Charged particles can be accelarated in an electromagnetic field, but uncharged particles (like neutrons) cannot.

I'm looking forward to getting next years Physics Nobel Prize because I have some great ideas about energy. I thought the Nobel Prize Committee made a serious judgement error when they gave the racist de Klerk of South Africa the Nobel Peace Prize together with the deserved winner Mandela a few year's ago. Now they've given it to someone who has great ideas but who is in charge of a country at war which continues to incarcerate people at Guantanemo Bay without trial. Maybe there will be more respect for the Ig-Nobel prize after this.