Accession Number : AD0608770

Title :   THE ENERGY DEPENDENCE OF THE ABUNDANCE OF LITHIUM, BERYLLIUM, AND BORON IN THE PRIMARY COSMIC RADIATION: OBSERVATIONS AT FORT CHURCHILL,

Corporate Author : ROCHESTER UNIV N Y

Personal Author(s) : Badhwar,G. D. ; Devanathan,S. N. ; Kaplon,M. F.

Report Date : 13 OCT 1964

Pagination or Media Count : 40

Abstract : The relative abundance of Lithium, Beryllium, Boron, and the S-group nuclei has been determined at two different energies with the help of a pure nuclear emulsion stack flown from Fort Churchill, Canada (lambda = 70.5) on 4 August, 1962 under a total of 4.7 g/sq. cm of residual atmosphere. The ratio of the L to S nuclei, LS, at the top of the atmosphere between 200-700 Mev/n and > 700 Mev/n was determined as 0.41 = 0.08 and 0.19 = 0.03 respectively. The results of both the absolute flux values of L and S-group nuclei as well as their ratios are in accord with other investigations. Combined with the evidence from the measurements of He3He in the same stack, our results indicate that low energy cosmic ray nuclei have traversed about twice as much hydrogen as high energy particles. The results rule out an accelerating mechanism of the Fermi type but may be explained by a source-trapping mechanism. (Author)

Descriptors :   (*COSMIC RAYS, SPECTROSCOPY), (*LITHIUM, COSMIC RAYS), (*BERYLLIUM, COSMIC RAYS), (*BORON, COSMIC RAYS), ENERGY, NUCLEAR PARTICLES, ATMOSPHERES, SPALLATION, IONIZATION, MEASUREMENT, ASTROPHYSICS, NUCLEAR PHYSICS, GEOPHYSICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE