- A generator type 99 42Mo-99m 43 Tc has an activity of 12.0 GBq on Monday at 8:00 a.m. By Thursday at 8:00 a.m., the 99

[answerhappygod]

- A generator type 99 42Mo-99m 43 Tc has an activity of 12.0 GBq
on Monday at 8:00 a.m. By Thursday at 8:00 a.m., the 99m 43 Tc is
fully mined. On that same day, the 99m
43 CT. By mistake, the elution time was not recorded. 99m 43 Tc
activity is recorded at 4:00 p.m. with a value of 2.10 GBq. At what
time was the second elution carried out?
- Ytterbium-169 (169 70 Yb) is obtained by bombarding 168
70 Yb with neutrons. The cross section is 1.1×10−24 m^2. The
half-life of the product is 32 d. Calculate the time required to
obtain maximum activity if the neutron flux is 1×10^18 m−2 s−1