کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1888110 | 1533410 | 2015 | 6 صفحه PDF | دانلود رایگان |
• We measured energy spectrum of X-ray beam.
• We calibrate the Gafchromic films to measure air kerma of X-ray beam.
• Spatial air kerma rate is determined and interpreted.
• We define dimensions and position of future biological sample irradiation using Al Kα X-ray.
Ultrasoft X-ray characteristic aluminum K alpha line (Al Kα with energy of 1.5 keV) is used in radiobiological experiments to study the effect of radiation on biological matter. A simple method to generate a continuous beam of those X-ray radiations is to bombarding an aluminum target with accelerated electrons using high voltage (HV). In this work, by varying the HV we study the characteristics of a photon beam generated by means of a cold cathode transmission X-ray tube. The anode is a thin (16 μm) aluminum foil supported by a copper grid. The spatial distribution of air kerma is measured using gafchromic films of HD-810 calibrated with a parallel plate free-air ionization chamber. We show that HV strongly modifies the energetic spectrum and air kerma rate as well as its uniformity and intensity in air.
Journal: Radiation Measurements - Volume 80, September 2015, Pages 23–28