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Rhodium Thermal absorption cross section.

  1. Oct 12, 2011 #1
    Rhodium has been measured and the following values have been obtained for the resonance parameters of a well-isolated resonance Eo=1.26 ev , σo=5000 b , Γ = 0.156 ev , σs=5.5 b , Is there anyone can help me HOW to calculate the thermal absorption cross section ? I'm disparate I don't know how to do it.
    ..
    And if there's is a reliable up-to-date cross section information , I'm looking for the plot of Rh total cross section energy range from 0.2 to 40 ev ..
    Thanks , any help will be great.
     
  2. jcsd
  3. Oct 12, 2011 #2

    Astronuc

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    Staff: Mentor

  4. Oct 12, 2011 #3
    I can't find Rh-103 among them.
     
  5. Oct 12, 2011 #4

    Astronuc

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    If you see a periodic table, click on the box [45, Rh], and to the right, there should be some options to click on 103 properties.
     
  6. Oct 12, 2011 #5
    ..
    Thanks :)
     
  7. Oct 12, 2011 #6
    But is there any formula I can follow to calculate the thermal Absorption cross section for Rh-103 ?
     
  8. Oct 12, 2011 #7

    Astronuc

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    One could get the n,γ cross-section like this. Set the cutoff at whatever energy.
    http://www.nndc.bnl.gov/sigma/getPlot.jsp?evalid=4347&mf=3&mt=102&nsub=10

    There are options to download the cross-sections as a function of energy in a datafile.
    The interpreted option would give the data, or pick the option on that page.

    Then one could do a curve fit. In the thermal range, on the log-log scale, there's a 1/E dependency, so it's a 1/v absorber.
     
  9. Oct 14, 2011 #8
    I thought the dependency was 1/sqrt(E)?
     
  10. Oct 14, 2011 #9

    QuantumPion

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    Well since E ≈ v2... :redface:
     
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