Why Radioisotopes in nuclear medicine are desirable to have shorter half-lives?

Related Questions

• Do all elements have half-lives?
   - Yes, all elements have half lives because all elements have to decay sonner or later.
• Do radioactive cats have 18 half-lives?
   - Yes, but you have to remember that if it is radioactive, it also suffers from radioactive decay.
• Can the vegetation around a nuclear plant absorb the radioisotopes released from NPPs thereby reduce the spread of contamination?
   - In general, green belt around a NPP is intended to trap particulate gaseous effluents and thereby reduce the ...
• What are some types of ionizing radiation emitted when radioisotopes decay into daughter isotopes?
   - Daughter products are produced by the same type of decay particle emission as produced their parents Alpha ...
• How do radioisotopes of an element differ from other isotopes?
   - Isotopes have wrong # of neutrons; same w/ radioisotopes but the nucleus is unstable- emits alpha/beta/gamma ...