The intensity of gamma rays passing through a material as a function of thickness,x is given by $The intensity of gamma rays passing through a material as a function of thickness,x is given by where n is the number of atoms per cm3 and \sigma is the absorption cross section.If the intensity of gamma rays of a particular energy is reduced by half when they passed through 1 cm of lead,what is the absorption cross section for the gamma rays? The density of lead is 11.3 g/cm3 and its molar mass is 207 g. A)3.5 \times 10-22 cm2 B)6.8 \times 10 -22 cm2 C)4.6 \times 10 -23 cm2 D)2.1 \times 10 -23 cm2 E)8.4 \times 10 -24 cm2$ where n is the number of atoms per cm³ and

\sigma

is the absorption cross section.If the intensity of gamma rays of a particular energy is reduced by half when they passed through 1 cm of lead,what is the absorption cross section for the gamma rays? The density of lead is 11.3 g/cm³ and its molar mass is 207 g.
A)3.5

\times

10^-22 cm²
B)6.8

\times

10 ^-22 cm²
C)4.6

\times

10 ^-23 cm²
D)2.1

\times

10 ^-23 cm²
E)8.4

\times

10 ^-24 cm²

Uranium Decomposes Radioactively to Form Thorium (Atomic Number 90)by Emitting α\alphaα

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Uranium Decomposes Radioactively to Form Thorium (Atomic Number 90)by Emitting $\alpha$

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