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None Example Hadr04: Missing conversion electrons in 10.1.p02 

Forum: Hadronic Processes
Date: 03 Sep, 2015
From: Dorothea Pfeiffer <Dorothea Pfeiffer>

Hi,

I'm simulating the neutron capture of thermal neutrons on Gd. Up to version 10.1, conversion electrons were correctly produced when setting the flag setenv G4NEUTRONHP_USE_ONLY_PHOTONEVAPORATION=1, from version 10.1.p01 this is not the case, just the prompt gammas are emitted.

The problem can be reproduced on lxplus with example Hadr04 and the run01.mac file that I attached. In the CMakeList.txt (also attached) I added the four lines: set(CMAKE_CXX_COMPILER "g++") set(CMAKE_C_COMPILER "gcc") set(CMAKE_CXX_FLAGS "-std=c++11") set(CMAKE_C_FLAGS "-std=c++11")

My environment settings are in cshrc.txt.

Running Hadr04 with Geant4 10.1 I get the following output:

************************************* The run is 100 neutron of 25 meV through 50 cm of Gd (density: 7.9 g/cm3 )

Process calls frequency :
	nCapture= 100

List of generated particles:
          Gd156:     100  Emean =  39.964 eV 	( 1.3963 eV  --> 220.04 eV )
             e-:     132  Emean =   132.5 keV	( 38.724 keV --> 649.84 keV)
          gamma:    1211  Emean =  690.46 keV	( 7.2429 keV --> 5.2223 MeV)

On Geant4 10.1.p02:

************************************ The run is 100 neutron of 25 meV through 50 cm of Gd (density: 7.9 g/cm3 )

Process calls frequency :
	nCapture= 100

List of generated particles:
          Gd156:     100  Emean =  126.37 eV 	( 8.0191 eV  --> 238.11 eV )
             e-:       1  Emean =  602.13 keV	( 602.13 keV --> 602.13 keV)
          gamma:     299  Emean =  2.8528 MeV	( 481 keV --> 5.7787 MeV)
*************************************

The list of the generated particles and the Emean are totally different!

Cheers

Dorothea

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1 None: Re: Example Hadr04: Missing conversion electrons in 10.1.p02   (Dorothea Pfeiffer - 07 Sep, 2015)
2 None: Re: Example Hadr04: Missing conversion electrons in 10.1.p02   (michel maire - 17 Sep, 2015)
1 None: Re: Example Hadr04: Missing conversion electrons in 10.1.p02   (Dorothea Pfeiffer - 18 Sep, 2015)
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