Difference between revisions of "Pair Production Rate in Pair Spectrometer"
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(Created page with '[http://wiki.iac.isu.edu/index.php/PhotoFission_with_Polarized_Photons_from_HRRL Go Back] ==LINAC parameters used in calculations== 1) pulse width 50 ps <br> 2) pulse current 50…') |
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Revision as of 23:30, 29 January 2011
LINAC parameters used in calculations
1) pulse width 50 ps
2) pulse current 50 A
3) repetition rate 300 Hz
4) energy 44 MeV
Number of electrons/sec on radiator
Number of photons/sec out of radiator
Alex factor is 6.85 %
Pair production rate
out of Al converter
(by varying width we can vary the yield)
through 1 m of air
Assume air consists entirely from Nitrogen:
Appendix
pair production cross sections in an Al target
Ref. Geant4 and Theoretical Pair Production Cross Sections for 1 MeV - 100 GeV photons in Aluminum. Vakho Makarashvili, December 18, 2007
pair production cross sections in a Nitrogen
Ref. Photon Cross Section, Attenuation Coefficients, and Energy Absorption Coefficients From 10 keV to 100 Gev. J.H.Hubbell. Center for Radiation Research.National Bureau of Standards. Washington, D.C. 20234
Here I just plotted the table above for pair production cross section in (0, 40) MeV energy region