|Message: Photofission||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'm looking into how well G4 (10.1.p01 on OS X 10.10.5) describes photo-fission in the energy range of 6-15 MeV photons. I've played around with three reference physics lists (FTFB_BERT_HP, QGSP_BIC_HP, Shielding) and find all three to give very high neutron yields for photofission, something like 13 n/fission when it should be closer to 3-4. Neutron induced fission works reasonable well, both in neutron yield and cross section, for the couple of spot checks that I did. Does anyone have any suggestion what I could do to improve the generation of secondaries from photofission?
|Inline Depth:||Outline Depth:||Add message:|