Problem 1563

Summary:	Nuclear interaction length of liquid deuterium
Product:	Geant4	Reporter:	Markus Diefenthaler <mdiefent>
Component:	materials	Assignee:	Marc.Verderi
Status:	RESOLVED FIXED
Severity:	trivial	CC:	BryanMKerns, Vladimir.Ivantchenko
Priority:	P5
Version:	9.6
Hardware:	All
OS:	All

Description Markus Diefenthaler 2014-01-24 01:29:53 CET

For liquid deuterium, the function GetNuclearInteractionLength() returns a value of about 262cm. The Particle Data Group (PDG) stats a value of 424.7cm (the value has changed in the latest years): 

   http://pdg.lbl.gov/2013/AtomicNuclearProperties/HTML_PAGES/299.html 

Could you please update the value? Is there an user function to change the value (so that GetNuclearInteractionLength() returns the PDG values?

Comment 1 Marc.Verderi 2014-02-03 17:22:29 CET

*** Problem 1564 has been marked as a duplicate of this problem. ***

Comment 2 Vladimir.Ivantchenko 2014-05-12 20:13:52 CEST

Hello,

this value is not used in Geant4 tracking, this is only approximate value computed via trivial formula. May be used only for very qualitative estimations. 

To avoid confusions in the material printout a comment "not used" is added.

If true cross section or interaction length is needed, please, use G4HadronicCrossSectionStore() interface, see Hadr00 extended example.

VI

Comment 3 Marc.Verderi 2014-12-16 17:07:46 CET

Information needed to clarify the case has been provided.