The count rate for a particular a source X is C0 on a detector placed 1 m from the source. When a metal sheet of thickness 5mm is placed between source and counter the count rate drops by 75%. What is the value of the attenuation coefficient, μ, for this radiation and metal?

A certain technique calls for 50 mA and 0.1 s at 65 kV. If we have an uncooperative patient and wish to reduce motion by using an exposure time of 1/60 s, what will the new mA value be?  What is meant by the penetrating ability of an x-ray beam? How can the penetrating ability of a beam be changed?

Gamma rays typically have frequencies above 10 exahertz (or 10^19 Hz). What is the corresponding wavelength in units of picometers (pm) of a gamma ray with a 3*10^19 H? (1pm-10^-12m) Accessibility: Good to go Q Search F6 F7 F8 8 F9 F10 F11 F12 PrtSc

You are hired as an expert witness by the attorney representing a doctor. The doctor is being sued by a patient who claimed radiation damage from the doctor’s x-ray machine. The plaintiff argues that the machine must not have been properly shielded, exposing him to dangerous radiation. Your visit to the doctor’s office shows the following results. You do indeed measure x-radiation in the doctor’s office, with a minimum wavelength of 30.0 pm. Consultation with the doctor and inspection of his x-ray machine shows that it accelerates electrons through a voltage of 35.0 kV before they strike the target, producing bremsstrahlung. What advice do you give the attorney?