Observation of trans-iron nuclei in the primary cosmic radiation

Authors

G. E. Blanford, Washington University in St. Louis
M. W. Friedlander, Washington University in St. Louis
J. Klarmann, Washington University in St. Louis
R. M. Walker, Washington University in St. Louis
J. P. Wefel, Washington University in St. Louis
W. C. Wells, Washington University in St. Louis
R. L. Fleischer, GE Global Research
G. E. Nichols, GE Global Research
P. B. Price, GE Global Research

Document Type

Article

Publication Date

12-1-1969

Abstract

Interleaved layers of nuclear photographic emulsion and plastic detectors, covering a total area of 21 m2, were exposed to the primary cosmic radiation on high-altitude balloon flights. Flux values, in particles/m2 sr sec, have been estimated to be J(Z>~33)>~2.6×10-5, J(33<~Z<~40)<~1. 9×10-5, J(Z>~70)1×10-6. These values refer to the top of the atmosphere, after extrapolation through 1.5 g/cm2 of detector and 3.5 g/cm2 of atmosphere, for particles with magnetic rigidities above 5 GeV. © 1969 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

338

Last Page

342

Recommended Citation

Blanford, G., Friedlander, M., Klarmann, J., Walker, R., Wefel, J., Wells, W., Fleischer, R., Nichols, G., & Price, P. (1969). Observation of trans-iron nuclei in the primary cosmic radiation. Physical Review Letters, 23 (6), 338-342. https://doi.org/10.1103/PhysRevLett.23.338