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89 solutions

Radioactive Decay

Q. BNCT relies on the initial targeting of tumor cells by an appropriate chemical compound tagged with 10-B, which preferentially concentrates in tumor cells. During the irradiation of the tumor site by neutrons (1-n) the 10-B absorbs a low-energy neutron (1-n), and it ejects an energetic short-range alpha particle (4-α or 4-He) and lithium ion along with gamma radiation (γ). This radiation deposits most of its energy within the cell containing the original 10-B atom. Therefore, if a higher concentration of 10-B exists in tumor cells relative to other normal tissues, a concomitantly higher dose will be delivered to the tumor cells during neutron irradiation. What is the nuclear reaction that takes place in the tumor cell? Express your answer as a nuclear equation.

Solved • Mar 17, 2020

Radioactive Decay

Q. If you purchased 3.61 μCi of sulfur-35, how many disintegrations per second does the sample undergo when it is brand new? Express your answer numerically in disintegrations per second.

Solved • Mar 17, 2020

Radioactive Decay

Q. Predict a likely mode of decay for each of the following unstable nuclides. Nb-102 a) beta decay b) positron emission

Solved • Mar 17, 2020

Radioactive Decay

Q. 230-Th undergoes beta decay. What is the mass number of the resulting element? Express your answer numerically as an integer.

Solved • Mar 16, 2020

Radioactive Decay

Q. 234-U undergoes beta decay. What is the atomic number of the resulting element? Express your answer numerically as an integer.

Solved • Mar 16, 2020

Radioactive Decay

Q. 234-Pa undergoes beta decay. What is the atomic number of the resulting element? Express your answer numerically as an integer.

Solved • Mar 16, 2020

Radioactive Decay

Q. 234-Th undergoes beta decay. What is the atomic number of the resulting element? Express your answer numerically as an integer.

Solved • Mar 16, 2020