Design And Shielding Effects Of Barium Silicate Glass For Radiation Protection

Currently, lead silicate glass is used for an observation window in medical facility.But lead is a certain toxic element, many governments and international organizationshave called and promote free-lead materials and process. Thus, lead glass shall bereplaced by a new environmentally friendly materials. Because both low-energyγ-rays and X-ray within150kV are used in the medicine facilities, high atomicnumber elements will be adulterated as a matter principle in shielding materials. Inthis paper, we find barium silicate glass can replace lead silicate glass. The main aimfocuses on synthesis of barium silicate glass and evaluation of shielding effect.Silicate glass has a high stability barium silicate glass form is selected. WinXcomand MCNP5program were employed to compare mass attenuation coefficient,half-value layer and lead equivalent barium oxide of different levels of barium glasswith lead glass and concrete. The shielding effect of barium silicate glass is better thanthat of lead silicate glass below80keV energy γ-ray and tube voltage of150kV X-ray,and lead equivalent of barium glass accord with shielding requirements.ICRP restricts annual maximum dose equivalent for professional staff, and thislimitation can be used as evaluation criteria of shielding effect. For evaluating humanbody dose change in different energy rays, MCNP code was employed to simulate bodyabsorbed dose rate and equivalent dose rate with muscle tissue depth change. Arealistic MIRD mathematical mannequin was used to simulate the equivalent dose rateof other organs and tissues such as the human bone marrow, pancreas for differentbarium oxide content, to calculate γ-ray impact on human body. Finally, barium glassof two centimeter thickness can shield below177keV γ–rays.In this thesis, frit furnace used to synthesize barium glass, and measure physicalproperties of barium glass by utilize XRD, DSC/TG and UV-Vis spectrometer. Thehigh-purity germanium detector was employed the shielding effect of barium glass byamericium and cesium source. This research found that predicted results of bariumglass radiation shielding effect consist with experimental results.