Physics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..127..347h&link_type=abstract
(Sun in Time Conference, Tucson, AZ, Mar. 6-10, 1989) Solar Physics (ISSN 0038-0938), vol. 127, June 1990, p. 347-356.
Physics
14
Absorption Cross Sections, Capture Effect, Fourier Analysis, Solar Neutrinos, Spectrum Analysis, Temporal Distribution, Power Spectra, Solar Activity, Solar Cycles
Scientific paper
Periodic variations in Davis' experimental data concerning the solar neutrino capture rate are derived on the basis of a Fourier spectrum analysis. Variations in the Ar-37 production rate are obtained for a series of randomly spaced observations in the period 1970-1985 (runs 18-89). The harmonic analysis of runs 18-89 has determined solar neutrino capture rate variations with periods of 8.33, 5.00, 2.13, 1.61, 0.83, 0.61, 0.54, and 0.51 yr, thereby confirming earlier calculations performed for the set of runs 18-69 (1983), 18.74 (1985a), and 18-80 (1985b). The results also confirm those of Sakurai (1979) who showed that there is strong evidence that the observed solar neutrino flux has a tendency to vary with quasi-biennial periodicity. It is shown that the results of the Fourier spectrum analysis do not depend upon certain high or low values in Davis' experimental data.
Gerth Ewald
Haubold Hans Joachim
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