The Production of Mesons by the 184-inch Berkeley Cyclotron Part II. Mass Determination

Download or read book The Production of Mesons by the 184-inch Berkeley Cyclotron Part II. Mass Determination written by and published by . This book was released on 1948 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The mass of the mesons produced by the 184-inch Berkeley cyclotron has been determined by measuring the bending in the magnetic field and the range in emulsion. The radius of curvature of the trajectory is found by measuring the distance from the target to the point at which the mesons enters the emulsion and the angle which the track makes with the edge of the plate. From the first 50 meson tracks measured they find a mass of 313 ± 16 electron masses. It is highly probable that these mesons are the heavy mesons described by Lattes, Occhialini, and Powell. The mass determination which we have made was done with apparatus intended only for survey work, and some of the error is associated with lack of precision of location of the photographic plates. There was an aluminum foil of thickness 0.001 inches in front of the plates. It is thought that much better accuracy will be possible with better apparatus and a thinner foil.