The formula for the shell method is $2\pi \int_{a}^{b} r(x)h(x)dx$, where $r(x)$ is the radius and $h(x)$ is the height. In this case, the radius is $x$ and the height is $e^{-x^{2}}$. The limits of integration are from $0$ to $1$. So, the integral becomes:
\[2\pi
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