请帮我翻译下这段英语(人工翻译)
Atypicalscatteringexperimentinvolvesabeamwithmanyincidentparticlesallwiththesamekineticenergy.ThecoordinatesystemisshowninFigure5.7.Theincidentparticlescomefromtheleftwithaninitialvelocityvinthe+xdirection.Wetakethecenterofthebeamandthecenterofthetargettobeonthex-axis.Theimpactparameterbistheperpendiculardistancefromtheinitialtrajectorytoaparallellinethroughthecenterofthetarget(seeFigure5.7).Weassumethatthewidthofthebeamislargerthanthesizeofthetarget.Thetargetcontainsmanyscatteringcenters,butforcalculationalpurposes,wemayconsiderscatteringoffonlyoneparticleifthetargetissufficientlythin.