Typical activity (mCca, where Procedure, isotope 1 mCi= 3.7x10' Bq Brain scan 7.5 11 In 7.5 1"C PET) 20 13N (PET) 20 150 PET) 50 18F (PET) 10 Lung scan 133 Xe 7.5 Cardiovascular blood pool 1311 0.2 Cardiovascular arterial flow 201 TI 24 Na 7.5 Thyroid scan 1311 0.05 1231 0.07 Liver scan 198 Au (colloid) 0.1 Te (colloid) Bone scan 0.1 10 Kidney scan 197 Hg 0.1 1.5
Nuclear Fusion
Nuclear fusion is a type of nuclear reaction. In nuclear fusion, two or more than two lighter atomic nuclei combine to form a heavier nucleus. During this process, an enormous amount of energy is released. This energy is called nuclear energy. Nuclear fusion is the energy source of the sun and stars.
Fusion Bomb
A fusion bomb is also known as a thermonuclear bomb or hydrogen bomb which releases a large amount of explosive energy during a nuclear chain reaction when the lighter nuclei in it, combine to form heavier nuclei, and a large amount of radiation is released. It is an uncontrolled, self-sustaining nuclear chain reaction where isotopes of hydrogen combine under very high temperature to form helium. They work on the principle of operation of atomic fusion. The isotopes of Hydrogen are deuterium and tritium, where they combine their masses and have greater mass than the product nuclei, get heated at high temperatures, and releases energy.
(a) Neutron activation of sodium, which is 100% 23 Na ,
produces 24 Na , which is used in some heart scans, as seen
in Table . The equation for the reaction is
23 Na + n → 24 Na + γ . Find its energy output, given the
mass of 24 Na is 23.990962 u.
(b) What mass of 24 Na produces the needed 5.0-mCi
activity, given its half-life is 15.0 h?
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