HW Chemical Dose Week 7
\nHW Chemical Dose Week 7
\n1. Calculate the dose rate and the absorbed dose for the Fricke
\ndosimetric solution that was irradiated with Co-60 source during 3
\nhrs. The absorbance of the irradiated dosimetric solution (Fe3+),
\nmeasured with UV\/Vis-spectrophotometer in 1 cm cuvettes at the
\nwavelength =304 nm, increased from 0.01 (initial) to 0.203
\n(irradiated). The molar absorptivity of ferric ions for this
\nwavelength is \u03b5304 = 2187 L mol1cm1, the density of the
\ndosimetric solution is \u03c1=1.024 g\/mL, and the tabulated radiation
\nchemical yield for gamma source 60Co is 1.6 \u00b5mol J1.
\nA = \u03b5cl
\n2. Calculate the dose rate and the absorbed dose for the ceric
\nsulfate dosimetric solution that was irradiated with Co-60 source
\nduring 3 hrs. The absorbance of the irradiated dosimetric solution
\n(Ce4+), measured with UV\/Vis-spectrophotometer in 1 cm
\ncuvettes at the wavelength =320 nm, decreased from 1.01 (initial)
\nto 0.21 (irradiated). The molar absorptivity of ceric ions for this
\nwavelength is \u03b5320 = 561 L mol1cm1, density of the dosimetric
\nsolution is \u03c1=1.025 g\/mL and the G value for the cerous-ion yield is
\n2.3 molecules\/100 eV for the gamma source 60Co.
\n3. Estimate the effect of alpha-autoradiolysis in the acidic aqueous
\nsolution of 239Pu with concentration of 0.03 mol\/L of 239Pu:
\na) Considering the half-life T1\/2=24111 y (=7.60364\u00d71011 sec) and
\nthe alpha energy of 5.24 MeV, what is the weekly dose absorbed in<\/p>\n","protected":false},"excerpt":{"rendered":"
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