Determination of gamma-ray parameters for polyethylene glycol of different molecular weights  

作　　者：Ibrahim F. Al-Hamarneh Mohammad W. Marashdeh Fahad I. Almasoud Ahmad Alkaoud 

机构地区：[1]Department of Physics, Faculty of Science, Al-Balqa Applied University, Al-Salt 19117, Jordan [2]Department of Physics, College of Science, Al Imam Mohammad Ibn Saud Islamic University (IMSIU),Riyadh 11623, Saudi Arabia [3]Nuclear Science Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia [4]National Centre for Nuclear Technology (NCNT), King Abdulaziz City for Science and Technology (KACST),Riyadh 11442, Saudi Arabia

出　　处：《Nuclear Science and Techniques》2017年第11期180-187,共8页核技术（英文）

基　　金：Deanship of Scientific Research at Al Imam Mohammad Ibn Saud Islamic University for the grant and financial assistance to accomplish this work

摘　　要：Mass attenuation coefficient(μ_m) for polyethylene glycol(PEG) of different molecular weights was determined by using NaI(Tl) scintillator and Win Xcom mixture rule at gamma energies of 59.5, 302.9, 356.0, 661.7, 1173.2 and 1332.5 keV. The total atomic, molecular and electronic cross sections, half-value layer, effective atomic and electron numbers, mass energy-absorption coefficients and kerma relative to air are calculated. The energy and compositional dependence of μ_m values, and the related radiation absorption parameters, are evaluated and discussed. The experimental results agree well with the theoretical ones, within an uncertainty of 1% in the effective atomic number for all PEG samples at the designated energies.Mass attenuation coefficient (μ _m) for polyethylene glycol (PEG) of different molecular weights was determined by using NaI (Tl) scintillator and WinXcom mixture rule at gamma energies of 59.5, 302.9, 356.0, 661.7, 1173.2 and 1332.5 keV. The total atomic, molecular and electronic cross sections, half-value layer, effective atomic and electron numbers, mass energy-absorption coefficients and kerma relative to air are calculated. The energy and compositional dependence of μ _m values, and the related radiation absorption parameters, are evaluated and discussed. The experimental results agree well with the theoretical ones, within an uncertainty of 1% in the effective atomic number for all PEG samples at the designated energies.

关 键 词：POLYETHYLENE GLYCOL Mass ATTENUATION coefficient Effective ATOMIC number Electron density Kerma RELATIVE to air 

分 类 号：O632.31[理学—高分子化学]