Cloud-Chamber Identification of Photodeuterons from Copper

Abstract

The presence of a prominent group of photodeuterons, produced by the irradiation of copper with 65-Mev bremsstrahlung, was demonstrated by experiments employing a 12-in. cloud chamber traversed by a magnetic field. The mean curvature of each acceptable track studied was determined over a fixed range interval; the distribution of the curvatures so obtained provided a clear indication of proton and deuteron groups.