A medical physicist is selecting a radioactive isotope to act as a diagnostic tracer to monitor renal clearance in a patient. The diagnostic imaging scan takes approximately 3 hours to perform, and the radiation detector is positioned externally to the patient.

Isotope	Radiation Emitted	Half-life
Isotope A	Gamma ( $γ\gamma$ )	$years15\text{ years}$
Isotope B	Gamma ( $γ\gamma$ )	$hours6.0\text{ hours}$
Isotope C	Beta-minus ( $β−\beta^-$ )	$days8.0\text{ days}$
Isotope D	Alpha ( $α\alpha$ )	$minutes2.5\text{ minutes}$

Which isotope is the most suitable for this procedure?

6.3 Nuclear equations and decay

Question 7

Markscheme

6.3 Nuclear equations and decay

Question 7

Markscheme

6.3 Nuclear equations and decay

Question 7

6.3 Nuclear equations and decay Questions

6.3 Nuclear equations and decay

Question 7

6.3 Nuclear equations and decay Questions