Coulomb Scattering

*Coulomb Scatteringbdrminvovmin Elastic or inelastic. Elastic Rutherford scattering. At any distance:V = 0Ta = mvo2l = mvobNo dependence on Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Nuclear and Radiation Physics, BAU, Second Semester, 2009-2010 (Saed Dababneh).* Closest approach d. E = ECoulomb d = 2kZe2/E What about the recoil nucleus? HW 9 Show that

where mN : mass of the nucleus m : mass of alpha

What are the values of d for 10, 20, 30 and 40 MeV on Au?How does this explain ?Coulomb Scattering

Nuclear and Radiation Physics, BAU, Second Semester, 2009-2010 (Saed Dababneh).

*Coulomb ScatteringAccelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).


*Coulomb Scatteringn target nuclei / cm3 x target thickness (thin).nx target nuclei / cm2b < b > db dbHW 10Show thatand henceRutherford cross sectionAccelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).


*Coulomb ScatteringStudy Fig. 11.10 (a,b,c,d) in KraneHW 11Show that the fraction of incident alpha particles scattered at backward angles from a 2 m gold foil is 7.48x10-5.See also Fig. 11.11 in Krane.Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).


Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).*Coulomb Scattering RBS Channeling. Ion implantation. Occupational or substitutional impurities.


*Coulomb Scattering Elastic Rutherford scattering. Inelastic Coulomb excitation.See the corresponding alpha spectrum of Fig. 11.12 in Krane.Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).


*Coulomb ScatteringAccelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).


Excitation Ionization ion-pair, suppress recombination in detectors.

Energy lossAccelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).*Interaction of heavy charged particles Electronic or nuclear (Rutherford, nuclear reactions, ) or radiative (Bremsstrahlung). Depletion layer. Delta rays and secondary electrons. Electron suppression for charge integration in accelerators. Faraday Cup. Tracks.Detectors mainly designed to make use of electronic interactions.SRIMhttp://www.srim.org Principles of SpectrometryAl in Al?


Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).*Stopping power Bethe-Bloch formulaMinimum ionizing particles (mip).~1/EPrinciples of Spectrometry~1/E


Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).* eV / keV / m MeV / mm keV / (g/cm2) MeV / (mg/cm2) keV / (mg/cm2) eV / (1x1015 atoms/cm2)Units

(conversion)You will encounter this when you run SRIMPrinciples of Spectrometry


Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).*Electron pick-up.~1/EWhat about fission fragments?????Bragg curve Energy loss is a stochastic process, thus energy straggling.Principles of SpectrometryTargetAccelerated beam


Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).*Hadrontherapy


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Coulomb Scattering

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