THE FLUX AND ENERGY SPECTRUM OF COSMIC RAY $alpha$-PARTICLES DURING SOLAR MAXIMUM
Technical Report
·
OSTI ID:4244396
The fluxes of primary cosmic alpha particles over Minnesota and Texas were measured during the present period of maximum solar activity. A value of 136 plus or minus 9 alpha particles/m/sup 2/ sec ster was measured over Minnesota and of 68 plus or minus 4 alpha particles/m/sup 2/ sec ster over Texas. In both cases these values are significantly lower than those observed at solar minimum. The energy spectrum was determined between 20O Mev/nucleon and 3.0 Bev/ nucleon. Results show that the slope of the integral spectrum is less than that observed at solar minimum and that a significant number of low energy particles is still present. A possible mechanism for these changes is discussed briefly. The determination of energies of particles from a measurement of their ionization is discussed in detail. (auth)
- Research Organization:
- Minnesota. Univ., Minneapolis. School of Physics
- NSA Number:
- NSA-13-015551
- OSTI ID:
- 4244396
- Report Number(s):
- AD-208421
- Country of Publication:
- United States
- Language:
- English
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