The following conversion factors may help you when working this problem: Activit

Question

The following conversion factors may help you when working this problem:

Activity in becquerels (bq)= activity in disintegration per second (dps)

1.00 mCi=3.70x10^7 Bq

Neutron activation analysis for a sample of rock revealed the presence of 140/56 Ba, which has a half life of 12.5 days. Assuming the isotope was freshly separated from its decay products, what is the mass of 140/56 Ba in a sample emitting 1.00mCI of radiation? Express your answer in grams in three significant figures.

Question 2:

BNCT relies on the initial targeting of tumor cells by an appropriate chemical compound tagged 10/5B, which preferentially concentrates in tumor cells. During the irradiation of the tumor site by neutrons (1/0 n) the 10/5 B absorbs a low-energy neutron (1/0 n) and it ejects an energetic short-range alpha particle (4/2 alpha or 4/2 He)and lithium ion along with gamma radiation (gamma) This radiation deposits most of its energy within the cell containing the original 10/5 B atom. Therefore, if a higher concentration of 10/5 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.

Explanation / Answer

Wrong

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.