//d2vlcm61l7u1fs.cloudfront.net/media%2F956%2F9561616f-ede0-455c-a321-707ccc19fc4c%2Fphpo5XwVJ.

http://d2vlcm61l7u1fs.cloudfront.net/media%2F956%2F9561616f-ede0-455c-a321-707ccc19fc4c%2Fphpo5XwVJ.png

(a) Determine the distance of closest approach of an 9 MeV α particle in a head-on collision with a stationary nucleus of 197Au and a stationary nucleus of 9B, neglecting the recoil of the struck nuclei.

(b) Repeat the calculation taking into account the recoil of the struk nuclei.