Open AccessThe determination of correction factors for free-air ionization chamber calculation using monte carlo method
Author(s) -
Pongphanot Rindhatayathon,
K. Koonkana,
Vithit Pungkun
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1719/1/012043
Subject(s) - kerma , ionization chamber , photon , monte carlo method , physics , ionization , atomic physics , electron , scattering , photon energy , compton scattering , diaphragm (acoustics) , computational physics , nuclear physics , optics , ion , dosimetry , nuclear medicine , medicine , statistics , mathematics , quantum mechanics , acoustics , loudspeaker
A free-air ionization chamber is used as the primary standard instrument for absolute measurement of air kerma for of X-ray beams. The evaluation of correction factors is a key importance for establishing the standard. Photon-scattering, and diaphragm transmission and scattering were taken into the accounts to reduce some photon phenomena. On the other hand, electron-loss factor which scatter from an electrode were used for electron compensates. In this research, Correction factors were calculated for each mono-energetic photon from 2 to 60 keV for low energy x-rays and 10 to 320 keV for medium energy x-rays by EGS5 code. The calculated corrections from a mono-energetic photon of W/Mo mammography x-rays were compared between effective energy and spectrum method. There is no significant difference between two methods.