Problem 1918 - momentum non conservation in particle_hp elastic
Summary: momentum non conservation in particle_hp elastic
Status: RESOLVED FIXED
Alias: None
Product: Geant4
Classification: Unclassified
Component: processes/hadronic/models/neutron_hp (show other problems)
Version: 10.2
Hardware: All All
: P5 trivial
Assignee: dennis.herbert.wright
URL:
Depends on:
Blocks:
 
Reported: 2016-11-20 00:49 CET by Artem Zontikov
Modified: 2019-04-17 19:10 CEST (History)
1 user (show)

See Also:

Attachments
bug report (858.56 KB, application/pdf)
2016-11-20 00:49 CET, Artem Zontikov 		Details
bug report 2 (846.95 KB, application/pdf)
2016-11-21 15:30 CET, Artem Zontikov 		Details
bug report 3 (65.02 KB, application/pdf)
2016-11-21 23:23 CET, Artem Zontikov 		Details
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Description Artem Zontikov 2016-11-20 00:49:53 CET 
Created attachment 427 [details]
bug report

attached
Comment 1 Artem Zontikov 2016-11-21 15:29:47 CET 
I forgot to transform theTarget momentum from the reaction plane back to LAB and therefore overcomplicated the situation. G4ParticleHPElasticFS has nothing to do with the results, and the whole problem is caused by G4HadronElasticProcess. Magnitude of the momentum vector is conserved but the direction is not. Here is the revised calculations.
Comment 2 Artem Zontikov 2016-11-21 15:30:28 CET 
Created attachment 428 [details]
bug report 2
Comment 3 Artem Zontikov 2016-11-21 23:23:13 CET 
Created attachment 429 [details]
bug report 3
Comment 4 dennis.herbert.wright 2019-04-17 19:10:41 CEST 
Fixed in version 10.5 by using correct Lorentz frame transformations for scattering from nucleus with thermal motion.