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

Mahmoud Aman Allah, Sabah; Amear Mahdyi, Saif; Jalal Fatahy, Sabah

doi:10.32894/kujss.2017.131335

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

Authors

Sabah Mahmoud Aman Allah

Saif Amear Mahdyi

Sabah jalal fatahy

10.32894/kujss.2017.131335

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.