Cosmic-ray abundances of Sn, Te, Xe, and BA nuclei measured on HEAO 3
W. R. BinnsDepartment of Physics and the McDonnell Center for the Space Sciences, Washington UniversityM. H. IsraelDepartment of Physics and the McDonnell Center for the Space Sciences, Washington UniversityJ. KlarmannDepartment of Physics and the McDonnell Center for the Space Sciences, Washington UniversityR. K. FickleSchool of Physics and Astronomy, University of MinnesotaC. J. WaddingtonMinnesota, University Minneapolis, MN, United StatesT. L. GarrardCalifornia Institute of TechnologyK. E. KrombelCalifornia Institute of TechnologyE. C. StoneCalifornia Institute of Technology
ABI
Abstract
Elements with even atomic number ( Z) in the interval 50 ~ Z ~ 56 have been resolved in the cosmic radiation using the Heavy Nuclei Experiment on the HEAO 3 satellite. The observation that 50 Sn and 56 Ba are more abundant than 52 Te and 54 Xe is inconsistent with a purer-process cosmic-ray source. Adjustment of source abundances for an enhancement of those elements with a low first ionization potential does not change this conclusion.
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