I am getting the stop nonsense gas error when i define the material hydrogen with 400 g/cm3 as density and in material property card ionisation potential as 19.2eV. I dont know what i am missing out. how the steinhemer card has an effect on this. Please let me know. I am getting the above error.
Input files
Please upload all relevant files. (FLUKA input file, Flair project file, user routines, and data files)
I have tried to run a simple input adding the cards that you have reported and I confirm that the run with FLUKA4-5.1 aborts. Looking into it, I have found some possible problems that I need to clarify with you.
First, the Gas pressure entry in the MAT-PROP card should set in unit of atm (look at the MAT-PROP page of the manual). A pressure of 1.89e12 atm looks high in view of the 400 g/cm3 density of the Hydrogen. Could you confirm this pressure? Maybe the value is in unit of Pa rather than atm.
Secondly, as stated in the first part of Note 1 in the STERNHEIme card page of the FLUKA manual:
For gases the parameters are supposed to be given at 1.0 atm (NTP); the code takes care to scale them at the actual pressure as given by the MAT-PROP card.
Following what written, being H a gas at 1.0 atm, I would suggest to provide with the STERNHEIme card the values published by Sternheimer in At. Data Nucl. Data Tab. 30, 261-271 (1984). Since these are the same values used as default by FLUKA, this can be achieved simply disabling your STERNHEIme card.
As an example, with the setup reported in the following image (where simply the gas pressure is set as 1.86e8 atm and the STERNHEIme card has been disabled) the simplified input runs without problem.
