of this method of going round this challenge? I am assuming it might be a smooth function and varies very slowly. Also, I found out that even at deuteron energy above the 214 keV that the mean number of liberated electrons are varies with low energy limit. In other words, in "/cuts/setLowEdge value", as I varies what is assigned to value from 1 eV to 100 ev, the mean electron produced also varies. I was expecting it to be constant since the mean ionization potential sets the threshold energy in this case. Any explanation.

Thanks very much.

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