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Record Details

Record 90 of 42792
Determination of the radial gradient in the region 0.81-1.0 AU using both high- and low-energy /more than 10-GeV and more than 52-MeV/ detectors for the 1-AU monitor. [solar quiet measurements of alpha particles and protons]
Author and Affiliation:
Sheldon, W. R.(Houston, University, Houston, Tex., United States)
Bukata, R. P.(Canada Centre for Inland Waters, Burlington, Ontario, Canada)
Rao, U. R.
Abstract: A determination of the radial gradient for alpha particles (31-46 MeV/nuc) and protons with energies above 7.5 MeV and 44-77 MeV in the region 1.0-0.81 AU is presented for the solar-quiet year 1966. The determinations are based on data from the Pioneer 6 space probe. Two different detectors are used: the Deep River neutron monitor and measurements of low energy protons made on the IMP-C satellite. The average energy response of the Deep River monitor is 16 GeV, whereas the IMP-C data is for protons with energies above 50 MeV. The resulting radial gradient is found to be nearly zero for the alpha particles and slightly negative for the protons. The same qualitative results were found using the IMP-C data and the Deep River neutron monitor to measure the temporal variation in the cosmic ray intensity. The present analysis indicates that detectors over a wide range of energies are suitable for measuring the radial gradient, providing sufficient statistical precision is obtained to evaluate short-term modulation and the azimuthal separation of the detectors is not great.
Publication Date: Jan 01, 1974
Document ID:
19750038530
(Acquired Dec 01, 1995)
Accession Number: 75A22602
Subject Category: SPACE RADIATION
Document Type: Conference Proceedings
Publication Information: (SEE A75-22580 08-92)
Publisher Information: Brazil
Meeting Information: International Symposium on Solar-Terrestrial Physics; June 17-22, 1974; Sao Paulo; Brazil
Contract/Grant/Task Num: NAS2-3945; NGR-44-005-133
Financial Sponsor: NASA; United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ALPHA PARTICLES; PIONEER 6 SPACE PROBE; PROTON ENERGY; RADIATION MEASURING INSTRUMENTS; SATELLITE-BORNE INSTRUMENTS; COSMIC RAYS; NEUTRON COUNTERS; REGRESSION ANALYSIS; TIME DEPENDENCE
Imprint And Other Notes: In: International Symposium on Solar-Terrestrial Physics, Sao Paulo, Brazil, June 17-22, 1974, Proceedings. Volume 1. (A75-22580 08-92) Sao Jose dos Campos, Brazil, Instituto de Pesquisas Espaciais, 1974, p. 237-246. Research supported by the Department of Atomic Energy of India;
Availability Source: Other Sources
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