Use of radioactive implants (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What type of radiation do radioactive implants deliver to tumours?
What type of radiation do radioactive implants deliver to tumours?
Beta radiation
Where are radioactive implants placed in relation to the tumour?
Where are radioactive implants placed in relation to the tumour?
Next to or inside the tumour
Why is beta radiation chosen for radioactive implants?
Why is beta radiation chosen for radioactive implants?
It has ionising properties
What is a key characteristic of beta particles' penetration depth?
What is a key characteristic of beta particles' penetration depth?
Limited penetration depth
Which isotope is commonly used in radioactive implants?
Which isotope is commonly used in radioactive implants?
Iridium-
What is the half-life of Iridium-?
What is the half-life of Iridium-?
days
What advantage do radioactive implants have over external beam radiotherapy?
What advantage do radioactive implants have over external beam radiotherapy?
Higher doses to smaller specific areas
Why do healthy cells further from the implant remain largely undamaged?
Why do healthy cells further from the implant remain largely undamaged?
Beta particles lose energy quickly
What is required of the radioactive material's half-life?
What is required of the radioactive material's half-life?
Long enough for therapeutic effect
What happens to healthy cells adjacent to a radioactive implant?
What happens to healthy cells adjacent to a radioactive implant?
Experience minimal radiation exposure