Please explain "sampke".
It tells what fraction of a radioactive sample remains after a certain length of time.
Technetium pentafluoride is used in nuclear medicine for labeling compounds for imaging purposes, particularly in radioisotope scans. It can also be used in research laboratories for studying technetium chemistry and its properties.
Technetium primarily emits gamma radiation, which is a type of electromagnetic radiation with high energy and penetrating power. Additionally, technetium-99m, a common radioisotope of technetium used in medical imaging, emits low-energy gamma radiation suitable for imaging purposes.
The rate of decay for a radioactive sample
The rate of decay for a radioactive sample
One-half of the original amount. That's precisely the definition of "half-life".
The half-life of a radioisotope is the time it takes for half of the radioactive nuclei in a sample to decay. It is a characteristic property of each radioisotope and determines the rate at which the isotopes decay.
The metal technetium has no stable isotopes. It is synthesized in the physics lab by lowering a molybdenum sample into an operating nuclear reactor. The molybdenum is bathed in the nuetron flux, and neutron capture will occur and transmute the molybdenum into technetium. The sample is then withdrawn and put into a shielded casket to make it available for use. A link is provided to the Wikipedia article on technetium.
16 hours.
How long it takes for half of a sample to decay to another form.
The half-life of the radioisotope is 20 minutes. This means that in 20 minutes, half of the original sample (20g) remains. Therefore, if a 40g sample becomes 10g after 20 minutes, it has undergone 1 half-life.
The radioisotope Technetium-99m is commonly used in nuclear medicine for studies of bone formation. It has a short half-life and emits gamma rays that can be detected by imaging techniques to assess bone health.