Interplanetary cosmic ray intensity: 1972-1984 and out to 32 AU. Progress report

Technical Report · Wed Aug 01 04:00:00 EDT 1984

OSTI ID:6207563

Van Allen, J A; Randall, B A

Using a number of Geiger-Mueller tubes in the University of Iowa instruments on Pioneer 10 and Pioneer 11, we have measured the interplanetary intensity of cosmic rays E sub P > 80 meV) over a complete solar activity cycle and out to a helicocentric distance of over 32 AU. Free space values of the background corrections due to the radioisotope thermal generators were determined during passage of Pioneer 11 under the dense rings of Saturn during the 1 September 1979 encounter. These improved corrections and ones inferred therefrom for Pioneer 10 have supplanted earlier estimates and have been applied to all data.

• Research Organization: Iowa Univ., Iowa City (USA). Dept. of Physics and Astronomy
• OSTI ID: 6207563
• Report Number(s): AD-A-145130/1
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
COSMIC RADIATION
COSMIC RAY DETECTION
DATA ACQUISITION
DETECTION
ELEMENTARY PARTICLES
ENERGY
FERMIONS
HADRONS
INTERPLANETARY SPACE
IONIZING RADIATIONS
KINETIC ENERGY
NUCLEONS
PIONEER SPACE PROBES
PROTONS
RADIATION DETECTION
RADIATIONS
SOLAR ACTIVITY
SPACE
SPACE VEHICLES
VEHICLES