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Threshold energy,cross section of incident proton on oxygen-18

  1. Dec 25, 2013 #1
    Dear Forum:

    I would like to know where could I find
    charged particle interaction cross section for oxygen-18?
    I know I can get some of it from ENDF.
    https://www-nds.iaea.org/exfor/endf.htm

    Where can I get reference,like the threshold energy for 18O(p,n)18F is 2.5MeV and its cross section.
    https://www-nds.iaea.org/medical/o8p18f0.html

    How can I get the threshold energy and cross section and reference of them.
    p + O18 -> O17 + n + p
    p + O18 -> N14 + n + alpha

    or after 5MeV, 10MeV, 20 MeV different reaction will happen ?
    thanks
     
  2. jcsd
  3. Dec 26, 2013 #2

    mfb

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    2016 Award

    Staff: Mentor

    The threshold energy is just energy (+momentum if you want to be precise) conservation.
    I have no idea about cross-section sources for various energies.
     
  4. Dec 26, 2013 #3

    Astronuc

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    Staff: Mentor

    I believe one has identified the key source for such information. O-18 is relatively rare, 0.205% of natural oxygen. I believe one will have to go to the literature to find cross-sections and thresholds for p,n reactions.
    https://www-nds.iaea.org/medical/o8p18f7.html
     
  5. Dec 26, 2013 #4
    Thanks.
    I know that O-18 is a relatively rare element, so it's not easy to find information about it.
    Considering the most general one like O-16 in water,
    how could I know what kind of nuclear reaction will occur if charged particle like proton interact with it.
    There is 16O(p,a)13N.
    https://www-nds.iaea.org/medical/o6p13n0.html
    How to get information about if the incident proton energy is 10MeV, 20MeV.
    What other kinds of nuclear reaction occurs ?
     
  6. Dec 27, 2013 #5

    Astronuc

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    Staff: Mentor

    I believe one has to go to the literature, most likely articles on cosmic radiation or solar protons and their interactions in the atmosphere.

    Brookhaven National Laboratory publishes cross-section data.

    http://www.nndc.bnl.gov/sigma/

    One can then select particular reactions and databases, e.g.,
    http://www.nndc.bnl.gov/sigma/index.jsp?show=nd.3&as=16&lib=jendl3.3&nsub=10010
     
  7. Dec 27, 2013 #6
    Astronuc , thanks for your response.
    I select all of the 8 library to find proton interaction with O-16,
    but it seems that I can not even find 16O(p,a)13N out of it.
     
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