|Message: Cascade gammas from excited 12C||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 am trying to create excited 12C nuclei as primary particles, so that I can get the subsequent cascade gammas. I am using GPS and the GRDM. Here are the commands I use:
UI->ApplyCommand( "/gps/ion 6 12 0 4439" ); UI->ApplyCommand( "/grdm/nucleusLimits 12 12 6 6" );
When I do this, I get the excited carbon nuclei, but no cascade gammas. In the SteppingAction, I print out the identity of the particles that are created, and then kill the track only if it's a beta or gamma. Here is the output:
Created a 0-keV C12[4439.0]
If I set the energy state to 4440 keV, the 12C still does not relax to the ground state.
When I try to do the same with excited 137Ba, though (as though from the decay of 137Cs) using the commands
UI->ApplyCommand( "/gps/ion 56 137 0 662" ); UI->ApplyCommand( "/grdm/nucleusLimits 137 137 56 56" );
I get the output
Created a 0-keV Ba137[662.0] Created a 661.998-keV gamma Created a 0-keV Ba137[0.0]
I get the 662 keV gammas out, and GEANT4 tracks the ground-state barium nucleus.
Does anybody have an idea of how to get the carbon nuclei to properly relax to the ground state?
Thanks for any and all help.