The Linear Attenuation Coefficient in Lead for ^99mTc Gamma Rays

question 33

Multiple Choice

The linear attenuation coefficient in lead for ^99mTc gamma rays (140 keV) is 23 cm^-1.What percentage of these gamma rays will be absorbed by a lead apron that contains 0.60 mm of lead?

• A)75%
• B)50%
• C)25%
• D)12.5%

---

Definitions:

Growth Rate

The growth rate refers to the percentage increase in the value, size, or number of something over a specific period.

Price-Earnings Ratio

A valuation metric for companies, calculated by dividing the current market price of a stock by its earnings per share.

Dividend Payout Ratio

The dividend payout ratio is the proportion of earnings paid to shareholders in the form of dividends, expressed as a percentage of the company's total earnings.

Investor Risk Aversion

A measure of an investor's tolerance for risk and their capability to endure financial losses.