Evidence for interplanetary acceleration of cosmic rays - The GLE of 4 August 1972

Details Evidence for interplanetary acceleration of cosmic rays - The GLE of 4 August 1972 Evidence for interplanetary acceleration of cosmic rays - The GLE of 4 August 1972

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988p%26ss...36..539m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 36, June 1988, p. 539-542.

Other

Cosmic Ray Showers, Earth Orbital Environments, Particle Acceleration, Radiant Flux Density, Solar Flares

Scientific paper

The ground level event (GLE) of 4 August 1972 as observed by three pairs of nearby neutron monitors was examined to see whether there was any evidence of interplanetary acceleration during this event. A simple way of determining the altitude dependence of neutron monitor specific yield functions below a few gigavolts was empirically derived using the data from other GLEs. The observed ratios of increases at these stations showed a systematic decrease with time, indicating that the power law exponent of the flare particle spectrum was decreasing with time. This meant that higher rigidity particles were becoming relatively more numerous at the Earth as the GLE progressed.

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