Using http://www.nndc.bnl.gov/exfor for fusion cross-section

chrismb · Post by **chrismb** » Sat Jun 05, 2010 8:55 am

Say you want p11B cross-section.

goto http://www.nndc.bnl.gov/exfor

check 'target', click the arrow to the right of the box, pick boron, pick B-11.

check the 'reaction' and pick (p,*) for B-11 being bombarded with protons. That way, all the possible reactions for p into B-11 come up.

check 'quantity' and select 'cross-section'

submit.

at the top of the next page, click 'all' and 'quick plot' then the 'retrieve' button.

You can go back and then be selective about the particular outcome you're interested in by selecting the relevant radio buttons, for example you might want to pay attention to the p+11B-> n + 11C reaction.

You can select the data from these, rather than the quick plot, and get the measured values along with the reference for the experiment that got that data.

D Tibbets · Post by **D Tibbets** » Sat Jun 05, 2010 2:05 pm

Thanks, lots of choices to play with. Um... Could you point me to the P-B11 reaction that leads to a gamma ray production. I believe it is something like B11 +P ---> C12 +gamma, but I didn't see that as a choice. I saw C12, but no mention of a gamma, unless it is represented by some other symbol.

Dan Tibbets

chrismb · Post by **chrismb** » Sat Jun 05, 2010 2:29 pm

D Tibbets wrote:Could you point me to the P-B11 reaction that leads to a gamma ray production.

So you would need to pick [or type] (p,g) for the reaction....

In terms of secondary reactions, it is more significant, I expect, to look at alpha-11B reactions, than p-11B minority reactions. (so you would select (A,*) for the reaction)

D Tibbets · Post by **D Tibbets** » Sat Jun 05, 2010 3:34 pm

chrismb wrote:
D Tibbets wrote:Could you point me to the P-B11 reaction that leads to a gamma ray production.
So you would need to pick [or type] (p,g) for the reaction....

In terms of secondary reactions, it is more significant, I expect, to look at alpha-11B reactions, than p-11B minority reactions. (so you would select (A,*) for the reaction)

Mm...
I tried
5-B-11(P,G)6-C-12,,SIG
which gave a single data point at ~ 150 KeV and 0.05 Barns. That is the only one I found in my brief search. That would be a gamma production rate of ~ 500X higher than the 1 in 10,000 rate that I recall being mentioned.

Dan Tibbets