PARIS - Yasser Arafat's widow asked a French court on Tuesday to launch a murder investigation into the death of the Palestinian leader, after a report suggested he was poisoned by a radioactive element before his death in a Paris military hospital in 2004.Arafat was flown to France in October 2004 from his battered headquarters, where he had been effectively confined by Israel for more than two and a half years, after a sudden collapse in his health.He died a month later. Arafat aides at the time quoted doctors as saying he had suffered a brain hemorrhage and lost the use of his vital organs one by one.Allegations of foul play quickly surfaced after the doctors who treated him said they could not establish a precise cause of the illness that led to his death.