Investigation of the Implantation profile and average stopping depth of slow positrons in Magnesium Sulfide MgS

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Abstract

In this paper ,we present for the first time , the theoretical values of Implantation profile I(z,E) and average stopping depths z0 of slow positron (1.5-30)keV for Magnesium sulfide MgS and different thicknesses(0.2-1.6) μm by employing a Makhovs distribution function has been investigated . The obtained results reveals that the shape of the Makhov,s profile indicates to the energy spectrum of the incident positrons ,the average stopping depth are small for low energies , this due to the probability of backscattering positrons at the surface of material and thus the result is a narrow annihilation region which represented by the high values of I(E,z), this behavior is due to the multiple scattering elastic and inelastic during the slowdown process inside material , the average stopping depths increased .The present study in accordance with the results of that for other works of elements and compounds.
Kirkuk Journal of Science
Volume 12, Issue 3
September 2017
Page 277-289

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History

  • Receive Date: 01 September 2017
  • Revise Date: 20 September 2017
  • Accept Date: 25 September 2017

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