- #1

- 8

- 0

## Homework Statement

Integrate the rutherford cross section over the backward hemisphere to get 4pi(sigma0(E))

## Homework Equations

Rutherford cross section is sigma0(E)/sin^4(theta/2)

## The Attempt at a Solution

When I integrate this with the limits pi/2 to pi i get sigma0(E)*(8/3) i don't know what i'm doing wrong.