Barium-133 is a radioactive element used in certain medical procedures. A sample of pure Barium133 has a mass of 18.000 grams. Determine the activity of the sample 47 years after it was created, in units of Curies.
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Barium-133 is a radioactive element used in certain medical procedures. A sample of pure Barium133 has a mass of 18.000 grams. Determine the activity of the sample 47 years after it was created, in units of Curies.
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- What is the activity (in particles/s) of a sample of Carbon-14 that contains 4.109E+21 nuclei?After 1.80 days, the activity of a sample of an unknown type radioactive material has decreased to 80.4% of the initial activity. What is the half-life of this material?The half-life of Ra-226 is 1.60 x 10^3 years = 5.05 x 10^10 s Find k What is the activity in curies of a 1.00 g sample? What is the mass in grams of a Ra-226 sample that has an activity of 1.00 x 10^9 atoms/min?
- Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% 232Th, with a half-life of 1.405 x 10¹0 y. If an average lantern mantle contains 270 mg of thorium, what is its activity (in Bq)? XBq tThe half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. 2.1x10-65-¹ ✓ (b) What percentage of a sample remains undecayed after two weeks (1.21 x 106 s)? %The decay chain of uranium includes radon, a noble gas. When uranium in the soil decays to radon, it may seep into houses; this can be a significant source of radiation exposure. Most of the exposure comes from the decay products of radon, but some comes from alpha decay of the radon itself. If radon in the air in your home is at the maximum permissible level, the gas in your lungs will have an activity of about 0.22 Bq. Each decay generates an alpha particle with 5.5 MeV of energy, and essentially all that energy is deposited in lung tissue. Part A Over the course of 1 year, what will be the dose equivalent in Sv to the approximately 0.90 kg mass of your lungs? Express your answer in millisieverts per year. ΕΧΕΙ ΑΣΦ dose equivalent = ? mSv/yr