Time Correlation of Heavy Cosmic Ray Nuclei.
CALIFORNIA UNIV RIVERSIDE INST OF GEOPHYSICS AND PLANETARY PHYSICS
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The time variation of heavy cosmic ray nuclei over a 4.5 hour period has been investigated. The results were obtained from a balloon flight from Ft. Churchill, Manitoba, 73 degrees North geomagnetic latitude, on July 22, 1972. Identifying the charge and kinetic energynucleon of incident, heavy cosmic ray nuclei by four simultaneous dEdx measurements and an active time of flight measurement, a detector was lifted by balloon to the top of the atmosphere where only 0.4 of residual atmosphere remained. During the 19 hours at float altitude, a continuous 4.5 hours were allocated to the heavy nuclei experiment. The magnitude of the galactic, heavy nuclei flux is perturbed during solar activity. With the high event rate capability of the particle spectrometer, the results of the time correlation showed no statistically significant evidence of small pertubations from the average intensity for the incident heavy nuclei with kinetic energies 350 MeVnucleon over the 4.5 hour exposure period. Minimal solar activity from July 17 through July 23 of 1972 supports this result. In addition, no evidence of a direct diurnal anisotropy consistent with the corotation of galactic heavy nuclei with the solar magnetic field was observed. Modified author abstract
- Atmospheric Physics