detecting radioactivity

I am doing a project 4 Physics and i can't find enough stuff on photographic material, i was hoping u could send me some stuff, its for standard grade(credit)/gcse

Decay of radioactivity

I have 10000000000 Bq (bequerel) of I-123 in 2 cc of saline on Monday at 8 Am a) What is the concentration at 8Am b) What volume should I inject on Monday at 8Am if I wish to inject 40 Mbq c) What volume should I inject on Tuesday at 8AM if I wish to inject 60 MBq d) After the injection on Tuesday, what activity of I-123 is left?

Electron Shielding

You are a radiation scientist working for the space agency. A Mission Coordinator asks you to design shielding to prevent monoenergetic 10 MeV electrons from interacting with a cell culture that is to be flown on an upcoming space shuttle mission. The cell culture is covered with a 1 cm thick sheet of Lucite (density = 1.19 g/cm^3) - see figure below. a) What thickness of lead (in cm) is required on top of the Lucite to prevent the 10 MeV electrons from reaching the culture? b) The Mission Coordinator assumes that when the electrons are shielded out, that there will be no other radiation sources interacting with the cell culture. Assuming that your spacecraft is shielded from all other... click for more

Neutron Absorption

What thickness of cadmium is required to absorb 50% of an incident beam of thermal neutrons? Given: σ_capture = 2550 barns, ρ=8.65 g cm^-3, MW=112.4.

Pocket Ionization Chamber

Pocket ionization chambers are built in the form of an electrical capacitor. You know that capacitance is equal to a change in charge over a change in voltage, as C = ∆Q/∆V, where the capacitance, C, is in Farads (F), the voltage, V, is in volts (V) and the charge, Q, is in coulombs (C). You have a chamber that has a sensitive cylindrical volume of radius of 0.635 cm and length 6.35 cm. The standard density of the air in the chamber is 0.001293 g/cm^3. The chamber is calibrated such that its quartz fibre has full deflection when there is 50 µC per kg of air. The capacitance of the chamber is 10 pF. a) If it takes 200 Volts to charge the chamber, what is the voltage in t... click for more