Accession Number : AD0659992

Title :   THE ENERGY DEPENDENCE OF THE FRAGMENTATION PARAMETERS AND INTERACTION MEAN FREE PATHS IN NUCLEAR EMULSION FOR HEAVY COSMIC RAY NUCLEI.

Descriptive Note : Master's thesis,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS COSMIC RAY GROUP

Personal Author(s) : Cleghorn,Timothy E.

Report Date : 1967

Pagination or Media Count : 81

Abstract : It is generally assumed that the fragmentation parameters and absorption mean free paths used in extrapolating the charge spectrum of cosmic ray nuclei to the top of the atmosphere are independent of energy. However recent results suggest that these quantities are not energy independent in hydrogen, and thus it becomes of interest to determine whether they are in an air or heavy element medium. This report describes measurements of the fragmentation parameters and interaction mean free paths of VH nuclei in emulsion for primary energies up to about 30 BeV/n. Also measured was the mean free path of the fragment nuclei with Z = or > 3, produced in interactions in the emulsion. The predicted values of the mean free paths in air are compared with recent measurements by other workers.

Descriptors :   (*COSMIC RAYS, INTERACTIONS), THESES, GEOMAGNETISM, TRANSPORT PROPERTIES, NUCLEAR REACTIONS, NUCLEAR PARTICLES, PHOTOGRAPHY, UPPER ATMOSPHERE, NUCLEAR MODELS

Subject Categories : Atmospheric Physics
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE