Chapter 7 📊 Flashcards
Which of the following are non ionising radiation? Beta Ultrasound Infrared Light Gamma rays X-rays
Light
Ultrasound
Infrared
What is someone who works with x rays called?
Radiographer
What radiation is used in an endoscope?
Light
How does light travel through an endoscope?
Total internal reflection
What radiation do CAT scans use?
Xrays
Ionising radiation is used to…
Treat cancer
Uses of ultrasound
Scan babies
Detect lumps
Break up kidney stones
What is released when fission takes place?
2 or 3 neutrons and energy
What radiation is produced when nuclear fission takes place?
Gamma radiation
What are the two smaller nuclei formed when fission occurs called?
Fission fragments
What are the most common substances used in fission reactors?
Uranium-235 and plutonium-239
What is gamma radiation?
High energy electromagnetic radiation
What is the charge of gamma radiation?
0
Mass of gamma radiation
0
Ionising power of gamma radiation
Very weakly ionising
What does it take to stop gamma rays?
A few centimetres of lead or several metres of concrete
What is a beta particle?
A high energy electron
Charge of beta particle
-1
Mass of a beta particle
Very small (1/1860)
Ionising power of beta particle?
Weakly ionising
How to stop beta radiation?
Few mm of aluminium
What is an alpha particle?
2 neutrons and 2 protons
Charge of alpha particle?
+2
Mass of an alpha particle?
4
Ionising power of alpha particle?
Strongly ionising