Radioactivity HW 1 How can the element 106 (seaborgium) in general be produced? What makes 14C famous? What is the medical importance of 18F? Comment on 152Dy. How can its gamma decay be measured? Radiation Detection and Measurement, JU, 1st Semester, 2008-2009 (Saed Dababneh).

Radioactivity Statistical HW 2 ≡ decay constant. Compare to human life time!!! ≡ decay constant. It does not change with time, and does not depend (to a good approximation) on any environmental factors. (It does in extreme cosmic conditions. How?). HW 2 Radiation Detection and Measurement, JU, 1st Semester, 2008-2009 (Saed Dababneh).

Radioactivity Krane Ch 6 Show that the mean lifetime . N is difficult to measure. Instead, measure N ≡ number of decays between t and t +t: If t <<  (i.e. << t1/2) then show that and thus defining the activity A(t): Slope=? !!!!!!!!!! Be careful. Radiation Detection and Measurement, JU, 1st Semester, 2008-2009 (Saed Dababneh).

Radioactivity HW 3 Krane Problem 6.1 Radiation Detection and Measurement, JU, 1st Semester, 2008-2009 (Saed Dababneh).

Radioactivity Activity measured in units of becquerel (Bq) = 1 decay/s. 1 curie (Ci) = 3.7 x 1010 Bq. Activity is not dose!!!!! Isotope 1 (initial number N0) decays into “stable” isotope 2: In order to measure  using the exponential decay curve: The half-life should be not too long; we need to see the sample decaying!!! Actually we can use provided this information is available. The half-life should be not too short; we need to do a series of measurements!! But there are other alternatives!! 1 should not be produced, 2 should not be radioactive. Krane 7.8 Radiation Detection and Measurement, JU, 1st Semester, 2008-2009 (Saed Dababneh).

Exponential decay of species 1 and exponential growth of species 2. Radioactivity Exponential decay of species 1 and exponential growth of species 2. Radiation Detection and Measurement, JU, 1st Semester, 2008-2009 (Saed Dababneh).

Radioactivity 56Mn 847 keV In order to measure t1/2 when it is not too long and not too short compared to practical experimental time, use the exponential decay curve. Are they in cascade? Coincidence summing!! 1811 keV Radiation Detection and Measurement, JU, 1st Semester, 2008-2009 (Saed Dababneh).