How Can U-238 Cross Section Be Accurately Modeled in the Resonance Region?

Click For Summary
SUMMARY

The discussion focuses on accurately modeling the effective absorption cross section of Uranium-238 (U-238) in the resonance region for neutron energies between 1 eV and 10 keV. Users have noted the complexity of U-238's resonance behavior and the inadequacy of MS Excel for fitting tabulated data of energy versus cross section. References to resonance escape probabilities in light water reactors and a detailed paper by E. Hellstrand from 1957 provide additional context and resources for further exploration.

PREREQUISITES
  • Understanding of neutron interaction cross sections
  • Familiarity with resonance region physics
  • Proficiency in data analysis tools, specifically MS Excel
  • Knowledge of nuclear reactor physics, particularly light water reactors
NEXT STEPS
  • Research advanced data fitting techniques beyond MS Excel
  • Explore the resonance escape probability calculations in nuclear reactors
  • Study the detailed findings in E. Hellstrand's 1957 paper on U-238
  • Learn about computational tools for modeling nuclear cross sections, such as MCNP or GEANT4
USEFUL FOR

Nuclear physicists, reactor engineers, and researchers involved in neutron transport and cross section analysis will benefit from this discussion.

Nucengable
Messages
42
Reaction score
0
Hello , I was trying to calculate the effective absorption cross section ( group constant) of U-238 in the resonance region between neutron energies (1 ev - 10 kev) but as you can see from the picture U-238 has a lot of resonance at this region, I was wondering if there is a way I can obtain U-238 cross section as function of energy in this region, I was trying to fit the tabulated data of the energy vs cross section (barn) using MS EXCEL but it was incapable to give me an accurate fit. any help would great...

[url=http://www.0zz0.com][PLAIN]http://www3.0zz0.com/2012/05/04/19/327609909.png[/url][/PLAIN]


Thanks.
 
Engineering news on Phys.org
Resonance escape probabilities for typical light water reactors are 0.90 or so;
http://t2.lanl.gov/data/n7-pdf/u/238.pdf shows how complex this region is for U238, and It seems a detailed paper was done by E Hellstrand in 1957
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5121844&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5121844
 

Similar threads

Rhodium Thermal absorption cross section.
  • · Replies 8 ·
Replies
8
Views
5K
Capture Cross Section for a Neutron
  • · Replies 1 ·
Replies
1
Views
3K
Graduate How Does Solid Hydrogen Impact Our Understanding of Cosmology?
  • · Replies 5 ·
Replies
5
Views
4K