|Message: Re: unrealistic result with Hadr02||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
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.