REVISION
SCIENCE TO
EXCEL
IN
A-LEVEL PHYSICS
A-levelPHYSICS7408/3BB Paper 3
A hospital uses the radioactive isotope technetium-99m as a tracer. Technetium-99m is produced using a Molybdenum-Technetium generator on site at the hospital.
Explain why the value of the half-life of technetium-9...
REVISION
SCIENCE TO
EXCEL
IN
A-LEVEL PHYSICS
A-levelPHYSICS7408/3BB Paper 3
A-levelPHYSICS7408/3BB Paper 3
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A-level
PHYSICS
Paper 3
Section B Medical physics
Time allowed: The total time for
both sections of this paper is
Materials
For this paper you must have: 2 hours. You are advised to
• a pencil and a ruler spend approximately
• a scientific calculator
• a Data and Formulae Booklet 50 minutes on this section.
• a protractor.
For Examiner’s Use
Instructions
Question Mark
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 1
• Answer all questions. 2
• You must answer the questions in the spaces provided. Do not write 3
outside the box around each page or on blank pages.
4
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 5
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Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 35.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*JUN2174083bB01*
IB/M/Jun21/E6 7408/3BB
, 2
Do not write
outside the
Section B box
Answer all questions in this section.
0 1 A hospital uses the radioactive isotope technetium-99m as a tracer. Technetium-99m
is produced using a Molybdenum-Technetium generator on site at the hospital.
0 1 . 1 Explain why the value of the half-life of technetium-99m:
• makes it suitable for use as a tracer
• means that it must be produced in a generator on site.
[4 marks]
0 1 . 2 Technetium-99m emits only gamma rays.
Explain why this makes technetium-99m suitable for use as a tracer.
[4 marks]
*02*
IB/M/Jun21/7408/3BB
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