|Message: Re: angular distribution for photonuclear reaction||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)|
thanks for your answer. I am actually interested in 2H(gamma,n) reaction at low energies (GDR region). I have found that Geant4 uses a parametrization for the cross section based on the cross sections of 14 nuclei from the ENDF database. Is there some angular distribution coded in Geant4 for my specific reaction? If yes, how is it done?
On Tue, 13 Mar 2012 21:18:14 GMT, Dennis H. Wright wrote:
> Photo-nuclear physics below about 3 GeV is currently handled by the > CHIPS (Chiral Invariant Phase Space) model, which is covered in the > Physics Reference Manual. However, there is no specific description > there of the angular distribution. In the CHIPS model, the gamma is > absorbed on clusters within the nucleus which may then disintegrate. The > products of the disintegration then re-scatter until they escape the > nucleus or are absorbed. For the most part Geant4 does not handle the > low-lying nuclear levels with specific angular momentum, so angular > distributions will not reflect specific quantum numbers. Exceptions to > this are the high precision neutron models and radioactive decay. >
|Inline Depth:||Outline Depth:||Add message:|