|Message: tot (p+12C) non elatic XS is very law||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)|
I use Hadr03 example to calculate (proton+Carbon) total non-elastic reaction cross section. An event is killed at the first interaction of the incident Proton. Target is 12Carbon (infinite length to be sure that interaction occurs at any events ). First mean free path is calculated and then XS/volume is calculated by (1/meanfreepath). Finally XS/Atom is calculated using following equation
XS/Atom =(XS/Volume)*(M/(density*Avogadro number))
My Physics list
AddPhysicsList("standard_opt3"); hadronPhys.push_back( new HadronPhysicsQGSP_BIC()); hadronPhys.push_back( new G4EmExtraPhysics()); hadronPhys.push_back( new G4HadronElasticPhysics()); hadronPhys.push_back( new G4StoppingPhysics()); hadronPhys.push_back( new G4IonBinaryCascadePhysics()); hadronPhys.push_back( new G4NeutronTrackingCut());
XS/Atom values in the low energy are very lower than the actual values (ple see the attachment).
The XS/atom is strongly depend on density of target material. How can I solve it? I would greatly appreciate your helps.
Thanks in advance
with regards Sugi
|Inline Depth:||Outline Depth:||Add message:|