Neutron monitor latitude survey of cosmic ray intensity during the 1986/1987 solar minimum
Journal Article
·
· J. Geophys. Res.; (United States)
A latitude survey of the cosmic ray intensity at sea level was conducted during the 1986/1987 solar minimum period on commercial vessels of the South African Marine Corporation (SAFMARINE). The results show that the differential response function for the 1986/1987 solar minimum agrees well with that measured in 1965. Both these response functions are significantly lower than those for 1976 and 1954. This result supports the 22-year modulation cycle as predicted, for example, by models including drift effects of the charged cosmic ray particles in the large-scale interplanetary magnetic field. A crossover of the spectra at rigidities of about 7 GV was also observed. Such a crossover is necessary to explain both the stationary neutron monitor counting rates and the lower-energy balloon and space observations in consecutive solar cycles. copyright American Geophysical Union 1989
- Research Organization:
- Department of Physics, Potchefstroom University for Christian Higher Education, Potchefstroom, South Africa
- OSTI ID:
- 6452679
- Journal Information:
- J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 94:A2; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIATION
COSMIC RAY FLUX
GEOGRAPHICAL VARIATIONS
INTERPLANETARY MAGNETIC FIELDS
IONIZING RADIATIONS
LATITUDE EFFECT
MAGNETIC FIELDS
RADIATION FLUX
RADIATIONS
SOLAR CYCLE
THRESHOLD RIGIDITY
VARIATIONS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIATION
COSMIC RAY FLUX
GEOGRAPHICAL VARIATIONS
INTERPLANETARY MAGNETIC FIELDS
IONIZING RADIATIONS
LATITUDE EFFECT
MAGNETIC FIELDS
RADIATION FLUX
RADIATIONS
SOLAR CYCLE
THRESHOLD RIGIDITY
VARIATIONS