A cloud and bubble chamber study of proton-proton interactions at 970 MeV

[摘要] Chapter I describes an experiment to study proton-proton interactions at 970 MeV. A high pressure diffusion cloud chamber was filled with hydrogen at 25 atmospheres and operated in the proton beam from the Birmingham synchrotron. A pulsed magnetic field of 13,000 oersted, applied to the chamber, enabled momenta of primary and secondary particles to be measured. 1029 events were observed due to the interaction of protons with protons. Of these, 565 events were attributed to elastic collisions and are discussed in terms of the optical model of the nucleus, giving a radius of interaction of 0.9 ± 0.1 × 10⁻¹³cms. Information from 458 inelastic events is compared with the statistical theory of pion production due to Fermi, and the isobar theory due to Peaslee. The results for positive pion production support Peaslee's theory but there are certain anomalies in the neutral pion production. Chapter II contains a description of a 9" diameter liquid hydrogen bubble chamber for use with the Birmingham synchrotron. Details are given of the chamber and expansion system along with the cryogenic, vacuum, high pressure and optical systems and the method for obtaining a pulsed magnetic field. The operation of the apparatus is discussed and an enclosed system for filling the chamber with deuterium is described. Finally, possible experiments that may be performed are mentioned.

[发布机构] University:University of Birmingham;Department:Department of Physics

[关键词] Q Science;QC Physics